.github/workflows/release.yml

@@ -12,7 +12,6 @@ on:
   push:
     tags:
       - 'v*'
-  workflow_dispatch: {}   # dry-run the build matrix without tagging
 
 permissions:
   contents: write   # create/update the GitHub Release and upload assets
@@ -27,18 +26,10 @@ jobs:
         include:
           - os: ubuntu-latest
             target: x86_64-linux
-            shell: bash
           # No x86_64-macos: GitHub is retiring the macos-13 Intel runner (jobs
           # queue forever). Intel Macs build from source. macos-14 is arm64.
           - os: macos-14
             target: aarch64-macos
-            shell: bash
-          - os: windows-latest
-            target: x86_64-windows
-            shell: msys2 {0}
-    defaults:
-      run:
-        shell: ${{ matrix.shell }}
     steps:
       - uses: actions/checkout@v5
         with:
@@ -87,65 +78,6 @@ jobs:
         if: runner.os == 'macOS'
         run: brew install chezscheme lz4
 
-      # --- Windows: MSYS2/MinGW-w64 toolchain + Chez built from source (ta6nt).
-      # The whole job runs in the msys2 shell so cc/xxd/paths behave; the
-      # produced joltc.exe is a plain Windows binary (no MSYS runtime dep). ---
-      - name: Set up MSYS2 (Windows)
-        if: runner.os == 'Windows'
-        uses: msys2/setup-msys2@v2
-        with:
-          msystem: MINGW64
-          update: false
-          # inherit the runner PATH so GITHUB_PATH additions (the chez wrapper
-          # dir) are visible inside the msys2 shell
-          path-type: inherit
-          install: >-
-            git make vim unzip zip
-            mingw-w64-x86_64-gcc
-            mingw-w64-x86_64-lz4
-            mingw-w64-x86_64-zlib
-            mingw-w64-x86_64-ntldd
-
-      - name: Cache Chez Scheme (Windows)
-        if: runner.os == 'Windows'
-        id: cache-chez-win
-        uses: actions/cache@v4
-        with:
-          path: chez-install
-          key: chez-${{ runner.os }}-v10.4.1-mingw64
-
-      - name: Build Chez Scheme from source (Windows)
-        if: runner.os == 'Windows' && steps.cache-chez-win.outputs.cache-hit != 'true'
-        run: |
-          git clone --depth 1 --branch v10.4.1 https://github.com/cisco/ChezScheme.git /tmp/chez-src
-          cd /tmp/chez-src
-          ./configure --threads
-          make -j"$(nproc)"
-          # `make install` drives the unix installsh through cmd and dies; the
-          # build tree has everything — assemble the layout by hand. Boot files
-          # sit next to scheme.exe (that's where the Windows kernel looks).
-          inst="$GITHUB_WORKSPACE/chez-install"
-          mkdir -p "$inst/bin" "$inst/csv"
-          cp ta6nt/bin/ta6nt/*.exe "$inst/bin/"
-          cp ta6nt/bin/ta6nt/*.dll "$inst/bin/" 2>/dev/null || true
-          cp ta6nt/boot/ta6nt/petite.boot ta6nt/boot/ta6nt/scheme.boot "$inst/bin/"
-          cp ta6nt/boot/ta6nt/petite.boot ta6nt/boot/ta6nt/scheme.boot "$inst/csv/"
-          cp ta6nt/boot/ta6nt/scheme.h "$inst/csv/"
-          cp ta6nt/boot/ta6nt/equates.h "$inst/csv/" 2>/dev/null || true
-          cp ta6nt/boot/ta6nt/libkernel.a "$inst/csv/" || { echo "libkernel.a not found:"; find ta6nt -name "*.a" -o -name "kernel*"; exit 1; }
-
-      - name: Put chez on PATH (Windows)
-        if: runner.os == 'Windows'
-        run: |
-          bindir="$GITHUB_WORKSPACE/chez-install/bin"
-          { echo '#!/bin/sh'; echo "exec \"$bindir/scheme.exe\" \"\$@\""; } > "$bindir/chez"
-          chmod +x "$bindir/chez"
-          echo "$bindir" >> "$GITHUB_PATH"
-          echo "JOLT_CHEZ_CSV=$GITHUB_WORKSPACE/chez-install/csv" >> "$GITHUB_ENV"
-          # cc is the build's compiler name; alias it to mingw gcc
-          { echo '#!/bin/sh'; echo 'exec gcc "$@"'; } > "$bindir/cc"
-          chmod +x "$bindir/cc"
-
       - name: Show Chez version
         run: chez --version
 
@@ -154,19 +86,6 @@ jobs:
       # dev-machine check — see jolt-8479). `make joltc-release`, not `make joltc`.
       - name: Build joltc (release)
         run: make joltc-release
-        env:
-          # Bake the release tag into the binary (build-joltc falls back to
-          # `git describe` when this is empty, e.g. a workflow_dispatch dry run).
-          JOLT_VERSION: ${{ startsWith(github.ref, 'refs/tags/') && github.ref_name || '' }}
-
-      - name: Inspect the binary (Windows)
-        if: runner.os == 'Windows'
-        run: |
-          set +e
-          ls -la target/release/
-          ntldd target/release/joltc.exe 2>&1 | head -20
-          ./target/release/joltc.exe -e '(+ 1 2)'
-          echo "exit=$?"
 
       # Sanity: the built binary runs (no Chez needed) and self-reports a value.
       - name: Smoke the binary
@@ -213,24 +132,16 @@ jobs:
           ver="${GITHUB_REF_NAME}"
           name="joltc-${ver}-${{ matrix.target }}"
           mkdir -p "dist/${name}"
-          cp README.md LICENSE "dist/${name}/"
-          if [ "${{ runner.os }}" = "Windows" ]; then
-            cp target/release/joltc.exe "dist/${name}/joltc.exe"
-            ( cd dist && zip -r "${name}.zip" "${name}" && sha256sum "${name}.zip" > "${name}.zip.sha256" )
-          else
           cp target/release/joltc "dist/${name}/joltc"
+          cp README.md LICENSE "dist/${name}/"
           tar -C dist -czf "dist/${name}.tar.gz" "${name}"
           ( cd dist && shasum -a 256 "${name}.tar.gz" > "${name}.tar.gz.sha256" )
-          fi
           ls -la dist
 
       - name: Upload to the GitHub Release
-        if: startsWith(github.ref, 'refs/tags/')
         uses: softprops/action-gh-release@v2
         with:
           files: |
             dist/*.tar.gz
             dist/*.tar.gz.sha256
-            dist/*.zip
+          fail_on_unmatched_files: true
-            dist/*.zip.sha256
-          fail_on_unmatched_files: false

.github/workflows/tests.yml

@@ -56,11 +56,7 @@ jobs:
       - name: Install JDK + Clojure (certify oracle)
         run: |
           sudo apt-get install -y default-jdk rlwrap
-          # --retry + --fail so a transient CDN error retries instead of handing
+          curl -L -O https://github.com/clojure/brew-install/releases/latest/download/linux-install.sh
-          # bash an HTML error page (a 2min timeout page flaked a run)
-          curl --fail --retry 5 --retry-delay 10 --retry-all-errors -L -O \
-            https://github.com/clojure/brew-install/releases/latest/download/linux-install.sh
-          head -1 linux-install.sh | grep -q '^#!' || { echo "installer download corrupt"; cat linux-install.sh | head -5; exit 1; }
           sudo bash linux-install.sh
           clojure --version
 

Makefile

@@ -4,23 +4,18 @@
 # build step. `make test` is the full gate. `make remint` rebuilds the seed after a
 # source change.
 
-.PHONY: test ci values corpus unit smoke buildsmoke staticnativesmoke selfhost sci cts certify ffi transient infer wp devirt fieldread numwp fieldnum protoret narrow directlink numeric inline shakesmoke remint joltc joltc-release joltc-debug joltcsmoke submodules
+.PHONY: test ci values corpus unit smoke buildsmoke staticnativesmoke selfhost sci cts certify ffi transient infer wp devirt fieldread numwp fieldnum protoret narrow directlink numeric inline shakesmoke remint joltc joltc-release joltc-debug joltcsmoke
-
-# Every target needs the vendored submodules; fail with the fix, not a load error.
-submodules:
-	@test -f vendor/irregex/irregex.scm || { \
-	  echo "vendor submodules missing; run: git submodule update --init --recursive"; exit 1; }
 
 # Full gate (dev machine). Includes the self-host byte-fixpoint, which only holds
 # on the same Chez that minted the seed.
-test: submodules selfhost ci
+test: selfhost ci
 	@echo "OK: all gates passed"
 
 # CI gate: behavior only. The checked-in seed is a minted artifact (like a
 # lockfile) — it RUNS correctly on any Chez, but `selfhost` rebuilds it and a
 # different Chez version may emit byte-different (gensym/order) output, so the
 # byte-fixpoint is a dev-machine check, not a CI one (jolt-8479).
-ci: submodules values corpus unit smoke buildsmoke staticnativesmoke sci cts ffi transient infer wp devirt fieldread numwp fieldnum protoret narrow directlink numeric inline certify
+ci: values corpus unit smoke buildsmoke staticnativesmoke sci cts ffi transient infer wp devirt fieldread numwp fieldnum protoret narrow directlink numeric inline certify
 	@echo "OK: CI gates passed"
 
 # Self-host fixpoint: bootstrap.ss rebuild == checked-in seed.

README.md

@@ -9,12 +9,8 @@ runs it on Chez. The compiler is self-hosted: it is written in Clojure
 
 ## Install
 
-Grab the self-contained `joltc` binary (Linux/macOS/Windows) — it bundles the
+Grab the self-contained `joltc` binary (Linux/macOS) — it bundles the runtime,
-runtime, compiler, and standard library, so there is nothing else to install.
+compiler, and standard library, so there is nothing else to install.
-Download the binary archive for your platform from the
-[releases page](https://github.com/jolt-lang/jolt/releases) (`joltc-<ver>-<platform>.tar.gz`,
-or the `.zip` on Windows). The "Source code" archives GitHub attaches to every
-release are not binaries — see [Build](#build) before using one.
 
 With Homebrew:
 
@@ -49,18 +45,6 @@ cd jolt
 bin/joltc -e '(+ 1 2)'        # => 3
 ```
 
-The `--recurse-submodules` matters: jolt vendors its regex engine and test
-suites as git submodules. In a checkout that's missing them (a plain
-`git clone`, or after pulling a commit that adds one), fetch them with:
-
-```bash
-git submodule update --init --recursive
-```
-
-Note that GitHub's auto-generated "Source code (zip/tar.gz)" archives on the
-releases page do **not** contain submodules, so they can't run or build —
-clone the repo instead (or grab a prebuilt binary from the same page).
-
 After changing a compiler source — the reader (`host/chez/reader.ss`), the
 analyzer/IR/backend (`jolt-core/jolt/*.clj`), or the `clojure.core` overlay
 (`jolt-core/clojure/core/*.clj`) — re-mint the seed:

bin/joltc

@@ -14,28 +14,5 @@
 # JOLT_PWD.
 root="$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)"
 export JOLT_PWD="${JOLT_PWD:-$PWD}"
-
-# Identify the Chez Scheme executable
-while read -r CHEZ
-do
-    if [ `which ${CHEZ}` ]
-    then
-	break;
-    fi
-done <<EOF
-chez
-chezscheme
-EOF
-
-# If we failed to find one, whinge and exit.
-if [ ! `which ${CHEZ}` ]
-then
-    echo "No valid Chez Scheme executable found: please install Chez Scheme."
-    exit 1
-fi
-
-# Version for --version / banners: git describe of this checkout, else "dev".
-export JOLT_VERSION="${JOLT_VERSION:-$(git -C "$root" describe --tags --always --dirty 2>/dev/null || echo dev)}"
 cd "$root" || exit 1
-exec ${CHEZ} --script host/chez/cli.ss "$@"
+exec chez --script host/chez/cli.ss "$@"
-

docs/spec/02-reader.md

@@ -225,31 +225,3 @@ reader functions are the deliberate exception, S20). Forms read identically
 whether or not they will be evaluated; `read-string` of any printable value
 `v` followed by evaluation yields a value equal to `v` for the
 self-evaluating types (§4 print/read round-trip contract).
-
-## Strict tokens and edn mode
-
-The reader rejects what the reference rejects (corpus `edn / strictness`,
-`reader / strict tokens`):
-
-- A token that starts like a number but doesn't parse as one is
-  NumberFormatException, never a symbol: `1a`, `08` (a leading zero demands
-  octal digits; `042` is 34), `0x2g`, `2r2`. A ratio's parts are plain digit
-  runs (`1/-1` is invalid); a zero denominator is ArithmeticException.
-- Empty ns/name parts are invalid tokens: `:`, `::`, `foo/`, `/foo`, `:/foo`.
-  `/` (division), `ns//` and `:/` (a name of exactly `/`) are valid.
-- Map literals with duplicate keys and set literals with duplicate elements
-  throw IllegalArgumentException at read.
-- An unsupported string escape (`"\q"`) and an octal escape past `\377`
-  (string or `\o` char) throw. A stray close delimiter at top level is
-  "Unmatched delimiter". `\r` terminates a line comment like `\n`.
-- `#inst` validates its calendar fields progressively (month 1–12, day valid
-  for the month including leap years, hour < 24, minute < 60); `#uuid`
-  demands canonical 8-4-4-4-12 hex.
-
-clojure.edn adds on top of that (`__read-form-edn` seam): auto-resolved
-keywords (`::k`) are invalid (no resolution context), each `#_` discarded
-form is validated through the same `:readers`/`:default` pipeline (an
-unreadable tagged element throws even when discarded), `M` literals
-construct BigDecimals, lists satisfy `list?`, and end-of-input honors the
-`:eof` option — an opts map without `:eof` makes EOF an error, while the
-no-opts arity returns nil.

docs/tools-deps.md

@@ -182,30 +182,6 @@ a root, transitively.
 - Source only; compiled `.class` files in a git dep are ignored.
 - git `:git/sha` must be a full SHA (`git fetch` can't resolve a short one).
 
-## Stack traces
-
-An uncaught error prints the message, the top-level source location, and — when
-frames are available — a `trace:` backtrace. In an AOT `jolt build --direct-link`
-binary the frames map to `ns/name (file:line)`; on the runtime eval path they are
-the surviving fn names. Tail-call optimization erases tail-called frames, so the
-default trace shows only the non-tail spine.
-
-A fuller **tail-frame history** recovers the frames TCO erases: each compiled fn
-records itself on entry into a bounded ring-of-rings buffer, so the trace shows
-TCO-elided frames (including the immediate error site) while a tight tail loop
-stays bounded and its non-tail caller context is preserved.
-
-It is **on by default in REPL-driven development** — a `repl` or nREPL session
-turns it on, so an error in code you evaluate or reload shows a tail-frame trace
-with no setup. Because the recording is baked in at compile time, only code
-compiled while a session is live is traced; reload a namespace to trace code that
-was already loaded (e.g. an app's initial `-M:run` load before its nREPL started).
-
-Elsewhere it is off (a small per-call cost, and never emitted into a `jolt build`
-binary). Override with the environment: `JOLT_TRACE=1` forces it on for a whole
-run — including a plain `-M:run`, so the app's own load is traced — and
-`JOLT_TRACE=0` forces it off, even in a REPL/nREPL session.
-
 ## Conformance
 
 The known-working libraries (see [libraries.md](libraries.md)) and the

host/chez/build-joltc.ss

@@ -46,15 +46,6 @@
 (unless (or jb-release? (string=? jb-profile "debug"))
   (error 'build-joltc "profile must be \"release\" or \"debug\"" jb-profile))
 
-;; Version baked into the binary's saved heap. Prefer $JOLT_VERSION (CI sets it to
-;; the release tag); else derive it from git in this checkout; else "dev".
-(define jb-version
-  (let ((env (getenv "JOLT_VERSION")))
-    (if (and env (> (string-length env) 0))
-        env
-        (let ((s (bld-sh-capture "git describe --tags --always --dirty 2>/dev/null")))
-          (if (> (string-length s) 0) s "dev")))))
-
 (define jb-build (string-append jb-out ".build"))
 (bld-check-toolchain)
 (bld-system (string-append "mkdir -p '" (path-parent jb-out) "' '" jb-build "'"))
@@ -145,10 +136,11 @@
 (scheme-start
   (lambda args
     (set-source-roots! (list \"jolt-core\" \"stdlib\"))
-    ;; JOLT_TRACE at RUNTIME (the env is unset at heap-build), before any app ns
+    (guard (v (#t (jolt-report-throwable v (current-error-port))
-    ;; compiles, so a `-M:run` traces the app's own code.
+                  (let ((bt (jolt-backtrace-string v)))
-    (jolt-trace-init-from-env!)
+                    (when bt (display \"  trace:\\n\" (current-error-port))
-    (guard (v (#t (jolt-report-throwable v (current-error-port)) (exit 1)))
+                          (display bt (current-error-port))))
+                  (exit 1)))
       (cond
         ((and (= (length args) 2) (string=? (car args) \"-e\"))
          (let ((result (jolt-final-str
@@ -172,10 +164,6 @@
   (jb-emit-runtime-embeds out)
   (put-string out "\n;; === embedded jolt-core + stdlib source ===\n")
   (jb-emit-source-embeds out)
-  ;; Bake the version into the saved heap (runs at heap-build; loader.ss defined
-  ;; jolt-baked-version above, so this set! resolves).
-  (put-string out (string-append "\n;; === baked version ===\n(set! jolt-baked-version "
-                                 (ei-str-lit jb-version) ")\n"))
   (put-string out "\n;; === joltc launcher ===\n")
   (jb-emit-launcher out)
   (close-port out))
@@ -257,8 +245,6 @@
 ;; table so `build` can foreign-entry them to spill the bundled Chez boots. On
 ;; Linux dlsym can't see executable symbols otherwise (macOS exports them anyway).
 (bld-system (string-append
-  ;; the embedded jolt_* arrays must be foreign-entry-visible at runtime:
+  "cc -O2 -rdynamic -I'" bld-csv-dir "' -I'" jb-build "' '" jb-main-c "' '"
-  ;; -rdynamic on ELF; on Windows an exe needs an export table (GetProcAddress).
-  "cc -O2 " (if bld-nt? "-Wl,--export-all-symbols " "-rdynamic ") "-I'" bld-csv-dir "' -I'" jb-build "' '" jb-main-c "' '"
   bld-csv-dir "/libkernel.a' -o '" jb-out "' " (bld-link-libs)))
 (display (string-append "build-joltc: wrote " jb-out "\n"))

host/chez/build-smoke.sh

@@ -94,28 +94,6 @@ for frame in 'app.util/deep-boom' 'app.util/mid-boom' 'app.core/-main'; do
     exit 1
   fi
 done
-# A built binary runs -main with *ns* = user, like clojure.main — so a runtime
-# resolve of an aliased symbol is nil (the alias lives in the entry ns, not user),
-# matching the JVM and interpreted joltc rather than the entry ns's alias table. A
-# separate app: `resolve` defeats tree-shaking, so keep it out of the shake test's
-# app above.
-nsp="$(dirname "$out")/nsparity"
-mkdir -p "$nsp/src/nsp"
-printf '{:paths ["src"]}\n' > "$nsp/deps.edn"
-printf '(ns nsp.lib)\n(defn thing [] 1)\n' > "$nsp/src/nsp/lib.clj"
-printf '(ns nsp.main (:require [nsp.lib :as l]))\n(defn -main [& _]\n  (println "ns:" (str *ns*))\n  (println "resolve:" (pr-str (resolve (quote l/thing))))\n  (println "ns-resolve:" (pr-str (ns-resolve (quote nsp.lib) (quote thing)))))\n' > "$nsp/src/nsp/main.clj"
-nspout="$(dirname "$out")/nsparity-bin"
-if ! JOLT_PWD="$nsp" bin/joltc build -m nsp.main -o "$nspout" >/dev/null 2>&1; then
-  echo "  FAIL: jolt build of the ns-parity app exited non-zero"; exit 1
-fi
-nsp_out="$(cd / && "$nspout" 2>&1)"
-if ! printf '%s' "$nsp_out" | grep -q 'ns: user' \
-   || ! printf '%s' "$nsp_out" | grep -q '^resolve: nil' \
-   || ! printf '%s' "$nsp_out" | grep -q "ns-resolve: #'nsp.lib/thing"; then
-  echo "  FAIL: built binary -main ns parity — want 'ns: user', 'resolve: nil', ns-resolve found"
-  echo "--- got ----"; echo "$nsp_out"
-  exit 1
-fi
 # Tree-shaking (opt-in): same result, and an unreachable def (the `twice` macro,
 # expanded at AOT and never called at runtime) is dropped.
 if ! JOLT_PWD="$app" bin/joltc build -m app.core -o "$out" --tree-shake >/dev/null 2>&1; then
@@ -151,20 +129,4 @@ if [ "$got_dr" != "42" ]; then
   echo "  FAIL: built #code data reader — want 42, got \`$got_dr\`"; exit 1
 fi
 
-# A script namespace with no -main (just top-level side effects) must build and
+echo "build smoke: passed (release + optimized + direct-link + tree-shake + compiler+core shake + data-reader)"
-# run its top-level forms, then exit cleanly — not crash calling a nil -main.
-nomain="$(dirname "$out")/nomain"
-mkdir -p "$nomain/src"
-printf '{:paths ["src"]}\n' > "$nomain/deps.edn"
-printf '(ns script)\n(println "no-main script ran")\n' > "$nomain/src/script.clj"
-nmout="$(dirname "$out")/nomain-bin"
-if ! JOLT_PWD="$nomain" bin/joltc build -m script -o "$nmout" >/dev/null 2>&1; then
-  echo "  FAIL: jolt build of a no-main script exited non-zero"; exit 1
-fi
-got_nm="$(cd / && "$nmout" 2>&1)"; rc_nm=$?
-if [ "$got_nm" != "no-main script ran" ] || [ "$rc_nm" != "0" ]; then
-  echo "  FAIL: no-main script binary — want 'no-main script ran' rc 0, got \`$got_nm\` rc $rc_nm"
-  exit 1
-fi
-
-echo "build smoke: passed (release + optimized + direct-link + tree-shake + compiler+core shake + data-reader + no-main)"

host/chez/build.ss

@@ -23,7 +23,7 @@
 ;; --- shell helpers ----------------------------------------------------------
 ;; Run a command, return its stdout as one trimmed string ("" on no output).
 (define (bld-sh-capture cmd)
-  (let* ((p (process (bld-sh-wrap cmd))) (in (car p)))
+  (let* ((p (process cmd)) (in (car p)))
     (let loop ((acc '()))
       (let ((l (get-line in)))
         (if (eof-object? l)
@@ -37,7 +37,7 @@
             (loop (cons l acc)))))))
 
 (define (bld-system cmd)
-  (let ((rc (system (bld-sh-wrap cmd))))
+  (let ((rc (system cmd)))
     (unless (zero? rc)
       (error 'jolt-build (string-append "command failed (" (number->string rc) "): " cmd)))))
 
@@ -57,24 +57,6 @@
 ;; --- toolchain discovery ----------------------------------------------------
 (define bld-machine (symbol->string (machine-type)))
 (define bld-osx? (bld-contains? bld-machine "osx"))
-(define bld-nt? (bld-contains? bld-machine "nt"))
-
-;; Chez's system/process run through cmd.exe on Windows; every build command
-;; here is written for sh (MSYS2 provides it). On nt, spill the command to a
-;; script and run `sh <file>` — workspace paths carry no spaces, and the
-;; script file sidesteps cmd's quoting entirely. Identity elsewhere.
-(define bld-shell-counter 0)
-(define (bld-sh-wrap cmd)
-  (if bld-nt?
-      (let* ((tmp (or (getenv "TEMP") (getenv "TMP") "."))
-             (f (begin (set! bld-shell-counter (+ bld-shell-counter 1))
-                       (string-append tmp "\\jolt-sh-"
-                                      (number->string bld-shell-counter) ".sh"))))
-        (let ((p (open-output-file f 'replace)))
-          (put-string p cmd)
-          (close-port p))
-        (string-append "sh " f))
-      cmd))
 
 ;; The Chez executable, for the isolated compile pass (see build-binary step 4).
 (define bld-chez
@@ -112,21 +94,14 @@
 
 ;; Link flags. macOS Homebrew layout for the kernel's lz4/zlib/ncurses deps.
 (define (bld-link-libs)
-  (cond
+  (if bld-osx?
-    (bld-osx?
       (let ((lz4 (bld-sh-capture "brew --prefix lz4 2>/dev/null")))
         (string-append
           (if (> (string-length lz4) 0) (string-append "-L" lz4 "/lib ") "")
-         "-llz4 -lz -lncurses -framework Foundation -liconv -lm")))
+          "-llz4 -lz -lncurses -framework Foundation -liconv -lm"))
-    ;; Windows (ta6nt, MinGW-w64 under MSYS2): the Chez kernel pulls in
-    ;; compression, winsock, COM/UUID, and the registry.
-    (bld-nt?
-          ;; -static: a single-file exe (no libwinpthread/libgcc/lz4 DLL deps) —
-     ;; required for a distributable binary and for TLS init consistency.
-     "-static -llz4 -lz -lws2_32 -lrpcrt4 -lole32 -luuid -ladvapi32 -luser32 -lshell32 -lm")
       ;; Linux: the Chez kernel pulls in compression (lz4/z), the expression
       ;; editor (ncurses + terminfo), threads, dlopen, libuuid, and clock_gettime.
-    (else "-llz4 -lz -lncurses -ltinfo -ldl -lm -lpthread -luuid -lrt")))
+      "-llz4 -lz -lncurses -ltinfo -ldl -lm -lpthread -luuid -lrt"))
 
 ;; --- runtime manifest (mirrors host/chez/cli.ss's load order) ---------------
 ;; A line is either literal Scheme text to inline, or a tag whose emission the build
@@ -436,15 +411,7 @@
 ;; direct-link?: opt-in closed-world direct-linking (app->app calls bind directly,
 ;; no runtime redefinition). Off by default in every mode — release stays
 ;; dynamically linked.
-(define (bld-suffix? s suf)
-  (let ((n (string-length s)) (m (string-length suf)))
-    (and (>= n m) (string=? (substring s (- n m) n) suf))))
 (define (build-binary entry-ns out-path mode natives embed-dirs ext-roots direct-link? tree-shake?)
-  ;; Windows executables carry .exe; normalize here so the append-payload and
-  ;; cc paths agree and the shell can run the result.
-  (let ((out-path (if (and bld-nt? (not (bld-suffix? out-path ".exe")))
-                      (string-append out-path ".exe")
-                      out-path)))
   ;; The self-contained path (jolt-embedded-bytes "stub/launcher") needs no csv
   ;; kernel files, no Chez, no cc — only the legacy cc path does.
   (unless (jolt-embedded-bytes "stub/launcher") (bld-check-toolchain))
@@ -571,23 +538,11 @@
                             "))\n"
                             "                (list \"jolt-core\" \"stdlib\"))))\n"))
           (put-string out (string-append
-                            ;; Call -main only if the entry namespace defines one;
+                            "    (let ((mainv (var-deref " (ei-str-lit entry-ns) " \"-main\")))\n"
-                            ;; a script ns (top-level side effects, no -main) has
-                            ;; already run its forms at heap build, so invoking a nil
-                            ;; -main would crash ("nil cannot be cast to IFn") — just
-                            ;; exit cleanly instead.
-                            "    (let ((maincell (var-cell-lookup " (ei-str-lit entry-ns) " \"-main\")))\n"
                             ;; render an uncaught throw (+ Clojure backtrace) instead
                             ;; of Chez's opaque dump, then exit non-zero.
                             "      (guard (v (#t (jolt-report-throwable v (current-error-port)) (exit 1)))\n"
-                            ;; Loading the app left the current ns at the entry ns; reset
+                            "        (apply jolt-invoke mainv args)))\n"
-                            ;; it to `user` before -main, matching clojure.main (*ns* is
-                            ;; `user` when a `-m` -main runs, so a runtime resolve of an
-                            ;; aliased symbol behaves the same as on the JVM / interpreted
-                            ;; joltc, not off the entry ns's alias table).
-                            "        (set-chez-ns! \"user\")\n"
-                            "        (when (and maincell (var-cell-defined? maincell))\n"
-                            "          (apply jolt-invoke (var-cell-root maincell) args))))\n"
                             "    (exit 0)))\n"))
           (close-port out))
         ;; 4. compile -> boot -> link. Two paths, chosen by whether this process
@@ -603,7 +558,7 @@
             (build-self-contained entry-ns out-path mode builddir flat-ss flat-so boot
                                   (bld-native-link-flags natives))
             (build-with-cc entry-ns out-path mode builddir flat-ss flat-so boot boot-h main-c
-                           (bld-native-link-flags natives)))))))))
+                           (bld-native-link-flags natives))))))))
 
 ;; --- self-contained link (in-process compile + append the boot to the stub) ---
 ;; compile-file runs against the DEFAULT interaction environment, so the boot's

host/chez/cli.ss

@@ -11,26 +11,6 @@
 
 (define cli-args (cdr (command-line)))   ; drop the script name
 
-;; Fail early and actionably when the vendored submodules aren't checked out —
-;; a plain `git clone` or GitHub's auto-generated "Source code" release archive
-;; lacks them, and the raw failure ("load failed for vendor/irregex/irregex.scm")
-;; doesn't say how to fix it. (The self-contained joltc binary embeds these and
-;; never runs this file.)
-(unless (file-exists? "vendor/irregex/irregex.scm")
-  (display "jolt: vendor submodules are missing (vendor/irregex).
-" (current-error-port))
-  (display "GitHub's 'Source code' release archives don't include submodules.
-" (current-error-port))
-  (display "Clone the repo instead:
-" (current-error-port))
-  (display "  git clone --recurse-submodules https://github.com/jolt-lang/jolt.git
-" (current-error-port))
-  (display "or, in an existing checkout:
-" (current-error-port))
-  (display "  git submodule update --init --recursive
-" (current-error-port))
-  (exit 1))
-
 (load "host/chez/rt.ss")
 (set-chez-ns! "clojure.core")
 (load "host/chez/seed/prelude.ss")
@@ -66,9 +46,6 @@
       (when bt (display "  trace:\n" port) (display bt port)))
     (exit 1)))
 
-;; JOLT_TRACE opt-in, at runtime (before any app ns compiles) so the app is traced.
-(jolt-trace-init-from-env!)
-
 (guard (v (#t (jolt-report-uncaught v)))
   (cond
     ;; -e EXPR — evaluate one expression and print it (blank for nil). Wrapped in

host/chez/collections.ss

@@ -298,21 +298,8 @@
 (define empty-pmap-hash (make-pmap empty-hnode 0 #f))      ; hash-order backing (sets)
 (define pmap-absent (list 'absent))    ; unique missing-key sentinel
 ;; PersistentArrayMap threshold: assoc of a new key promotes to hash mode once the
-;; map already holds 8 entries (array.length >= 16 in the reference). Clojure 1.13
+;; map already holds 8 entries (array.length >= 16 in the reference).
-;; raised the limit to 64 for maps whose keys are ALL keywords (the common
-;; keyword-map case); mixed-key maps still cap at 8.
 (define array-map-limit 8)
-(define array-map-limit-kw 64)
-(define (all-keywords? ks)
-  (or (null? ks) (and (keyword? (car ks)) (all-keywords? (cdr ks)))))
-;; Should a map of `cnt` entries with insertion order `ord` stay in array mode
-;; when key `k` is added? Under 8 always; a keyword-only map (existing keys + the
-;; new key all keywords) grows to 64; otherwise it caps at 8.
-(define (pmap-array-keep? cnt ord k)
-  (cond ((fx<? cnt array-map-limit) #t)
-        ((fx>=? cnt array-map-limit-kw) #f)
-        ((and (keyword? k) (all-keywords? ord)) #t)
-        (else #f)))
 (define (append-key ord k) (append ord (list k)))
 (define (remove-key ord k) (let loop ((o ord)) (cond ((null? o) '()) ((jolt= (car o) k) (cdr o)) (else (cons (car o) (loop (cdr o)))))))
 
@@ -323,7 +310,7 @@
   (let* ((added (box #f)) (r (node-assoc (pmap-root m) 0 (key-hash k) k v added))
          (cnt (pmap-cnt m)) (ord (pmap-order m)))
     (if (unbox added)
-        (if (and ord (pmap-array-keep? cnt ord k))
+        (if (and ord (fx<? cnt array-map-limit))
             (make-pmap r (fx+ cnt 1) (append-key ord k))
             (make-pmap r (fx+ cnt 1) #f))
         (make-pmap r cnt ord))))
@@ -365,14 +352,10 @@
         (let loop ((ks ord) (a acc))
           (if (null? ks) a (loop (cdr ks) (proc (car ks) (pmap-get m (car ks) jolt-nil) a))))
         (node-fold (pmap-root m) proc acc))))
-;; map LITERAL ({...}): array map up to 8 entries (64 if keyword-only, per 1.13),
+;; map LITERAL ({...}): array map up to 8 entries, hash map beyond (RT.map).
-;; hash map beyond (RT.map).
 (define (jolt-hash-map . kvs)
   (let loop ((m empty-pmap) (kvs kvs))
-    (cond ((null? kvs)
+    (cond ((null? kvs) (if (fx>? (pmap-cnt m) array-map-limit) (pmap->hash m) m))
-           (let ((cnt (pmap-cnt m)) (ord (pmap-order m)))
-             (if (fx>? cnt (if (all-keywords? ord) array-map-limit-kw array-map-limit))
-                 (pmap->hash m) m)))
           ((null? (cdr kvs)) (error 'hash-map "odd number of map literal entries"))
           (else (loop (pmap-put-ordered m (car kvs) (cadr kvs)) (cddr kvs))))))
 ;; array-map ctor: insertion-ordered regardless of size (createAsIfByAssoc).
@@ -421,11 +404,9 @@
   (if (null? args)
       (jolt-vector)
       (let ((coll (car args)) (xs (cdr args)))
-        (cond
+        (if (jolt-nil? coll)
-          ;; 1-arity returns the coll untouched — (conj nil) is nil
+            (fold-left jolt-conj1 jolt-empty-list xs)
-          ((null? xs) coll)
+            (meta-carry coll (fold-left jolt-conj1 coll xs))))))
-          ((jolt-nil? coll) (fold-left jolt-conj1 jolt-empty-list xs))
-          (else (meta-carry coll (fold-left jolt-conj1 coll xs)))))))
 
 ;; A host shim registers a type's get via register-get-arm! (handler: (coll k d) ->
 ;; value) instead of set!-wrapping jolt-get — disjoint coll types, checked before the
@@ -462,16 +443,11 @@
 (define (rec-coll-method coll name)
   (and (jrec? coll) (find-method-any-protocol (jrec-tag coll) name)))
 
-(define (jolt-nth-nil-idx! i)
-  (when (jolt-nil? i)
-    (jolt-throw (jolt-host-throwable "java.lang.NullPointerException" "nth index"))))
 (define jolt-nth
   (case-lambda
     ((coll i)
-     (jolt-nth-nil-idx! i)
      (let ((i (->idx i)))
-       (cond ((jolt-nil? coll) jolt-nil)          ; RT.nth(nil, i) is nil at any index
+       (cond ((pvec? coll) (let ((v (pvec-v coll)))
-             ((pvec? coll) (let ((v (pvec-v coll)))
                              (if (and (fx>=? i 0) (fx<? i (vector-length v))) (vector-ref v i)
                                  (jolt-throw (jolt-host-throwable "java.lang.IndexOutOfBoundsException" "index out of bounds")))))
              ((string? coll) (if (and (fx>=? i 0) (fx<? i (string-length coll))) (string-ref coll i)
@@ -480,10 +456,8 @@
              ((rec-coll-method coll "nth") => (lambda (m) (jolt-invoke m coll i)))
              (else (error 'nth "unsupported collection")))))
     ((coll i d)
-     (jolt-nth-nil-idx! i)
      (let ((i (->idx i)))
-       (cond ((jolt-nil? coll) d)                 ; RT.nth(nil, i, notFound) is notFound
+       (cond ((pvec? coll) (pvec-nth-d coll i d))
-             ((pvec? coll) (pvec-nth-d coll i d))
              ((string? coll) (if (and (fx>=? i 0) (fx<? i (string-length coll))) (string-ref coll i) d))
              ((or (cseq? coll) (empty-list-t? coll)) (seq-nth coll i #t d))
              ((rec-coll-method coll "nth") => (lambda (m) (jolt-invoke m coll i d)))
@@ -528,21 +502,6 @@
         ((pset? coll) (pset-contains? coll k))
         ((pvec? coll) (let ((k (->idx k))) (and (fixnum? k) (fx>=? k 0) (fx<? k (pvec-count coll)))))
         ((jolt-nil? coll) #f)
-        ;; a string supports contains? by INDEX only (RT.contains: CharSequence +
-        ;; Number key); any other key — or any unsupported type — is the JVM's
-        ;; IllegalArgumentException.
-        ((string? coll)
-         (if (and (number? k) (exact? k) (integer? k))
-             (and (>= k 0) (< k (string-length coll)))
-             (jolt-throw (jolt-host-throwable
-                          "java.lang.IllegalArgumentException"
-                          "contains? not supported on type: java.lang.String"))))
-        ((or (cseq? coll) (empty-list-t? coll) (number? coll) (boolean? coll)
-             (keyword? coll) (jolt-symbol? coll) (char? coll))
-         (jolt-throw (jolt-host-throwable
-                      "java.lang.IllegalArgumentException"
-                      (string-append "contains? not supported on type: "
-                                     (guard (e (#t "?")) (jolt-class-name coll))))))
         (else #f)))
 
 (define (jolt-empty? coll)
@@ -555,25 +514,15 @@
         ((cseq? coll) #f)                            ; a cseq is non-empty by construction
         (else (error 'empty? "unsupported collection"))))
 
-(define (jolt-stack-throw coll)
-  (jolt-throw (jolt-host-throwable
-               "java.lang.ClassCastException"
-               (string-append "class " (guard (e (#t "?")) (jolt-class-name coll))
-                              " cannot be cast to class clojure.lang.IPersistentStack"))))
 (define (jolt-peek coll)
   (cond ((pvec? coll) (pvec-peek coll))
-        ;; list peek = first; a non-list seq (range, a rest chain) is not an
+        ((or (cseq? coll) (empty-list-t? coll)) (jolt-first coll))   ; list peek = first
-        ;; IPersistentStack on the JVM
+        ((jolt-nil? coll) jolt-nil) (else (error 'peek "unsupported collection"))))
-        ((and (cseq? coll) (cseq-list? coll)) (jolt-first coll))
-        ((empty-list-t? coll) (jolt-first coll))
-        ((jolt-nil? coll) jolt-nil)
-        (else (jolt-stack-throw coll))))
 (define (jolt-pop coll)
-  (cond ((jolt-nil? coll) jolt-nil)                                 ; RT.pop(nil) is nil
+  (cond ((pvec? coll) (meta-carry coll (pvec-pop coll)))
-        ((pvec? coll) (meta-carry coll (pvec-pop coll)))
+        ((cseq? coll) (meta-carry coll (jolt-rest coll)))            ; list pop = rest
-        ((and (cseq? coll) (cseq-list? coll)) (meta-carry coll (jolt-rest coll)))
         ((empty-list-t? coll) (error 'pop "can't pop empty list"))
-        (else (jolt-stack-throw coll))))
+        (else (error 'pop "unsupported collection"))))
 
 ;; ============================================================================
 ;; equality / hash hooks called from values.ss (jolt=2 / jolt-hash)

host/chez/compile-eval.ss

@@ -110,38 +110,6 @@
 ;; older seed during the first re-mint pass.
 (let ((scv (var-deref "jolt.backend-scheme" "set-var-cache!")))
   (when (procedure? scv) (scv #t)))
-;; JOLT_TRACE is a falsey value (case-insensitive) — the single predicate both the
-;; dev-mode enable and the whole-run enable consult, so "off" never accidentally
-;; means "on". An empty / unset value is NOT falsey here — it carries no signal, so
-;; dev mode still traces and a whole run still doesn't.
-(define (jolt-trace-env-off? e)
-  (and (string? e)
-       (let ((s (string-downcase e)))
-         (or (string=? s "0") (string=? s "false") (string=? s "no")
-             (string=? s "off") (string=? s "n")))))
-;; Tail-frame history. Turning it on makes the emitter add a per-fn history push to
-;; every fn compiled AFTERWARD, and allocates this thread's ring. Suppressed when
-;; JOLT_TRACE is a falsey value, so JOLT_TRACE=0 / off / no disables it in dev mode.
-(define (jolt-enable-trace!)
-  (unless (jolt-trace-env-off? (getenv "JOLT_TRACE"))
-    (let ((stf (var-deref "jolt.backend-scheme" "set-trace-frames!")))
-      (when (procedure? stf) (stf #t)))
-    (jolt-trace-enable!)))
-;; Exposed so the REPL / nREPL entrypoints (jolt.main, jolt.nrepl) can turn tracing
-;; on for REPL-driven development without the user setting JOLT_TRACE. Because the
-;; push is baked in at compile time, only code compiled after this call is traced —
-;; which is exactly the code you eval / reload in a live session.
-(def-var! "jolt.host" "enable-trace!" jolt-enable-trace!)
-;; Explicit opt-in for a whole run (JOLT_TRACE=1): turn tracing on BEFORE any app
-;; namespace is compiled, so a plain `-M:run` traces the app's own code too. Called
-;; from the runtime entrypoints (cli.ss, and the built joltc launcher) — NOT at load
-;; time: a built joltc runs top-level forms at heap-build time, where JOLT_TRACE is
-;; always unset, so a load-time check would never see the user's runtime env. Only an
-;; affirmative value (set, non-empty, not falsey) forces it on.
-(define (jolt-trace-init-from-env!)
-  (let ((e (getenv "JOLT_TRACE")))
-    (when (and e (fx>? (string-length e) 0) (not (jolt-trace-env-off? e)))
-      (jolt-enable-trace!))))
 
 ;; (with-meta sym m) -> sym, else x — an (ns ^:no-doc name …) yields the name with
 ;; reader metadata as a with-meta form; strip it to read the bare ns symbol.
@@ -243,13 +211,7 @@
 ;; A top-level (do ...) is UNROLLED — each subform compiled+eval'd in turn, like
 ;; Clojure's top-level do — so a runtime defmacro/def in an earlier subform is
 ;; visible (macro flag set, var interned) before a later subform is analyzed.
-;; a non-form VALUE (a function object, a BigDecimal, a reference type)
-;; self-evaluates, like eval on the JVM.
 (define (jolt-compile-eval-form form ns)
-  (if (or (procedure? form) (jbigdec? form) (jolt-atom? form) (jolt-multifn? form))
-      form
-      (jolt-compile-eval-form* form ns)))
-(define (jolt-compile-eval-form* form ns)
   (cond
     ;; thread the current ns: an earlier subform may switch it (ns/in-ns call
     ;; set-chez-ns!), and the next subform must be ANALYZED in that ns so its defs
@@ -267,9 +229,6 @@
      ;; record this form's source location first, so a compile- or run-time error
      ;; in it reports the right place.
      (jolt-enter-form! form)
-     ;; drop tail-frame history from earlier top-level forms, so an error's trace
-     ;; shows only this form's own call history (a no-op unless JOLT_TRACE is on).
-     (jolt-trace-reset!)
      (eval (read (open-input-string (jolt-analyze-emit-form form ns)))
            (interaction-environment)))))
 

host/chez/converters.ss

@@ -117,21 +117,20 @@
      (let ((a (car args)))
        (cond
          ((jolt-symbol? a) a)
-         ;; (symbol "ns/name") splits the namespace at the FIRST "/" (JVM
+         ;; (symbol "ns/name") splits the namespace at the LAST "/" (JVM
-         ;; Symbol.intern), so (namespace (symbol "foo/bar/baz")) => "foo" with
+         ;; Symbol.intern), so (namespace (symbol "foo/bar")) => "foo". A lone "/"
-         ;; name "bar/baz". A lone "/" or a leading slash has no namespace. The
+         ;; or a leading slash has no namespace. The no-ns sentinel is #f — matches
-         ;; no-ns sentinel is #f — matches emit's quoted-symbol lowering
+         ;; emit's quoted-symbol lowering (jolt-symbol #f "x"), so (= 'x (symbol
-         ;; (jolt-symbol #f "x"), so (= 'x (symbol "x")) holds (jolt= compares
+         ;; "x")) holds (jolt= compares ns with strict equal?).
-         ;; ns with strict equal?).
          ((string? a)
           (let ((slen (string-length a)))
             (if (string=? a "/")
                 (jolt-symbol #f "/")
-                (let loop ((i 1))
+                (let loop ((i (- slen 1)))
-                  (cond ((>= i slen) (jolt-symbol #f a))
+                  (cond ((<= i 0) (jolt-symbol #f a))
                         ((char=? (string-ref a i) #\/)
                          (jolt-symbol (substring a 0 i) (substring a (+ i 1) slen)))
-                        (else (loop (+ i 1))))))))
+                        (else (loop (- i 1))))))))
          ((keyword? a) (jolt-symbol (keyword-t-ns a) (keyword-t-name a)))
          ;; (symbol a-var) -> the var's qualified symbol (clojure.spec.alpha/->sym).
          ((var-cell? a) (jolt-symbol (var-cell-ns a) (var-cell-name a)))
@@ -178,11 +177,7 @@
     ((jolt-nil? b) 1)
     ((and (number? a) (number? b)) (jolt-cmp3 a b))
     ((and (string? a) (string? b)) (jolt-strcmp a b))
-    ;; keywords order like symbols: a nil namespace sorts before any namespace,
+    ((and (keyword? a) (keyword? b)) (jolt-strcmp (jolt-kw->string a) (jolt-kw->string b)))
-    ;; then by namespace, then by name (Keyword.compareTo -> Symbol.compareTo)
-    ((and (keyword? a) (keyword? b))
-     (let ((r (jolt-strcmp (or (keyword-t-ns a) "") (or (keyword-t-ns b) ""))))
-       (if (= r 0) (jolt-strcmp (keyword-t-name a) (keyword-t-name b)) r)))
     ((and (jolt-symbol? a) (jolt-symbol? b))
      (let ((r (jolt-strcmp (jolt-sym-ns-string a) (jolt-sym-ns-string b))))
        (if (= r 0) (jolt-strcmp (symbol-t-name a) (symbol-t-name b)) r)))
@@ -273,16 +268,4 @@
         (jolt-cast-range-throw "float" x)
         d)))
 (def-var! "clojure.core" "float" jolt-float)
-;; numerator/denominator: jolt ratios are Chez exact rationals; a non-ratio is
-;; the JVM's Ratio cast failure.
-(define (jolt-ratio-part name f)
-  (lambda (x)
-    (if (and (number? x) (exact? x) (rational? x) (not (integer? x)))
-        (f x)
-        (jolt-throw (jolt-host-throwable
-                     "java.lang.ClassCastException"
-                     (string-append "class " (guard (e (#t "?")) (jolt-class-name x))
-                                    " cannot be cast to class clojure.lang.Ratio"))))))
-(def-var! "clojure.core" "numerator" (jolt-ratio-part "numerator" numerator))
-(def-var! "clojure.core" "denominator" (jolt-ratio-part "denominator" denominator))
 (def-var! "clojure.core" "compare" jolt-compare)

host/chez/emit-image.ss

@@ -46,10 +46,6 @@
 ;; after it). Guarded for the first re-mint pass off an older seed.
 (let ((scv (var-deref "jolt.backend-scheme" "set-var-cache!")))
   (when (procedure? scv) (scv #f)))
-;; Tail-frame tracing off for the mint + `jolt build`: the seed must stay a
-;; byte-fixpoint, and a built app should carry no per-call trace overhead.
-(let ((stf (var-deref "jolt.backend-scheme" "set-trace-frames!")))
-  (when (procedure? stf) (stf #f)))
 (define (ei-compile-form ctx f optimize?)
   (let ((ir (jolt-ce-analyze ctx f)))
     (jolt-ce-emit-top (if optimize? (jolt-ce-run-passes ir ctx) ir))))

host/chez/java/bigdec.ss

@@ -334,11 +334,6 @@
 (set! jolt-zero? (let ((prev jolt-zero?)) (lambda (x) (if (jbigdec? x) (jbd-zero? x) (prev x)))))
 (set! jolt-pos? (let ((prev jolt-pos?)) (lambda (x) (if (jbigdec? x) (jbd-pos? x) (prev x)))))
 (set! jolt-neg? (let ((prev jolt-neg?)) (lambda (x) (if (jbigdec? x) (jbd-neg? x) (prev x)))))
-;; a BigDecimal IS a number (java.lang.Number): extend the number? native so the
-;; predicate — and everything defined over it (num, =='s guard) — accepts it.
-;; The compiled fast paths test Chez number? directly and are unaffected.
-(set! jolt-number? (let ((prev jolt-number?)) (lambda (x) (if (jbigdec? x) #t (prev x)))))
-(def-var! "clojure.core" "number?" jolt-number?)
 (def-var! "clojure.core" "inc" jolt-inc)
 (def-var! "clojure.core" "dec" jolt-dec)
 (def-var! "clojure.core" "zero?" jolt-zero?)

host/chez/java/concurrency.ss

@@ -579,9 +579,9 @@
 ;; pthread_sigmask"). Guard so a non-POSIX host yields #f; jolt-set-sigint-blocked
 ;; then no-ops (Windows delivers ^C through the console, not a per-thread mask).
 (define c-pthread-sigmask
-  (jolt-foreign-proc-safe "pthread_sigmask" '(int u8* u8*) 'int))
+  (guard (e (#t #f)) (foreign-procedure "pthread_sigmask" (int u8* u8*) int)))
-(define c-sigemptyset (jolt-foreign-proc-safe "sigemptyset" '(u8*) 'int))
+(define c-sigemptyset (guard (e (#t #f)) (foreign-procedure "sigemptyset" (u8*) int)))
-(define c-sigaddset (jolt-foreign-proc-safe "sigaddset" '(u8* int) 'int))
+(define c-sigaddset (guard (e (#t #f)) (foreign-procedure "sigaddset" (u8* int) int)))
 ;; POSIX SIG_BLOCK/SIG_UNBLOCK numerics differ by platform: Linux/glibc 0/1,
 ;; Darwin/macOS 1/2 (SIG_UNBLOCK is SIG_BLOCK+1 on both). Resolve SIG_BLOCK for
 ;; this host from the machine-type symbol — macOS builds contain "osx".

host/chez/java/host-static-methods.ss

@@ -55,7 +55,9 @@
     (lambda ()
       (unless tried?
         (set! tried? #t)
-        (set! fp (jolt-foreign-proc-safe "sched_yield" '() 'int)))
+        (set! fp (guard (e (#t #f))
+                   (load-shared-object #f)
+                   (foreign-procedure "sched_yield" () int))))
       (if fp (fp) (sleep (make-time 'time-duration 0 0)))
       jolt-nil)))
 

host/chez/java/io.ss

@@ -80,18 +80,13 @@
 ;; every Chez binary) — no external toolchain. Falls back to /bin/sh chmod if the
 ;; symbol can't be resolved.
 (define jolt-chmod-755
-  (let ((c (jolt-foreign-proc-safe "chmod" '(string int) 'int)))
+  (let ((c (guard (e (#t #f))
+             (load-shared-object #f)
+             (foreign-procedure "chmod" (string int) int))))
     (lambda (path)
-      (cond
+      (if c
-        (c (c path #o755))
+          (c path #o755)
-        ;; Windows has no chmod and needs none (execute is by extension)
+          (system (string-append "chmod 755 '" path "'"))))))
-        ((let ((m (symbol->string (machine-type))))
-           (let loop ((i 0))
-             (cond ((> (+ i 2) (string-length m)) #f)
-                   ((string=? (substring m i (+ i 2)) "nt") #t)
-                   (else (loop (+ i 1))))))
-         0)
-        (else (system (string-append "chmod 755 '" path "'")))))))
 
 ;; A user-facing relative path resolves against JOLT_PWD — the user's cwd before
 ;; the launcher cd'd to the jolt repo root — matching the JVM, where io/file is

host/chez/java/natives-array.ss

@@ -115,11 +115,10 @@
                  (let ((v (jolt-array-vec c)) (j (exact (na-idx i))))
                    (if (and (>= j 0) (< j (vector-length v))) (vector-ref v j) d))
                  (%na-nth c i d)))))
-(def-var! "jolt.host" "array-value?" (lambda (x) (if (jolt-array? x) #t jolt-nil)))
 (define %na-get jolt-get)
 (set! jolt-get
   (case-lambda
-    ((c k)   (if (jolt-array? c) (jolt-nth c k jolt-nil) (%na-get c k)))
+    ((c k)   (if (jolt-array? c) (jolt-nth c k) (%na-get c k)))
     ((c k d) (if (jolt-array? c) (jolt-nth c k d) (%na-get c k d)))))
 ;; aset (overlay) writes through jolt.host/ref-put! — mutate the slot, return arr.
 ;; count/nth/seq/get above are NATIVE-OPS (inlined at call sites), so aget/alength/

host/chez/joltc-selfbuild-smoke.sh

@@ -42,20 +42,6 @@ if [ "$got_e" != "45" ]; then
   exit 1
 fi
 
-# 2b. JOLT_TRACE must take effect in the BUILT binary. The env check runs at
-# runtime (the launcher), NOT at heap-build where JOLT_TRACE is always unset — so
-# an uncaught error shows a tail-frame trace recovering the TCO-elided chain, and
-# exactly ONE trace block (the launcher must not double-print it).
-got_tr="$(env -i HOME="$HOME" JOLT_TRACE=1 "$joltc" -e '(defn a [x] (+ x 1)) (defn b [x] (a x)) (b :x)' 2>&1)"
-if ! printf '%s' "$got_tr" | grep -q '  trace:' || ! printf '%s' "$got_tr" | grep -q 'b'; then
-  echo "  FAIL: JOLT_TRACE=1 in the built joltc produced no tail-frame trace"
-  echo "--- got ---"; echo "$got_tr"; exit 1
-fi
-if [ "$(printf '%s' "$got_tr" | grep -c '  trace:')" != "1" ]; then
-  echo "  FAIL: built joltc double-printed the trace block"
-  echo "--- got ---"; echo "$got_tr"; exit 1
-fi
-
 # 3. Build an app through the distributed joltc with an EMPTY environment — no
 # PATH at all, so no chez, no cc, no shell tools are reachable. This is the core
 # guarantee: joltc compiles apps entirely on its own.

host/chez/loader.ss

@@ -384,14 +384,3 @@
 (def-var! "jolt.host" "load-namespace" (lambda (n) (load-namespace n) jolt-nil))
 (def-var! "jolt.host" "file-exists?" (lambda (p) (if (file-exists? p) #t #f)))
 (def-var! "jolt.host" "getenv" (lambda (n) (let ((v (getenv n))) (if v v jolt-nil))))
-
-;; jolt version string. A self-contained binary build bakes the real tag into the
-;; saved heap by emitting (set! jolt-baked-version "…") in flat.ss; a dev run off
-;; the seed leaves it #f and falls back to $JOLT_VERSION (bin/joltc sets it from
-;; `git describe`), then "dev".
-(define jolt-baked-version #f)
-(def-var! "jolt.host" "jolt-version"
-  (lambda ()
-    (or jolt-baked-version
-        (let ((v (getenv "JOLT_VERSION"))) (and v (> (string-length v) 0) v))
-        "dev")))

host/chez/ns.ss

@@ -260,9 +260,6 @@
 ;; intern: create/set a var ns/sym to val (or an unbound cell). Returns the var.
 (define (jolt-intern ns-desig sym . vopt)
   (let ((nm (ns-desig->name ns-desig)) (s (symbol-t-name sym)))
-    ;; the namespace must exist (Namespace.find), like the JVM's intern
-    (unless (hashtable-ref ns-registry nm #f)
-      (jolt-throw (jolt-ex-info (string-append "No namespace: " nm " found") empty-pmap)))
     (if (pair? vopt) (def-var! nm s (car vopt)) (declare-var! nm s))))
 
 ;; alias / ns-unalias: register/drop an :as alias under the current (or given) ns.

host/chez/post-prelude.ss

@@ -67,13 +67,8 @@
         ;; chain is a cseq under jolt's seq model, and (realized? (rest s)) after
         ;; a next must be true like the JVM's realized LazySeq — never a throw
         ;; whose message renders the (possibly infinite) seq.
-        ;; a PLAIN seq (list/cons/range — not a lazy-seq wrapper) is not an
+        ((cseq? x) (if (cseq-forced? x) #t #f))
-        ;; IPending on the JVM: realized? throws.
+        ((empty-list-t? x) #t)
-        ((or (cseq? x) (empty-list-t? x))
-         (jolt-throw (jolt-host-throwable
-                      "java.lang.ClassCastException"
-                      (string-append "class " (guard (e (#t "?")) (jolt-class-name x))
-                                     " cannot be cast to class clojure.lang.IPending"))))
         (else (jolt-invoke overlay-realized? x))))))
 ;; clojure.edn/read over a reader: drain the jhost reader, then read through the
 ;; overlay read-string so the opts map (:readers/:default/:eof) is honored.

host/chez/reader.ss

@@ -48,24 +48,12 @@
 
 (define (rdr-digit? c) (and (char>=? c #\0) (char<=? c #\9)))
 (define (rdr-octal? c) (and (char>=? c #\0) (char<=? c #\7)))
-(define (rdr-all-digits? s from to)
-  (and (> to from)
-       (let loop ((i from))
-         (cond ((>= i to) #t)
-               ((rdr-digit? (string-ref s i)) (loop (+ i 1)))
-               (else #f)))))
 ;; every char of s in [from,to) is an octal digit (and the span is non-empty).
 (define (rdr-all-octal? s from to)
   (and (fx<? from to)
        (let loop ((i from)) (cond ((fx=? i to) #t) ((rdr-octal? (string-ref s i)) (loop (fx+ i 1))) (else #f)))))
 
 ;; Advance past whitespace, commas, and ;-to-end-of-line comments.
-;; EDN strict mode (clojure.edn): auto-resolved keywords are invalid, and each
-;; discarded (#_) form is handed to rdr-discard-cb so the edn layer validates
-;; its tagged elements through :readers/:default like the JVM.
-(define rdr-edn-mode (make-parameter #f))
-(define rdr-discard-cb (make-parameter #f))
-
 (define (rdr-skip-ws s i end)
   (let loop ((i i))
     (cond
@@ -73,8 +61,7 @@
       ((rdr-ws? (string-ref s i)) (loop (+ i 1)))
       ((char=? (string-ref s i) #\;)
        (let eol ((j (+ i 1)))
-         (if (or (>= j end) (char=? (string-ref s j) #\newline)
+         (if (or (>= j end) (char=? (string-ref s j) #\newline))
-                 (char=? (string-ref s j) #\return))
              (loop j)
              (eol (+ j 1)))))
       (else i))))
@@ -128,17 +115,12 @@
          (slash (rdr-string-index-char body #\/)))
     (cond
       ;; ratio a/b -> exact rational (= JVM Ratio); reduces to an exact integer
-      ;; when d divides n. Both parts must be plain digit runs (1/-1 is an
+      ;; when d divides n.
-      ;; invalid token); a zero denominator is the JVM's divide error.
       (slash
-       (let ((ns (substring body 0 slash))
+       (let ((n (string->number (substring body 0 slash)))
-             (ds (substring body (+ slash 1) blen)))
+             (d (string->number (substring body (+ slash 1) blen))))
-         (and (rdr-all-digits? ns 0 (string-length ns))
+         (and (integer? n) (integer? d) (not (= d 0))
-              (rdr-all-digits? ds 0 (string-length ds))
+              (* sign (/ n d)))))
-              (let ((n (string->number ns)) (d (string->number ds)))
-                (when (= d 0)
-                  (jolt-throw (jolt-host-throwable "java.lang.ArithmeticException" "Divide by zero")))
-                (* sign (/ n d))))))
       ;; hex 0x..
       ((and (>= blen 2) (char=? (string-ref body 0) #\0)
             (or (char=? (string-ref body 1) #\x) (char=? (string-ref body 1) #\X)))
@@ -157,11 +139,6 @@
       ;; elsewhere or fall through (a non-octal digit fails rdr-all-octal?).
       ((and (>= blen 2) (char=? (string-ref body 0) #\0) (rdr-all-octal? body 1 blen))
        (let ((o (rdr-parse-radix (substring body 1 blen) 8))) (and o (* sign o))))
-      ;; a leading zero on a plain multi-digit integer is invalid (the octal
-      ;; branch above accepted real octals; 08/09 match the JVM's trailing
-      ;; "invalid number" alternative)
-      ((and (>= blen 2) (char=? (string-ref body 0) #\0) (rdr-all-digits? body 1 blen))
-       #f)
       ;; bigint suffix N
       ((and (> blen 1) (char=? (string-ref body (- blen 1)) #\N))
        (let ((n (string->number (substring body 0 (- blen 1)))))
@@ -213,10 +190,7 @@
               (let oct ((j (+ i 1)) (val 0) (cnt 0))
                 (if (and (fx<? cnt 3) (fx<? j end) (rdr-octal? (string-ref s j)))
                     (oct (fx+ j 1) (fx+ (fx* val 8) (fx- (char->integer (string-ref s j)) 48)) (fx+ cnt 1))
-                    (begin
+                    (loop j (cons (integer->char val) acc)))))
-                      (when (> val 255)
-                        (jolt-throw (jolt-ex-info "Octal escape sequence must be in range [0, 377]" empty-pmap)))
-                      (loop j (cons (integer->char val) acc))))))
              ((#\u)
               (let-values (((cp j) (rdr-hex->int s (+ i 2) 4)))
                 ;; A \u escape is a UTF-16 code unit. jolt chars are Unicode scalars,
@@ -234,8 +208,7 @@
                          (loop j (cons #\xFFFD acc)))))
                   ((and (fx>=? cp #xD800) (fx<=? cp #xDFFF)) (loop j (cons #\xFFFD acc)))
                   (else (loop j (cons (integer->char cp) acc))))))
-             (else (jolt-throw (jolt-ex-info (string-append "Unsupported escape character: \\" (string e))
+             (else (loop (+ i 2) (cons e acc))))))
-                                             empty-pmap))))))
         (else (loop (+ i 1) (cons c acc)))))))
 
 ;; backslash already consumed; read a Clojure character literal.
@@ -267,10 +240,7 @@
     ((char=? (string-ref name 0) #\u)
      (integer->char (string->number (substring name 1 (string-length name)) 16)))
     ((char=? (string-ref name 0) #\o)
-     (let ((v (string->number (substring name 1 (string-length name)) 8)))
+     (integer->char (string->number (substring name 1 (string-length name)) 8)))
-       (when (or (not v) (> v 255))
-         (jolt-throw (jolt-ex-info "Octal escape sequence must be in range [0, 377]" empty-pmap)))
-       (integer->char v)))
     (else (jolt-throw (jolt-ex-info (string-append "Unsupported character: \\" name)
                                     empty-pmap)))))
 
@@ -288,39 +258,14 @@
         (values #f tok)
         (values (substring tok 0 slash) (substring tok (+ slash 1) (string-length tok))))))
 
-(define (rdr-numeric-lead? tok)
-  (let ((len (string-length tok)))
-    (and (> len 0)
-         (let ((c0 (string-ref tok 0)))
-           (or (rdr-digit? c0)
-               (and (or (char=? c0 #\+) (char=? c0 #\-)) (> len 1)
-                    (rdr-digit? (string-ref tok 1))))))))
-(define (rdr-invalid-token tok)
-  (jolt-throw (jolt-host-throwable "java.lang.RuntimeException"
-                                   (string-append "Invalid token: " tok))))
 (define (rdr-token->value tok)
   (let ((n (rdr-try-number tok)))
     (cond
       (n n)
-      ;; a token that starts like a number but doesn't parse as one is an
-      ;; invalid number (1a, 08, 0x2g, 2r2), never a symbol — like the JVM.
-      ((rdr-numeric-lead? tok)
-       (jolt-throw (jolt-host-throwable "java.lang.NumberFormatException"
-                                        (string-append "Invalid number: " tok))))
       ((string=? tok "nil") jolt-nil)
       ((string=? tok "true") #t)
       ((string=? tok "false") #f)
-      (else
+      (else (let-values (((ns name) (rdr-sym-parts tok))) (jolt-symbol ns name))))))
-       (let ((len (string-length tok)))
-         ;; a lone "/" is the division symbol, and "ns//" names it in a
-         ;; namespace (clojure.core//); otherwise a leading or trailing slash
-         ;; leaves an empty ns/name part — an invalid token.
-         (when (and (> len 1)
-                    (or (char=? (string-ref tok 0) #\/)
-                        (and (char=? (string-ref tok (- len 1)) #\/)
-                             (not (and (> len 2) (char=? (string-ref tok (- len 2)) #\/))))))
-           (rdr-invalid-token tok))
-         (let-values (((ns name) (rdr-sym-parts tok))) (jolt-symbol ns name)))))))
 
 ;; --- collections ------------------------------------------------------------
 ;; Read forms until the close delimiter; returns (values reversed?-no list j).
@@ -344,14 +289,6 @@
 ;; sequence in a weak side-table the host contract's form-map-pairs consults.
 (define rdr-map-order (make-weak-eq-hashtable))
 (define (rdr-make-map es)
-  ;; the JVM reader rejects duplicate literal keys before building the map
-  (let dupchk ((kvs es) (seen empty-pset))
-    (when (pair? kvs)
-      (let ((k (car kvs)))
-        (when (jolt-truthy? (jolt-contains? seen k))
-          (jolt-throw (jolt-host-throwable "java.lang.IllegalArgumentException"
-                                           (string-append "Duplicate key: " (jolt-pr-str k)))))
-        (dupchk (cddr kvs) (pset-conj seen k)))))
   (let ((m (apply jolt-hash-map es)))
     (when (pair? es) (hashtable-set! rdr-map-order m es))
     m))
@@ -611,12 +548,8 @@
        (let-values (((src j) (rdr-read-regex s (+ i 1) end)))
          (values (jolt-re-pattern src) j)))
       ((char=? c #\_)                    ; #_ discard the next form
-       (let-values (((d j) (rdr-read-form s (+ i 1) end)))
+       (let-values (((_ j) (rdr-read-form s (+ i 1) end)))
-         (when (rdr-eof? d) (jolt-throw (jolt-ex-info "EOF after #_" empty-pmap)))
+         (when (rdr-eof? _) (jolt-throw (jolt-ex-info "EOF after #_" empty-pmap)))
-         ;; edn validates the discarded element (its tags go through the same
-         ;; :readers/:default pipeline; an unreadable one throws)
-         (let ((cb (rdr-discard-cb)))
-           (when cb (jolt-invoke cb d)))
          (rdr-read-form s j end)))
       ((char=? c #\')                    ; #'x var-quote -> (var x)
        (let-values (((form j) (rdr-read-form s (+ i 1) end)))
@@ -668,17 +601,6 @@
   (let ((auto? (and (< i end) (char=? (string-ref s i) #\:))))
     (let ((i (if auto? (+ i 1) i)))
       (let-values (((tok j) (rdr-read-token s i end)))
-        (let ((len (string-length tok)))
-          ;; ":" and "::" alone, a leading or trailing slash (a name of exactly
-          ;; "/" is fine, :ns//), or an auto-resolved keyword in edn (no
-          ;; resolution context) are invalid tokens.
-          (when (or (= len 0)
-                    (and (> len 1) (char=? (string-ref tok 0) #\/))
-                    (and (> len 1) (char=? (string-ref tok (- len 1)) #\/)
-                         (not (and (> len 2) (char=? (string-ref tok (- len 2)) #\/)))))
-            (rdr-invalid-token (string-append (if auto? "::" ":") tok)))
-          (when (and auto? (rdr-edn-mode))
-            (rdr-invalid-token (string-append "::" tok))))
         (let-values (((ns name) (rdr-sym-parts tok)))
           (if auto?
               (let* ((cur (chez-current-ns))
@@ -813,76 +735,15 @@
     (let ((v (var-deref "clojure.core" "*default-data-reader-fn*")))
       (and (not (jolt-nil? v)) (procedure? v) v))))
 
-;; strict #inst validation: RFC-3339 calendar fields must be real (month 1-12,
-;; day valid for the month incl. leap years, hour < 24, minute/second < 60).
-(define (rdr-2dig s i)
-  (and (< (+ i 1) (string-length s))
-       (rdr-digit? (string-ref s i)) (rdr-digit? (string-ref s (+ i 1)))
-       (+ (* 10 (- (char->integer (string-ref s i)) 48))
-          (- (char->integer (string-ref s (+ i 1))) 48))))
-(define (rdr-leap? y) (and (= 0 (modulo y 4)) (or (not (= 0 (modulo y 100))) (= 0 (modulo y 400)))))
-(define (rdr-inst-throw s)
-  (jolt-throw (jolt-host-throwable "java.lang.RuntimeException"
-                                   (string-append "Unrecognized date/time syntax: " s))))
-(define (rdr-validate-inst! s)
-  ;; progressive RFC-3339 like clojure.instant: yyyy[-MM[-dd[Thh[:mm[:ss[.f]]]]]]
-  ;; with an optional Z/±hh:mm offset; each present field must be in range
-  ;; (months 1-12, day valid for the month incl. leap years, hour < 24, min < 60).
-  (let* ((len (string-length s))
-         (y (and (>= len 4) (rdr-all-digits? s 0 4) (string->number (substring s 0 4)))))
-    (unless y (rdr-inst-throw s))
-    (when (>= len 5)
-      (unless (char=? (string-ref s 4) #\-) (rdr-inst-throw s))
-      (let ((mo (rdr-2dig s 5)))
-        (unless (and mo (>= mo 1) (<= mo 12)) (rdr-inst-throw s))
-        (when (>= len 8)
-          (unless (char=? (string-ref s 7) #\-) (rdr-inst-throw s))
-          (let ((d (rdr-2dig s 8)))
-            (unless (and d (>= d 1)
-                         (<= d (vector-ref (if (rdr-leap? y)
-                                               '#(31 29 31 30 31 30 31 31 30 31 30 31)
-                                               '#(31 28 31 30 31 30 31 31 30 31 30 31))
-                                           (- mo 1))))
-              (rdr-inst-throw s))
-            (when (>= len 11)
-              (unless (char=? (string-ref s 10) #\T) (rdr-inst-throw s))
-              (let ((h (rdr-2dig s 11)))
-                (unless (and h (<= h 23)) (rdr-inst-throw s))
-                (when (>= len 14)
-                  (when (char=? (string-ref s 13) #\:)
-                    (let ((mi (rdr-2dig s 14)))
-                      (unless (and mi (<= mi 59)) (rdr-inst-throw s)))))))))))))
-;; strict #uuid: canonical 8-4-4-4-12 hex groups.
-(define (rdr-validate-uuid! s)
-  (define (hexrun? from to)
-    (let loop ((i from))
-      (cond ((>= i to) #t)
-            ((let ((c (char-downcase (string-ref s i))))
-               (or (rdr-digit? c) (and (char>=? c #\a) (char<=? c #\f))))
-             (loop (+ i 1)))
-            (else #f))))
-  (unless (and (= (string-length s) 36)
-               (char=? (string-ref s 8) #\-) (char=? (string-ref s 13) #\-)
-               (char=? (string-ref s 18) #\-) (char=? (string-ref s 23) #\-)
-               (hexrun? 0 8) (hexrun? 9 13) (hexrun? 14 18) (hexrun? 19 23) (hexrun? 24 36))
-    (jolt-throw (jolt-host-throwable "java.lang.IllegalArgumentException"
-                                     (string-append "Invalid UUID string: " s)))))
-
 ;; read-string / read data seam: construct the value for a #tag literal. #inst,
 ;; #uuid and #"regex" are built in; any other tag is applied from *data-readers*,
 ;; then *default-data-reader-fn*. An unregistered tag with no default handler stays
 ;; a tagged FORM (lenient — clojure.edn raises instead).
 (define (rdr-construct-tag tag inner)
   (cond
-    ((eq? tag (keyword #f "#inst"))
+    ((eq? tag (keyword #f "#inst")) (jolt-inst-from-string inner))
-     (when (string? inner) (rdr-validate-inst! inner))
+    ((eq? tag (keyword #f "#uuid")) (jolt-uuid-from-string inner))
-     (jolt-inst-from-string inner))
-    ((eq? tag (keyword #f "#uuid"))
-     (when (string? inner) (rdr-validate-uuid! inner))
-     (jolt-uuid-from-string inner))
     ((eq? tag (keyword #f "regex")) (jolt-re-pattern inner))
-    ;; the M-literal form: construct the BigDecimal from its numeric text
-    ((eq? tag (keyword #f "bigdec")) (jolt-bigdec-from-string inner))
     (else (let ((fn (rdr-data-reader-fn tag)))
             (if fn (jolt-invoke fn inner)
                 (let ((dfn (rdr-default-data-reader-fn)))
@@ -904,11 +765,7 @@
      (let ((items (jolt-get x rdr-kw-value)))
        (let loop ((i 0) (s empty-pset))
          (if (fx>=? i (pvec-count items)) s
-             (let ((v (rdr-form->data (pvec-nth-d items i jolt-nil))))
+             (loop (fx+ i 1) (pset-conj s (rdr-form->data (pvec-nth-d items i jolt-nil))))))))
-               (when (jolt-truthy? (jolt-contains? s v))
-                 (jolt-throw (jolt-host-throwable "java.lang.IllegalArgumentException"
-                                                  (string-append "Duplicate key: " (jolt-pr-str v)))))
-               (loop (fx+ i 1) (pset-conj s v)))))))
     ((pvec? x)
      (let-values (((items changed) (rdr-conv-each (vector->list (pvec-v x)))))
        (if changed (apply jolt-vector items) x)))
@@ -933,35 +790,12 @@
     (if (jolt-nil? m) v (jolt-with-meta v (rdr-form->data m)))))
 
 ;; --- the two host seams -----------------------------------------------------
-;; a top-level read: a stray close delimiter is unmatched (read-seq consumes the
-;; close of an open collection; anything reaching here is unbalanced input).
-(define (rdr-read-top s i end)
-  (let ((k (rdr-skip-ws s i end)))
-    (when (and (< k end)
-               (let ((c (string-ref s k)))
-                 (or (char=? c #\)) (char=? c #\]) (char=? c #\}))))
-      (jolt-throw (jolt-ex-info (string-append "Unmatched delimiter: "
-                                               (string (string-ref s k)))
-                                empty-pmap)))
-    (rdr-read-form s k end)))
-
 ;; clojure.core/read-string: first form, or nil for blank / comment-only input
 ;; (parse-string wart, matched deliberately). jolt-read-form-raw keeps set FORMS
 ;; for the compiler spine (compile-eval); the data seam converts them to sets.
 (define (jolt-read-form-raw s)
-  (let-values (((form j) (rdr-read-top s 0 (string-length s))))
+  (let-values (((form j) (rdr-read-form s 0 (string-length s))))
     (if (rdr-eof? form) jolt-nil form)))
-
-;; the edn seam: strict mode (no auto-resolved keywords), each #_ discard handed
-;; to the callback for tag validation, and a distinct EOF sentinel so the edn
-;; layer can honor its :eof option (nil input is a plain EOF).
-(define (jolt-read-form-edn s cb)
-  (if (jolt-nil? s)
-      (keyword "jolt" "reader-eof")
-      (parameterize ((rdr-edn-mode #t)
-                     (rdr-discard-cb (if (jolt-nil? cb) #f cb)))
-        (let-values (((form j) (rdr-read-top s 0 (string-length s))))
-          (if (rdr-eof? form) (keyword "jolt" "reader-eof") form)))))
 (define (jolt-read-string s)
   (let ((form (jolt-read-form-raw s)))
     (if (jolt-nil? form) form (rdr-form->data form))))
@@ -969,7 +803,7 @@
 ;; __parse-next: [form rest-of-string] or nil when only whitespace/comments left.
 (define (jolt-parse-next s)
   (let ((end (string-length s)))
-    (let-values (((form j) (rdr-read-top s 0 end)))
+    (let-values (((form j) (rdr-read-form s 0 end)))
       (if (rdr-eof? form)
           jolt-nil
           (jolt-vector (rdr-form->data form) (substring s j end))))))
@@ -978,13 +812,8 @@
 ;; is the :#name keyword the reader produced; #uuid/#inst reuse the inst-time ctors.
 (define (jolt-read-tagged tag form)
   (cond
-    ((eq? tag (keyword #f "#uuid"))
+    ((eq? tag (keyword #f "#uuid")) (jolt-uuid-from-string form))
-     (when (string? form) (rdr-validate-uuid! form))
+    ((eq? tag (keyword #f "#inst")) (jolt-inst-from-string form))
-     (jolt-uuid-from-string form))
-    ((eq? tag (keyword #f "#inst"))
-     (when (string? form) (rdr-validate-inst! form))
-     (jolt-inst-from-string form))
-    ((eq? tag (keyword #f "bigdec")) (jolt-bigdec-from-string form))
     ;; No registered reader: consult *default-data-reader-fn*, else throw a clean,
     ;; catchable ex-info naming the tag, like the JVM's "No reader function for tag
     ;; foobar" (empty-pmap is a VALUE — the old (empty-pmap) applied it as a
@@ -1004,4 +833,3 @@
 ;; :default (a #inst can be overridden to defer), rather than read-string building
 ;; the built-in #inst eagerly (which fails on a non-string like #inst ^:ref […]).
 (def-var! "clojure.core" "__read-form-raw" jolt-read-form-raw)
-(def-var! "clojure.core" "__read-form-edn" jolt-read-form-edn)

host/chez/rt.ss

@@ -11,17 +11,6 @@
 ;; Emitted programs do `(load "host/chez/rt.ss")`; this loads values.ss in turn.
 
 (load "host/chez/values.ss")
-;; Resolve a libc entry point at RUN time. A literal (foreign-procedure "name" …)
-;; in COMPILED code becomes a fasl relocation resolved when the boot loads — on a
-;; platform lacking the symbol (chmod/sigaddset on Windows) that kills the boot
-;; before any guard can run. eval defers the lookup to evaluation time, where the
-;; guard works; returns #f when the entry doesn't exist.
-(define (jolt-foreign-proc-safe name args res)
-  (guard (e (#t #f))
-    (load-shared-object #f)
-    (and (foreign-entry? name)
-         (eval `(foreign-procedure ,name ,args ,res)))))
-
 (load "host/chez/collections.ss")
 (load "host/chez/seq.ss")
 
@@ -60,112 +49,6 @@
 ;; stack trace (source-registry.ss). call/cc is paid only on a throw, never per
 ;; call; the captured k is walked, never invoked.
 (define jolt-throw-cont (make-thread-parameter #f))
-
-;; --- tail-frame history: a ring of rings (opt-in) ----------------------------
-;; TCO erases tail-called frames from the native continuation, so an uncaught
-;; error's backtrace shows only the surviving non-tail spine — the immediate error
-;; site is often a tail call and is missing. When tracing is enabled (JOLT_TRACE,
-;; wired in compile-eval.ss), each compiled fn records its frame-name on entry, and
-;; the reporter reads this history to recover TCO-elided frames.
-;;
-;; The store is MIT-Scheme's "history" shape — a ring of rings. The OUTER ring
-;; holds one RIB per non-tail subproblem (the real call spine); each rib's INNER
-;; ring holds the recent tail-calls made AT that subproblem. A non-tail entry
-;; advances the outer ring (a fresh rib); a tail entry rotates the current rib's
-;; inner ring. So a tight tail loop (mutual recursion, a non-recur self-tail-call)
-;; churns ONE rib's small inner ring instead of flushing the outer spine — the
-;; caller context that led into the loop survives. Both rings are fixed-size, so
-;; the whole history is bounded: a constant space factor, NOT a change to the
-;; asymptotic space TCO guarantees.
-;;
-;; Whether an entry is tail or non-tail is set by the CALLER: the emitter marks a
-;; tail call with (jolt-trace-mark! #t) right before it; a non-tail entry is the
-;; default. NOTE this is best-effort: a tail call routed through jolt-invoke to a
-;; target that has no entry prologue (a core/native fn, an anonymous fn held in a
-;; var) does not consume the mark, so a following non-tail frame can be mislabeled
-;; as a tail rotation — a cosmetic mis-grouping in the trace, never a wrong result.
-(define jolt-trace-outer-size 48)          ; ribs (non-tail spine depth kept)
-(define jolt-trace-inner-size 6)           ; tail-calls kept per subproblem
-;; A history: #(ribs-vector outer-head outer-count). A rib: #(name-vector head count).
-(define (jolt-make-rib) (vector (make-vector jolt-trace-inner-size #f) 0 0))
-(define (jolt-make-history)
-  (let ((ribs (make-vector jolt-trace-outer-size #f)))
-    (let loop ((i 0))
-      (when (fx<? i jolt-trace-outer-size)
-        (vector-set! ribs i (jolt-make-rib)) (loop (fx+ i 1))))
-    (vector ribs 0 0)))
-;; A global switch (all threads) plus a per-thread ring, lazily created on first
-;; use — so code run on a spawned thread (a future/agent) records into ITS OWN
-;; history, not the enabling thread's (make-thread-parameter hands a new thread the
-;; initial #f, so we can't rely on inheritance).
-(define jolt-trace-on? #f)
-(define jolt-trace-ring (make-thread-parameter #f))
-(define jolt-trace-tail? (make-thread-parameter #f))   ; caller-set, consumed per entry
-(define (jolt-trace-enable!) (set! jolt-trace-on? #t) (jolt-trace-ring (jolt-make-history)))
-;; this thread's ring, created on demand while tracing is on
-(define (jolt-trace-cur-ring)
-  (or (jolt-trace-ring)
-      (and jolt-trace-on? (let ((h (jolt-make-history))) (jolt-trace-ring h) h))))
-;; Drop accumulated history at a top-level boundary (compile-eval.ss calls this per
-;; top-level form) so an error's trace shows only the forms that led to it, not the
-;; frames of earlier, already-returned REPL/eval forms.
-(define (jolt-trace-reset!)
-  (when (jolt-trace-ring) (jolt-trace-ring (jolt-make-history)) (jolt-trace-tail? #f)))
-(define (jolt-trace-mark! t) (jolt-trace-tail? t))
-
-;; push name into a rib's inner ring
-(define (jolt-rib-push! rib name)
-  (let ((buf (vector-ref rib 0)) (i (vector-ref rib 1)) (cnt (vector-ref rib 2)))
-    (vector-set! buf i name)
-    (vector-set! rib 1 (fxmod (fx+ i 1) jolt-trace-inner-size))
-    (when (fx<? cnt jolt-trace-inner-size) (vector-set! rib 2 (fx+ cnt 1)))))
-;; a non-tail entry: advance the outer ring, reset the new rib, seed it with name
-(define (jolt-history-nontail! h name)
-  (let* ((ribs (vector-ref h 0)) (oh (vector-ref h 1)) (oc (vector-ref h 2))
-         (rib (vector-ref ribs oh)))
-    (vector-set! rib 1 0) (vector-set! rib 2 0)
-    (jolt-rib-push! rib name)
-    (vector-set! h 1 (fxmod (fx+ oh 1) jolt-trace-outer-size))
-    (when (fx<? oc jolt-trace-outer-size) (vector-set! h 2 (fx+ oc 1)))))
-;; a tail entry: rotate the CURRENT rib's inner ring (bootstrap a rib if none yet)
-(define (jolt-history-tail! h name)
-  (if (fx=? (vector-ref h 2) 0)
-      (jolt-history-nontail! h name)
-      (let* ((ribs (vector-ref h 0))
-             (cur (fxmod (fx+ (fx- (vector-ref h 1) 1) jolt-trace-outer-size)
-                         jolt-trace-outer-size)))
-        (jolt-rib-push! (vector-ref ribs cur) name))))
-;; Record a frame entry, routed by the caller's tail mark; then reset the mark so a
-;; subsequent entry reached WITHOUT a mark (e.g. via apply) defaults to non-tail.
-(define (jolt-trace-push! name)
-  (let ((h (jolt-trace-cur-ring)))
-    (when h
-      (if (jolt-trace-tail?) (jolt-history-tail! h name) (jolt-history-nontail! h name))
-      (jolt-trace-tail? #f)))
-  jolt-nil)
-
-;; a rib's inner names, most-recent (deepest) tail first
-(define (jolt-rib-names rib)
-  (let ((buf (vector-ref rib 0)) (head (vector-ref rib 1)) (cnt (vector-ref rib 2)))
-    (let loop ((k 1) (acc '()))
-      (if (fx>? k cnt)
-          (reverse acc)
-          (loop (fx+ k 1)
-                (cons (vector-ref buf (fxmod (fx+ (fx- head k) jolt-trace-inner-size)
-                                             jolt-trace-inner-size))
-                      acc))))))
-;; The whole history flattened to frame-names, most-recent (deepest) first:
-;; current rib's tail-history, then its non-tail caller's, and so on outward.
-(define (jolt-trace-snapshot)
-  (let ((h (jolt-trace-ring)))
-    (if (not h) '()
-        (let* ((ribs (vector-ref h 0)) (oh (vector-ref h 1)) (oc (vector-ref h 2)))
-          (let loop ((k 1) (acc '()))
-            (if (fx>? k oc)
-                (apply append (reverse acc))
-                (let ((idx (fxmod (fx+ (fx- oh k) jolt-trace-outer-size) jolt-trace-outer-size)))
-                  (loop (fx+ k 1) (cons (jolt-rib-names (vector-ref ribs idx)) acc)))))))))
-
 (define-condition-type &jolt-throw &condition
   make-jolt-throw-condition jolt-throw-condition?
   (value jolt-throw-condition-value))

host/chez/run-corpus.ss

@@ -11,7 +11,7 @@
 ;; reset between cases so there is no leakage — same isolation a fresh process gives.
 ;;
 ;;   chez --script host/chez/run-corpus.ss
-;;   JOLT_CHEZ_ZJ_FLOOR=N   override the regression floor (default 3390)
+;;   JOLT_CHEZ_ZJ_FLOOR=N   override the regression floor (default 2730)
 ;;   JOLT_CORPUS_LIMIT=N    every-Nth stride (fast iteration; floor drops to 0)
 ;;   JOLT_DUMP_CRASH_LABELS=1   list crash + allowlisted labels
 (import (chezscheme))
@@ -196,7 +196,7 @@
 
 ;; Regression floor: fail on any NEW divergence or if pass drops below the floor.
 (define base-floor (let ((s (getenv "JOLT_CHEZ_ZJ_FLOOR")))
-                     (if s (string->number s) 3390)))
+                     (if s (string->number s) 2730)))
 (define floor (if limit 0 base-floor))
 (when (or (> (length diverged) 0) (< pass floor))
   (printf "REGRESSION: pass ~a < floor ~a or ~a new divergence(s)\n"

host/chez/seq.ss

@@ -237,12 +237,7 @@
   (cond ((not (and (number? a) (number? b))) (jolt-quot-slow a b))
         ((or (flonum? a) (flonum? b))
          (let ((n (real->flonum a)) (d (real->flonum b)))
-           (if (fl= d 0.0) (jolt-div0-throw)
+           (if (fl= d 0.0) (jolt-div0-throw) (fltruncate (fl/ n d)))))
-               (let ((q (fl/ n d)))
-                 (when (or (nan? q) (infinite? q))
-                   (jolt-throw (jolt-host-throwable "java.lang.NumberFormatException"
-                                                    "Infinite or NaN")))
-                 (fltruncate q)))))
         ((eqv? b 0) (jolt-div0-throw))
         ((and (integer? a) (integer? b)) (quotient a b))
         (else (truncate (/ a b)))))
@@ -251,11 +246,7 @@
         ((or (flonum? a) (flonum? b))
          (let ((n (real->flonum a)) (d (real->flonum b)))
            (if (fl= d 0.0) (jolt-div0-throw)
-               (let ((q (fl/ n d)))
+               (fl- n (fl* d (fltruncate (fl/ n d)))))))
-                 (when (or (nan? q) (infinite? q))
-                   (jolt-throw (jolt-host-throwable "java.lang.NumberFormatException"
-                                                    "Infinite or NaN")))
-                 (fl- n (fl* d (fltruncate q)))))))
         ((eqv? b 0) (jolt-div0-throw))
         ((and (integer? a) (integer? b)) (remainder a b))
         (else (- a (* b (truncate (/ a b)))))))
@@ -460,11 +451,6 @@
     ((procedure? f) (apply f args))
     ((keyword? f) (apply jolt-get (car args) f (cdr args)))   ; (:k m [d]) -> (get m :k [d])
     ((jolt-symbol? f) (apply jolt-get (car args) f (cdr args)))   ; ('s m [d]) -> (get m 's [d])
-    ;; a VECTOR invokes as nth (a bad index throws, like IPersistentVector.invoke);
-    ;; maps and sets invoke as get.
-    ((pvec? f) (if (and (pair? args) (null? (cdr args)))
-                   (jolt-nth f (car args))
-                   (apply jolt-get f args)))
     ((jolt-coll? f) (apply jolt-get f args))                  ; (coll k [d]) -> (get coll k [d])
     ((jolt-transient? f) (apply jolt-get f args))             ; a transient vec/map/set is callable on the JVM
     ;; a record/reify implementing clojure.lang.IFn is callable: dispatch to its
@@ -661,14 +647,8 @@
 ;; falls back to a copy-on-write wrapper for other targets (lists, sorted colls,
 ;; nil), so those keep the old per-step jolt-conj behaviour.
 (define (jolt-into to from)
-  ;; only an editable collection rides the transient path; anything else
-  ;; (PersistentQueue, sorted colls, seqs) folds through conj, like RT's
-  ;; instanceof IEditableCollection split.
-  (if (or (pvec? to) (pmap? to) (pset? to))
   (meta-carry to
-        (jolt-persistent! (reduce-seq (lambda (t x) (jolt-conj! t x)) (jolt-transient-new to) (jolt-seq from))))
+    (jolt-persistent! (reduce-seq (lambda (t x) (jolt-conj! t x)) (jolt-transient-new to) (jolt-seq from)))))
-      (meta-carry to
-        (reduce-seq (lambda (acc x) (jolt-conj1 acc x)) to (jolt-seq from)))))
 
 (define (range-from n) (cseq-lazy n (lambda () (range-from (+ n 1)))))
 ;; A bounded range is a real chunked-seq, like clojure.lang.LongRange: eager, with
@@ -773,14 +753,8 @@
 ;; Parity over the full integer range (JVM even?/odd? accept any integer,
 ;; bignums included); a fixnum-only fxand crashes on a large value (e.g. a hash).
 (define (parity-int n) (if (flonum? n) (exact (floor n)) n))
-(define (jolt-parity-check n)
+(define (jolt-even? n) (even? (parity-int n)))
-  (unless (and (number? n) (exact? n) (integer? n))
+(define (jolt-odd? n) (odd? (parity-int n)))
-    (jolt-throw (jolt-host-throwable
-                 "java.lang.IllegalArgumentException"
-                 (string-append "Argument must be an integer: "
-                                (guard (e (#t "?")) (jolt-str n)))))))
-(define (jolt-even? n) (jolt-parity-check n) (even? (parity-int n)))
-(define (jolt-odd? n) (jolt-parity-check n) (odd? (parity-int n)))
 (define (jolt-pos? n) (> n 0))
 (define (jolt-neg? n) (< n 0))
 (define (jolt-zero? n) (= n 0))
@@ -789,18 +763,8 @@
 ;; ============================================================================
 ;; keys / vals — return seqs (nil on the empty map), HAMT-iteration order
 ;; ============================================================================
-;; keys/vals of anything empty is nil (RT.keys over a nil seq); a non-empty
+(define (jolt-keys m) (if (jolt-nil? m) jolt-nil (list->cseq (pmap-fold m (lambda (k v a) (cons k a)) '()))))
-;; non-map still fails (its elements are not MapEntries).
+(define (jolt-vals m) (if (jolt-nil? m) jolt-nil (list->cseq (pmap-fold m (lambda (k v a) (cons v a)) '()))))
-(define (jolt-keys m)
-  (cond ((jolt-nil? m) jolt-nil)
-        ((pmap? m) (list->cseq (pmap-fold m (lambda (k v a) (cons k a)) '())))
-        ((jolt-nil? (jolt-seq m)) jolt-nil)
-        (else (list->cseq (pmap-fold m (lambda (k v a) (cons k a)) '())))))
-(define (jolt-vals m)
-  (cond ((jolt-nil? m) jolt-nil)
-        ((pmap? m) (list->cseq (pmap-fold m (lambda (k v a) (cons v a)) '())))
-        ((jolt-nil? (jolt-seq m)) jolt-nil)
-        (else (list->cseq (pmap-fold m (lambda (k v a) (cons v a)) '())))))
 
 ;; ============================================================================
 ;; sequential equality + hash (hooks called from values.ss / collections.ss);

host/chez/smoke.sh

@@ -30,39 +30,6 @@ check_loc() {
   fi
 }
 
-# An uncaught error's stack trace must name the runtime-eval'd fn frames that
-# survive TCO (the non-tail spine), even though the eval path registers no source
-# map — "print what is available". Asserts a substring appears under "  trace:".
-check_trace() {
-  err="$(bin/joltc -e "$1" 2>&1 >/dev/null)"
-  if printf '%s' "$err" | grep -q '  trace:' && printf '%s' "$err" | grep -q "$2"; then
-    pass=$((pass + 1))
-  else
-    echo "  FAIL (trace): $1"
-    echo "    want stderr trace to contain \`$2\`, got \`$err\`"
-    fails=$((fails + 1))
-  fi
-}
-
-# JOLT_TRACE opts into the tail-frame history (the ring of rings): every $2 (an
-# ERE) must match the "  trace:" block. Used to assert TCO-elided frames are
-# recovered and non-tail caller context survives a tail loop.
-check_trace_on() {
-  err="$(JOLT_TRACE=1 bin/joltc -e "$1" 2>&1 >/dev/null)"
-  ok=1
-  printf '%s' "$err" | grep -q '  trace:' || ok=0
-  shift
-  for want in "$@"; do
-    printf '%s' "$err" | grep -Eq "$want" || ok=0
-  done
-  if [ "$ok" = 1 ]; then
-    pass=$((pass + 1))
-  else
-    echo "  FAIL (trace-on): want [$*] in trace, got \`$err\`"
-    fails=$((fails + 1))
-  fi
-}
-
 check '(+ 1 2)' '3'
 check '(defn fib [n] (if (< n 2) n (+ (fib (- n 1)) (fib (- n 2))))) (fib 15)' '610'
 check '(->> (range 10) (filter even?) (map (fn [x] (* x x))) (reduce +))' '120'
@@ -93,53 +60,6 @@ check '(try (load-string "(+") (catch :default e (ex-message e)))' 'EOF while re
 check_loc '(throw (ex-info "boom" {}))' 'boom'
 check_loc '(do (+ 1 1) (/ 1 0))' '  at 1:'
 
-# Runtime-eval'd fns aren't source-mapped, but their native frame names survive on
-# the non-tail spine; the trace must show them. deepest/+ are tail calls (erased);
-# middle and outer wait on a non-tail (inc …) so their frames are live at the throw.
-trace_prog='(defn deepest [x] (+ x 1)) (defn middle [x] (inc (deepest x))) (defn outer [x] (inc (middle x))) (outer :nan)'
-check_trace "$trace_prog" 'middle'
-check_trace "$trace_prog" 'outer'
-
-# JOLT_TRACE (tail-frame history / ring of rings). An all-tail chain is entirely
-# TCO-erased from the continuation, but the history recovers every frame — incl.
-# `deepest`, the actual error site.
-check_trace_on '(defn deepest [x] (+ x 1)) (defn middle [x] (deepest x)) (defn outer [x] (middle x)) (outer :nan)' \
-  'deepest' 'middle' 'outer'
-# A tail loop (a<->b) under a NON-tail caller: the loop is confined to one rib's
-# bounded inner ring, so the caller context (`driver`, `top`) is NOT flushed out —
-# the point of the ring of rings.
-check_trace_on '(declare b) (defn a [n] (if (zero? n) (+ :x 1) (b (dec n)))) (defn b [n] (a n)) (defn driver [] (inc (a 6))) (defn top [] (inc (driver))) (top)' \
-  'driver' 'top'
-# A ^long/^double return hint wraps the body in a coercion, so the hinted fn's call
-# is NOT a tail call — its own frame is still live and must appear (not be elided).
-check_trace_on '(defn g [n] (+ :x n)) (defn ^long f [n] (g n)) (f 3)' 'f' 'g'
-# History is per top-level form: a later form's error trace shows its own frames
-# (h2/u2), not frames from an earlier, already-returned form (h1/u1).
-check_trace_on '(defn h1 [x] (inc x)) (defn u1 [] (inc (h1 5))) (u1) (defn h2 [x] (+ :x x)) (defn u2 [] (inc (h2 5))) (u2)' \
-  'h2' 'u2'
-err_stale="$(JOLT_TRACE=1 bin/joltc -e '(defn h1 [x] (inc x)) (defn u1 [] (inc (h1 5))) (u1) (defn h2 [x] (+ :x x)) (defn u2 [] (inc (h2 5))) (u2)' 2>&1 >/dev/null)"
-if printf '%s' "$err_stale" | grep -q 'h1'; then
-  echo "  FAIL (trace-on): stale frame h1 from an earlier form leaked into the trace"
-  fails=$((fails + 1))
-else
-  pass=$((pass + 1))
-fi
-# A file-backed project run maps each runtime-compiled frame to ns/name (file:line)
-# — the eval path registers source in trace mode, so the trace isn't bare names.
-tr_proj="$(mktemp -d)"
-mkdir -p "$tr_proj/src/tp"
-printf '{:paths ["src"] :aliases {:run {:main-opts ["-m" "tp.core"]}}}\n' > "$tr_proj/deps.edn"
-printf '(ns tp.core)\n(defn deep [x] (+ x 1))\n(defn mid [x] (inc (deep x)))\n(defn -main [& _] (mid :nan))\n' > "$tr_proj/src/tp/core.clj"
-tr_out="$(JOLT_TRACE=1 JOLT_PWD="$tr_proj" bin/joltc -M:run 2>&1)"
-if printf '%s' "$tr_out" | grep -Eq 'tp\.core/deep \(.*/tp/core\.clj:2\)'; then
-  pass=$((pass + 1))
-else
-  echo "  FAIL: JOLT_TRACE trace should map a frame to ns/name (file:line)"
-  printf '%s\n' "$tr_out" | sed 's/^/    | /'
-  fails=$((fails + 1))
-fi
-rm -rf "$tr_proj"
-
 # --help prints usage, and lists the nREPL server under its real flag name.
 help_out="$(bin/joltc --help 2>/dev/null)"
 if printf '%s' "$help_out" | grep -q -- '--nrepl-server'; then
@@ -239,25 +159,5 @@ else
   fails=$((fails + 1))
 fi
 
-# REPL-driven development traces by default: an error in an evaluated form shows a
-# tail-frame backtrace with no JOLT_TRACE set. rb tail-calls ra tail-calls +, all
-# TCO-elided from the continuation — only the history recovers them.
-repl_err="$(printf '(defn ra [x] (+ x 1))\n(defn rb [x] (ra x))\n(rb :nan)\n:exit\n' | bin/joltc repl 2>&1)"
-if printf '%s' "$repl_err" | grep -q '  trace:' && printf '%s' "$repl_err" | grep -q 'rb'; then
-  pass=$((pass + 1))
-else
-  echo "  FAIL: a REPL error should show a tail-frame trace by default"
-  printf '%s\n' "$repl_err" | sed 's/^/    | /'
-  fails=$((fails + 1))
-fi
-# JOLT_TRACE=0 opts out — no trace in the REPL.
-repl_off="$(printf '(defn ra [x] (+ x 1))\n(defn rb [x] (ra x))\n(rb :nan)\n:exit\n' | JOLT_TRACE=0 bin/joltc repl 2>&1)"
-if printf '%s' "$repl_off" | grep -q '  trace:'; then
-  echo "  FAIL: JOLT_TRACE=0 should suppress the REPL trace"
-  fails=$((fails + 1))
-else
-  pass=$((pass + 1))
-fi
-
 echo "cli smoke: $pass passed, $fails failed"
 [ "$fails" -eq 0 ]

host/chez/source-registry.ss

@@ -57,36 +57,10 @@
                       ((symbol? nm) (symbol->string nm))
                       (else #f)))))))
 
-;; Frame names that are pure Chez / jolt-runtime plumbing — the eval boundary,
+;; Walk a continuation, returning the registered jolt frames (innermost first) as
-;; the var-cell trampoline, continuation/winder internals. They carry no Clojure
+;; (frame-name . record) pairs, where record is #(ns name file line) or the symbol
-;; meaning, so an unmapped frame with one of these names is dropped from the trace
+;; 'ambiguous. Unmapped frames (host spine, anonymous lambdas) are skipped; raw
-;; (a MAPPED frame is always kept — a jolt fn that happens to share the name still
+;; depth is capped.
-;; resolves to its source). Any name Chez prefixes with `$` (system) or that jolt
-;; prefixes with `jolt-` (host runtime) is plumbing too.
-(define srcreg-plumbing-names
-  (let ((h (make-hashtable string-hash string=?)))
-    (for-each (lambda (s) (hashtable-set! h s #t))
-              '("dynamic-wind" "winder-dummy" "ksrc" "invoke" "apply"
-                "call-with-values" "call/cc" "call-with-current-continuation"
-                "raise" "raise-continuable" "with-exception-handler" "guard"
-                "eval" "compile" "interpret" "expand" "read" "load"
-                ;; host dispatch/coercion helpers (not `jolt-` prefixed) that carry
-                ;; no Clojure meaning in a trace
-                "record-method-dispatch" "protocol-resolve" "devirt-resolve"
-                "list->cseq" "host-static-call" "host-call"))
-    h))
-(define (srcreg-plumbing-name? nm)
-  (or (hashtable-ref srcreg-plumbing-names nm #f)
-      (and (fx>? (string-length nm) 0) (char=? (string-ref nm 0) #\$))
-      (and (fx>=? (string-length nm) 5) (string=? (substring nm 0 5) "jolt-"))))
-
-;; Walk a continuation, returning its frames (innermost first) as (frame-name .
-;; record) pairs. record is a source vector #(ns name file line) for a frame that
-;; maps to registered Clojure source, the symbol 'ambiguous for a short name shared
-;; across namespaces, or #f for an unmapped-but-named frame (the common case on the
-;; open-world eval path, where nothing is registered — the bare frame name is still
-;; a useful trace line). Plumbing frames (host spine, eval boundary) and unnamed
-;; frames are skipped; raw depth is capped.
 (define (jolt-frame-records k)
   ;; read the env at call time, not load time: a built binary runs top-level forms
   ;; at heap-build time, where this would always be unset.
@@ -96,32 +70,26 @@
       (if (or (not io) (fx>=? n 400))
           (reverse acc)
           (let* ((nm (srcreg-frame-name io))
-                 (src (and nm (hashtable-ref source-registry nm #f)))
+                 (src (and nm (hashtable-ref source-registry nm #f))))
-                 ;; keep a frame that maps, or any named frame that isn't plumbing
-                 (keep? (and nm (or src (not (srcreg-plumbing-name? nm))))))
             (when (and debug? nm)
-              (display (string-append "  [frame] " nm (if src " *MAPPED*"
+              (display (string-append "  [frame] " nm (if src " *MAPPED*" "") "\n")
-                                                          (if keep? "" " (skipped)")) "\n")
                        (current-error-port)))
             (loop (guard (e (#t #f)) (io 'link)) (fx+ n 1)
-                  (if keep? (cons (cons nm src) acc) acc))))))))
+                  (if src (cons (cons nm src) acc) acc))))))))
 
-;; Render a list of (frame-name . record) pairs (innermost/deepest first) to a
+;; Multi-line backtrace for an uncaught value — "  ns/name (file:line)" for a
-;; backtrace string. record is a source vector #(ns name file line) -> "ns/name
+;; mapped frame, the bare frame name for an ambiguous one — or #f when no jolt
-;; (file:line)", or 'ambiguous / #f -> the bare frame name. A run of the same
+;; frame maps (the caller then prints just the top-level location). Capped to the
-;; frame-name collapses to one "name (xN)" line (deep recursion, or a hot fn a
+;; innermost frames.
-;; loop re-enters), and the number of distinct lines is capped.
+(define (jolt-backtrace-string v)
-(define (jolt-render-recs recs)
+  (let ((k (jolt-error-continuation v)))
+    (and k
+         (let ((recs (jolt-frame-records k)))
+           (and (pair? recs)
                 (let ((port (open-output-string)))
                   (let loop ((rs recs) (shown 0))
-      (if (or (null? rs) (fx>=? shown 30))
+                    (when (and (pair? rs) (fx<? shown 30))
-          (get-output-string port)
                       (let* ((p (car rs)) (frame-name (car p)) (r (cdr p)))
-            ;; count a maximal run of the same frame-name
-            (let run ((tail (cdr rs)) (cnt 1))
-              (if (and (pair? tail) (string=? (car (car tail)) frame-name))
-                  (run (cdr tail) (fx+ cnt 1))
-                  (begin
                         (put-string port "    ")
                         (if (vector? r)
                             (let ((ns (vector-ref r 0)) (nm (vector-ref r 1))
@@ -131,49 +99,10 @@
                                 (put-string port " (") (put-string port file)
                                 (put-string port ":") (put-string port (number->string line))
                                 (put-string port ")")))
-                        (put-string port frame-name))   ; 'ambiguous / unmapped: bare name
+                            (put-string port frame-name))   ; 'ambiguous: bare name
-                    (when (fx>? cnt 1)
+                        (put-char port #\newline))
-                      (put-string port " (x") (put-string port (number->string cnt)) (put-string port ")"))
+                      (loop (cdr rs) (fx+ shown 1))))
-                    (put-char port #\newline)
+                  (get-output-string port)))))))
-                    (loop tail (fx+ shown 1))))))))))
-
-;; Multi-line backtrace for an uncaught value. Two sources, in preference order:
-;;   1. The tail-frame history ring (rt.ss), when JOLT_TRACE enabled it — an
-;;      execution history of the runtime-compiled fns entered before the throw,
-;;      INCLUDING ones TCO erased from the live continuation. Most-recent first.
-;;   2. Otherwise the live continuation (jolt-frame-records) — the accurate but
-;;      TCO-truncated non-tail spine.
-;; Each frame maps to "ns/name (file:line)" when registered, else its bare name.
-;; #f when neither source yields a frame (the caller then prints just the location).
-;; The tail-frame history ring rendered as a backtrace, or #f when tracing is off /
-;; empty. A mapped frame is kept; else drop plumbing (same rule as the continuation
-;; path) so the two sources read consistently.
-(define (jolt-history-backtrace)
-  (let* ((hist (jolt-trace-snapshot))
-         (recs (let loop ((ns hist) (acc '()))
-                 (if (null? ns)
-                     (reverse acc)
-                     (let* ((nm (car ns)) (src (hashtable-ref source-registry nm #f)))
-                       (loop (cdr ns)
-                             (if (or src (not (srcreg-plumbing-name? nm)))
-                                 (cons (cons nm src) acc) acc)))))))
-    (and (pair? recs) (jolt-render-recs recs))))
-
-(define (jolt-backtrace-string v)
-  (or (jolt-history-backtrace)
-      (let ((k (jolt-error-continuation v)))
-        (and k
-             (let ((recs (jolt-frame-records k)))
-               (and (pair? recs) (jolt-render-recs recs)))))))
-
-;; Exposed for the REPL / nREPL error paths, which catch errors themselves instead
-;; of going through the uncaught reporter. Returns the "  trace:\n<frames>" block
-;; from the tail-frame HISTORY only — the live continuation in a REPL is just the
-;; REPL's own machinery — or nil when tracing is off (so a caller can when-let).
-(def-var! "jolt.host" "backtrace-string"
-  (lambda ()
-    (let ((bt (jolt-history-backtrace)))
-      (if bt (string-append "  trace:\n" bt) jolt-nil))))
 
 ;; Render an uncaught jolt throw (any value, not just a Chez condition) to a port:
 ;; an ex-info shows its message + ex-data (+ a host cause); anything else is

host/chez/stub/launcher.c

@@ -26,12 +26,6 @@ static int self_path(char *buf, uint32_t size) {
   /* _NSGetExecutablePath fills buf and reports the needed size on overflow. */
   return _NSGetExecutablePath(buf, &size);
 }
-#elif defined(_WIN32)
-#include <windows.h>
-static int self_path(char *buf, uint32_t size) {
-  DWORD n = GetModuleFileNameA(NULL, buf, size);
-  return (n == 0 || n >= size) ? -1 : 0;
-}
 #else
 #include <unistd.h>
 static int self_path(char *buf, uint32_t size) {

host/chez/transients.ss

@@ -44,16 +44,7 @@
      (let ((ht (make-hashtable key-hash jolt=2)))
        (pset-fold coll (lambda (e acc) (hashtable-set! ht e #t) acc) 0)
        (make-jolt-transient 'set ht 0 #t #f)))
-    ;; RFC 0003: any COLLECTION transients (the sorted/list/seq superset rides
+    (else (make-jolt-transient 'cow coll 0 #t #f))))
-    ;; the copy-on-write fallback); a non-collection is the JVM's cast failure.
-    ((or (cseq? coll) (empty-list-t? coll) (jolt-lazyseq? coll)
-         (htable? coll) (jrec? coll))
-     (make-jolt-transient 'cow coll 0 #t #f))
-    (else
-     (jolt-throw (jolt-host-throwable
-                  "java.lang.ClassCastException"
-                  (string-append "class " (guard (e (#t "?")) (jolt-class-name coll))
-                                 " cannot be cast to class clojure.lang.IEditableCollection"))))))
 
 ;; map put/delete that maintain the reverse insertion-order list in `ord`.
 (define (tmap-put! t k v)
@@ -86,11 +77,7 @@
                (if (fx<? i cnt) (begin (vector-set! out i (vector-ref buf i)) (loop (fx+ i 1)))
                    (make-pvec out)))))))
     ((map)
-     (let* ((ht (jolt-transient-buf t)) (cnt (hashtable-size ht)) (cap (jolt-transient-n t))
+     (let* ((ht (jolt-transient-buf t)) (cnt (hashtable-size ht)) (cap (jolt-transient-n t)))
-            ;; Clojure 1.13: a keyword-only map stays an array map up to 64 entries,
-            ;; so a keyword map built through a transient (into {} …) keeps insertion
-            ;; order to 64, matching the literal/assoc paths.
-            (cap (if (all-keywords? (jolt-transient-ord t)) (fxmax array-map-limit-kw cap) cap)))
        (if (fx>? cnt cap)
            ;; promoted past the array capacity: hash order
            (let ((m empty-pmap-hash))

jolt-core/clojure/core/00-syntax.clj

@@ -188,23 +188,9 @@
                      [false nil]
                      (if or-map (keys or-map) [])))
          amp? (fn* [x] (and (symbol? x) (= "&" (name x))))
-         ;; split a :keys/:syms/:strs name list at & into [sym bind?] pairs. Names
-         ;; before & bind normally (bind? true); names after & are declared-only
-         ;; (bind? false) — accepted keys (:keys) or required keys (:keys!), per
-         ;; CLJ-2961.
-         classify
-           (fn* [names]
-             (nth (reduce (fn* [st x]
-                            (if (amp? x)
-                              [(nth st 0) false]
-                              [(conj (nth st 0) [x (nth st 1)]) (nth st 1)]))
-                          [[] true] names)
-                  0))
          proc
            (fn* proc [pat init acc]
              (cond
-               ;; CLJ-2954: & is reserved for destructuring rest, never a binding.
-               (amp? pat) (throw (new IllegalArgumentException "Can't use & as a local binding"))
                (symbol? pat) (conj (conj acc pat) init)
                (vector? pat)
                  (let* [g (symbol (str (gensym)))
@@ -245,45 +231,30 @@
                         ;; group binds a :keys/:strs/:syms list. dnsp is the destructuring
                         ;; namespace from a qualified key like :ns/keys — it both prefixes
                         ;; the lookup key and overrides a bare symbol's namespace.
-                        ;; group binds a :keys/:strs/:syms list. checked? marks the
-                        ;; :keys!/:strs!/:syms! variants (CLJ-2961): lookups use req!
-                        ;; (throw on missing) instead of get. A pair is [sym bind?];
-                        ;; bind? false (names after &) is declared-only — for checked
-                        ;; groups it still runs req! (bound to a throwaway gensym) to
-                        ;; enforce the key, for unchecked groups it's a no-op.
                         group
-                          (fn* group [a names kind dnsp checked?]
+                          (fn* group [a names kind dnsp]
                             (if names
                                 (reduce
                                   ;; s is a symbol (a b) or a keyword (:a :b); name/
                                   ;; namespace handle both, so :keys [:major] binds
                                   ;; `major` looking up :major (str would keep the colon).
-                                  (fn* [aa pair]
+                                  (fn* [aa s]
-                                    (let* [s (nth pair 0)
+                                    (let* [local (name s)
-                                           bind? (nth pair 1)
-                                           local (name s)
                                            nsp (or (namespace s) dnsp)
                                            keyform (cond
                                                      (= kind :kw) (keyword (if nsp (str nsp "/" local) local))
                                                      (= kind :str) local
                                                      :else `(quote ~(symbol nsp local)))
-                                           fo (find-or or-map local)
+                                           fo (find-or or-map local)]
-                                           lookup (cond
+                                      (conj (conj aa (symbol local))
-                                                    checked? `(req! ~gm ~keyform)
+                                            (if (nth fo 0)
-                                                    (nth fo 0) `(get ~gm ~keyform ~(nth fo 1))
+                                              `(get ~gm ~keyform ~(nth fo 1))
-                                                    :else `(get ~gm ~keyform))]
+                                              `(get ~gm ~keyform)))))
-                                      (cond
+                                  a names)
-                                        bind?    (conj (conj aa (symbol local)) lookup)
-                                        checked? (conj (conj aa (symbol (str (gensym)))) lookup)
-                                        :else    aa)))
-                                  a (classify names))
                                 a))
-                        g1 (group base (get pat :keys)  :kw  nil false)
+                        g1 (group base (get pat :keys) :kw nil)
-                        g2 (group g1   (get pat :strs)  :str nil false)
+                        g2 (group g1 (get pat :strs) :str nil)
-                        g3 (group g2   (get pat :syms)  :sym nil false)
+                        g3 (group g2 (get pat :syms) :sym nil)]
-                        g4 (group g3   (get pat :keys!) :kw  nil true)
-                        g5 (group g4   (get pat :strs!) :str nil true)
-                        g6 (group g5   (get pat :syms!) :sym nil true)]
                    ;; remaining keys: a qualified :ns/keys|:ns/strs|:ns/syms groups under
                    ;; its namespace; any other keyword is skipped; a non-keyword is a
                    ;; nested binding pattern.
@@ -291,12 +262,9 @@
                              (if (keyword? k)
                                (let* [kn (name k) kns (namespace k)]
                                  (cond
-                                   (and kns (= kn "keys"))  (group a (get pat k) :kw  kns false)
+                                   (and kns (= kn "keys")) (group a (get pat k) :kw kns)
-                                   (and kns (= kn "strs"))  (group a (get pat k) :str kns false)
+                                   (and kns (= kn "strs")) (group a (get pat k) :str kns)
-                                   (and kns (= kn "syms"))  (group a (get pat k) :sym kns false)
+                                   (and kns (= kn "syms")) (group a (get pat k) :sym kns)
-                                   (and kns (= kn "keys!")) (group a (get pat k) :kw  kns true)
-                                   (and kns (= kn "strs!")) (group a (get pat k) :str kns true)
-                                   (and kns (= kn "syms!")) (group a (get pat k) :sym kns true)
                                    :else a))
                                ;; a direct binding {x :x}: apply its :or default
                                ;; (keyed by the local symbol) when the key is absent.
@@ -305,7 +273,7 @@
                                            `(get ~gm ~(get pat k) ~(nth fo 1))
                                            `(get ~gm ~(get pat k)))
                                        a))))
-                           g6 (keys pat)))
+                           g3 (keys pat)))
                :else (throw (str "unsupported destructuring pattern: " (pr-str pat)))))
          ploop
            (fn* ploop [i acc]
@@ -577,8 +545,6 @@
 ;; name binds only in the taken branch (temp# tests the value); via `let` so the
 ;; binding form may itself destructure, matching Clojure.
 (defmacro when-let [bindings & body]
-  (when (not= 2 (count bindings))
-    (throw (new IllegalArgumentException "when-let requires exactly 2 forms in binding vector")))
   (let [form (bindings 0) tst (bindings 1)]
     `(let [temp# ~tst]
        (if temp# (let [~form temp#] ~@body) nil))))

jolt-core/clojure/core/20-coll.clj

@@ -219,8 +219,7 @@
 ;; compiler emit/inference path) — see predicates.ss.
 (defn ratio? [x]
   (and (number? x) (jolt.host/exact? x) (jolt.host/rational-type? x) (not (integer? x))))
-(defn rational? [x]
+(defn rational? [x] (and (number? x) (jolt.host/exact? x)))
-  (or (and (number? x) (jolt.host/exact? x)) (decimal? x)))
 ;; No first-class Class objects: class names are symbols the evaluator handles in
 ;; instance?/new positions, never values — so nothing is a class.
 (defn class? [x] false)
@@ -275,8 +274,7 @@
     (loop [i 0 s (seq coll)]
       (if (and s (< i n)) (recur (inc i) (next s)) i))))
 
-;; the reducing fn returns proc's result, so a Reduced from proc short-circuits
+(defn run! [proc coll] (reduce (fn [_ x] (proc x) nil) nil coll) nil)
-(defn run! [proc coll] (reduce (fn [_ x] (proc x)) nil coll) nil)
 
 (defn completing
   ([f] (completing f identity))
@@ -459,8 +457,7 @@
 (defn sequential? [x] (or (vector? x) (seq? x)))
 (defn associative? [x] (or (map? x) (vector? x)))
 (defn counted? [x]
-  ;; a String is not Counted on the JVM (count works via CharSequence, not O(1))
+  (or (vector? x) (map? x) (set? x) (list? x) (string? x)))
-  (or (vector? x) (map? x) (set? x) (list? x)))
 (defn indexed? [x] (vector? x))
 ;; sorted? is defined by the next tier (25-sorted) — declared here so this
 ;; tier compiles (forward references are analysis errors).
@@ -468,7 +465,7 @@
 
 (defn reversible? [x] (or (vector? x) (sorted? x)))
 (defn seqable? [x]
-  (if (or (nil? x) (coll? x) (string? x) (jolt.host/array-value? x)) true false))
+  (or (nil? x) (coll? x) (string? x)))
 
 (defn boolean? [x] (or (true? x) (false? x)))
 (defn double? [x] (and (number? x) (not (integer? x))))

jolt-core/clojure/core/21-coll.clj

@@ -12,8 +12,7 @@
 ;; Clojure. Collections only — a string is seqable but not shuffleable, as on
 ;; the JVM (Collections/shuffle wants a Collection).
 (defn shuffle [coll]
-  ;; Collections/shuffle wants a java.util.Collection — a map is not one
+  (when-not (coll? coll)
-  (when (or (not (coll? coll)) (map? coll))
     (throw (ex-info (str "shuffle requires a collection, got: " coll) {})))
   (loop [v (vec coll) i (dec (count v))]
     (if (pos? i)
@@ -29,10 +28,6 @@
 (defn sort-by
   ([keyfn coll] (sort-by keyfn compare coll))
   ([keyfn comp coll]
-   ;; a collection is never a Comparator (the JVM cast would fail); catching it
-   ;; here beats silently "sorting" through coll-as-fn lookups
-   (when (coll? comp)
-     (throw (new ClassCastException (str (class comp) " cannot be cast to java.util.Comparator"))))
    (sort (fn [x y] (comp (keyfn x) (keyfn y))) coll)))
 
 ;; parse-uuid: nil unless s is a canonical 8-4-4-4-12 hex UUID string; throws
@@ -66,10 +61,9 @@
    \backspace "backspace" \space "space"})
 (defn char-name-string [c] (get char-name-strings c))
 
-;; Random selection over the host rand primitives — the reference shape:
+;; Random selection over the host rand primitives.
-;; nth directly (nil returns nil via RT.nth; a set throws like the JVM).
 (defn rand-nth [coll]
-  (nth coll (rand-int (count coll))))
+  (let [v (vec coll)] (nth v (rand-int (count v)))))
 
 (defn random-sample
   ([prob] (filter (fn [_] (< (rand) prob))))
@@ -354,8 +348,8 @@
 (defn clojure-version [] "1.11.0-jolt")
 
 ;; bigdec is a host fn (host/chez/java/bigdec.ss) — a real BigDecimal value type.
-;; numerator/denominator are host natives (converters.ss) over Chez's exact
+(defn numerator [x] (throw (ex-info "numerator requires a ratio (Jolt has no ratios)" {})))
-;; rationals; a non-ratio is the Ratio cast failure.
+(defn denominator [x] (throw (ex-info "denominator requires a ratio (Jolt has no ratios)" {})))
 
 ;; jolt has no reflection, but a few common JVM interfaces carry a modeled
 ;; ancestry (jolt.host/class-supers) so reflective checks like

jolt-core/clojure/core/22-coll.clj

@@ -89,21 +89,6 @@
              (recur nxt (next ks))))
          m)))))
 
-(defn req!
-  "Returns the value mapped to key k in map m, like `get`, but throws
-  IllegalArgumentException when k is not present. Unlike `get`, does not nil-pun:
-  a key present with a nil value returns nil, an absent key throws. The primitive
-  behind checked-keys destructuring (:keys! / :syms! / :strs!)."
-  {:added "1.13"}
-  [m k]
-  ;; a fresh map is its own identity, so a present-but-nil value is distinguished
-  ;; from an absent key (same trick as get-in's sentinel).
-  (let [sentinel (hash-map)
-        v (get m k sentinel)]
-    (if (identical? sentinel v)
-      (throw (new IllegalArgumentException (str "Expected key: " k)))
-      v)))
-
 ;; find-based, so nil RESULTS are cached too; args canonicalize as a collection key.
 (defn memoize [f]
   (let [mem (atom (hash-map))]
@@ -151,9 +136,6 @@
     ;; a deftype/record with its own empty (IPersistentCollection) — e.g.
     ;; data.priority-map — uses it, before the generic map/set/vector arms.
     (jolt.host/jrec-method? coll "empty") (.empty coll)
-    ;; a defrecord without its own empty can't have one (RT: UnsupportedOperation)
-    (record? coll) (throw (new UnsupportedOperationException
-                               (str "Can't create empty: " (.getName (class coll)))))
     (sorted? coll) ((get (jolt.host/ref-get coll :ops) :empty) coll)
     (map? coll) (with-meta {} (meta coll))
     (set? coll) (with-meta #{} (meta coll))
@@ -348,8 +330,7 @@
 ;; stays an unevaluated reader form on jolt and contains? can't see into it.
 (def ^:private special-syms
   #{'if 'do 'let* 'fn* 'quote 'var 'def 'loop* 'recur 'throw 'try 'catch
-    'finally 'new 'set! '. 'monitor-enter 'monitor-exit
+    'finally 'new 'set! '. 'monitor-enter 'monitor-exit})
-    '& 'case* 'deftype* 'letfn* 'reify*})
 
 (defn special-symbol? [s] (contains? special-syms s))
 

jolt-core/jolt/backend_scheme.clj

@@ -172,14 +172,6 @@
 (def var-cache? (atom false))
 (defn set-var-cache! [on] (reset! var-cache? on))
 
-;; Opt-in tail-frame history (JOLT_TRACE): emit a (jolt-trace-push! "name") at the
-;; head of every named fn body, so an entry records the frame into the runtime ring
-;; buffer (rt.ss) and a TCO-elided frame still shows in an error's backtrace. OFF
-;; during the seed mint and `jolt build` (byte-determinism + no runtime cost);
-;; compile-eval.ss turns it on for runtime-eval'd user code when JOLT_TRACE is set.
-(def trace-frames? (atom false))
-(defn set-trace-frames! [on] (reset! trace-frames? on))
-
 ;; A direct-link Scheme binding name for a var. The fqn maps to a unique identifier
 ;; jv$<ns>$<name>; chars that break a Scheme identifier or the `$` separator are
 ;; escaped so distinct vars never collide.
@@ -199,13 +191,6 @@
 ;; recursion auto-restores them (no manual save/restore, no throw-leak).
 (def ^:dynamic *recur-target* nil)
 (def ^:dynamic *known-procs* #{})
-;; True while emitting a node in TAIL position. Only used, in trace mode, to mark a
-;; tail call so the runtime routes its callee into the current history rib instead
-;; of a new one (rt.ss). It never affects semantics — a wrong value only mislabels
-;; a debug trace line — so partial propagation is safe. `emit` (the wrapper below)
-;; clears it by default; the tail-transparent forms (fn body, if/do/let/loop) pass
-;; it to their tail child. Default false so a top-level form is treated non-tail.
-(def ^:dynamic *tail?* false)
 
 (def ^:private gensym-counter (atom 0))
 (defn- fresh-label [prefix] (str prefix (swap! gensym-counter inc)))
@@ -268,17 +253,6 @@
     (if (or (contains? scheme-reserved s) (contains? bare-native-names s)) (str "_" s) s)))
 
 (declare emit)
-(declare emit*)
-;; Ops that pass tail position through to a child (the child can itself be a tail
-;; call): if/do carry it to their tail branch/last form, let/loop to their body,
-;; and invoke reads it to decide whether the call is tail. Every other op's
-;; children are non-tail, so `emit` clears *tail?* before dispatching them — that
-;; way a stray true can't leak into, say, a call sitting in a vector literal.
-(def ^:private tail-transparent-ops #{:if :do :let :loop :invoke})
-(defn emit [node]
-  (if (and *tail?* (not (tail-transparent-ops (:op node))))
-    (binding [*tail?* false] (emit* node))
-    (emit* node)))
 
 ;; A Chez string literal. Every char outside printable ASCII becomes a
 ;; codepoint hex escape \x<cp>; ; the named escapes (\n \t \r \" \\) match what
@@ -439,10 +413,9 @@
 ;; letfn lowers to a :let flagged :letrec (mutually-recursive named local fns):
 ;; Scheme `letrec*` binds them so each sees its siblings. A plain let uses let*.
 (defn- emit-let [node]
-  (let [kw (if (:letrec node) "letrec*" "let*")
+  (let [kw (if (:letrec node) "letrec*" "let*")]
-        ;; bindings are non-tail; the body inherits the let's tail position
+    (str "(" kw " (" (str/join " " (map emit-binding (:bindings node))) ") "
-        binds (binding [*tail?* false] (str/join " " (mapv emit-binding (:bindings node))))]
+         (emit (:body node)) ")")))
-    (str "(" kw " (" binds ") " (emit (:body node)) ")")))
 
 (defn- emit-loop [node]
   (let [label (fresh-label "loop")
@@ -450,10 +423,9 @@
         names (map #(munge-name (nth % 0)) pairs)
         ;; inits evaluate in the OUTER scope (recur-target unchanged) and, like
         ;; Clojure loop/let, SEQUENTIALLY — wrap a let* around the named let.
-        inits (binding [*tail?* false] (mapv #(emit (nth % 1)) pairs))
+        inits (map #(emit (nth % 1)) pairs)
         seq-bs (str/join " " (map (fn [n i] (str "(" n " " i ")")) names inits))
         rebinds (str/join " " (map (fn [n] (str "(" n " " n ")")) names))
-        ;; the loop body inherits the loop's tail position
         body (binding [*recur-target* label] (emit (:body node)))]
     (str "(let* (" seq-bs ") (let " label " (" rebinds ") " body "))")))
 
@@ -514,11 +486,7 @@
         params (map munge-name orig)
         restp (when-let [r (:rest a)] (munge-name r))
         label (fresh-label "fnrec")
-        ret (:ret-nhint a)
+        body (binding [*recur-target* label] (emit (:body a)))
-        ;; the body is the fn's tail position — UNLESS a ^double/^long return hint
-        ;; wraps it in a coercion below, which puts the body back in non-tail.
-        body-tail? (not (or (= ret :double) (= ret :long)))
-        body (binding [*recur-target* label *tail?* body-tail?] (emit (:body a)))
         paramlist (cond
                     (and restp (empty? params)) restp
                     restp (str "(" (str/join " " params) " . " restp ")")
@@ -543,16 +511,6 @@
         self (when-let [nm (:name node)] (munge-name nm))
         clauses (binding [*known-procs* (if self (conj *known-procs* self) *known-procs*)]
                   (mapv emit-arity-clause arities))
-        ;; trace mode: record this frame on entry (before the body), so a frame
-        ;; the body then tail-calls away is still in the ring at throw time. A
-        ;; `recur` re-enters via the named-let, not the lambda, so a tight loop
-        ;; records once, not per iteration.
-        clauses (if (and @trace-frames? self)
-                  (mapv (fn [c] [(nth c 0)
-                                 (str "(begin (jolt-trace-push! " (chez-str-lit self) ") "
-                                      (nth c 1) ")")])
-                        clauses)
-                  clauses)
         lambda (if (= 1 (count clauses))
                  (let [c (first clauses)] (str "(lambda " (nth c 0) " " (nth c 1) ")"))
                  (str "(case-lambda "
@@ -615,30 +573,7 @@
             (= (nth shape i) kw) i
             :else (recur (inc i))))))
 
-;; A plain Scheme application: (callee op ...).
-(defn- plain-call [callee operand-strs]
-  (str "(" callee (if (seq operand-strs) (str " " (str/join " " operand-strs)) "") ")"))
-;; A tail call in trace mode. Force-bind the operands to temps FIRST (so any
-;; operand whose own evaluation records a trace entry runs before our mark), THEN
-;; set the tail mark, THEN apply — the callee's entry prologue consumes the mark
-;; with nothing in between, so it can't be clobbered. Still a tail call: the let*'s
-;; last form is the application, so TCO is preserved.
-(defn- tail-marked-call [callee operand-strs]
-  (let [tmps (mapv (fn [_] (fresh-label "_tt$")) operand-strs)
-        binds (str/join " " (map (fn [t a] (str "(" t " " a ")")) tmps operand-strs))]
-    (str "(let* (" binds ") (jolt-trace-mark! #t) " (plain-call callee tmps) ")")))
-;; Emit a call, tail-marked when we're in tail position and tracing is on; a plain
-;; application otherwise. The mark is consumed by the callee's entry prologue —
-;; direct calls (:local known-proc, direct-link) always have one; a jolt-invoke
-;; call usually reaches one but not always (see the best-effort note in rt.ss).
-(defn- emit-call [tail? callee operand-strs]
-  (if (and @trace-frames? tail?)
-    (tail-marked-call callee operand-strs)
-    (plain-call callee operand-strs)))
-
 (defn- emit-invoke [node]
-  (let [tail? *tail?*]           ; capture: children below emit non-tail
-   (binding [*tail?* false]
   (let [fnode (:fn node)
         arg-nodes (:args node)
         args (mapv emit arg-nodes)
@@ -651,7 +586,8 @@
         ;; order [callee & args] together when ordering is observable.
         invoke (fn []
                  (ordered-call (cons fnode arg-nodes) (cons (emit fnode) args)
-                               (fn [operands] (emit-call tail? "jolt-invoke" operands))))]
+                               (fn [[f & as]]
+                                 (str "(jolt-invoke " f (if (seq as) (str " " (str/join " " as)) "") ")"))))]
     (cond
       ;; devirtualized protocol call: the inference proved the receiver (arg 0) is
       ;; one record type, so resolve the impl by that static tag instead of routing
@@ -700,16 +636,11 @@
         (if idx
           (order-args (fn [as] (str "(jrec-field-at " (first as) " " idx " " (emit fnode) ")")))
           (order-args (fn [as] (str "(jolt-get " (first as) " " (emit fnode) (defstr as) ")")))))
-      ;; (coll k [default]) -> lookup — coll (fnode) is the callee, evaluated
+      ;; (coll k [default]) -> (jolt-get coll k [default]) — coll (fnode) is the
-      ;; before the key/default args. A VECTOR literal invokes as nth (a bad
+      ;; callee, evaluated before the key/default args.
-      ;; index throws, IPersistentVector.invoke); maps/sets invoke as get.
       (= kind :coll)
       (ordered-call (cons fnode arg-nodes) (cons (emit fnode) args)
-                    (fn [[c & as]]
+                    (fn [[c & as]] (str "(jolt-get " c " " (str/join " " as) ")")))
-                      (str (if (and (= :vector (:op fnode)) (= 1 (count as)))
-                             "(jolt-nth "
-                             "(jolt-get ")
-                           c " " (str/join " " as) ")")))
       (and (stdlib-var? fnode) (not (deref prelude-mode?)))
       (throw (ex-info (str "emit: unsupported stdlib fn `" (:ns fnode) "/" (:name fnode)
                            "` (no core on Chez yet)") {}))
@@ -726,7 +657,8 @@
       ;; holds an arbitrary IFn -> dynamic dispatch.
       (= :local (:op fnode))
       (if (*known-procs* (munge-name (:name fnode)))
-        (order-args (fn [as] (emit-call tail? (munge-name (:name fnode)) as)))
+        (order-args (fn [as] (str "(" (munge-name (:name fnode))
+                                  (if (seq as) (str " " (str/join " " as)) "") ")")))
         (invoke))
       ;; closed-world direct call: the callee var is an app fn def already emitted
       ;; with a Scheme binding — apply it directly, no var lookup, no jolt-invoke.
@@ -735,7 +667,8 @@
       ;; below (which still uses the direct binding as the invoke target).
       (and (= :var (:op fnode)) (direct-linkable? (:ns fnode) (:name fnode))
            (direct-link-fn? (:ns fnode) (:name fnode)))
-      (order-args (fn [as] (emit-call tail? (dl-name (:ns fnode) (:name fnode)) as)))
+      (order-args (fn [as] (str "(" (dl-name (:ns fnode) (:name fnode))
+                                (if (seq as) (str " " (str/join " " as)) "") ")")))
       ;; a late-bound :var call head can hold a procedure OR a non-applicable
       ;; value the RT dispatches (multimethod, keyword/coll IFn) — route via
       ;; jolt-invoke (transparent for a procedure).
@@ -743,7 +676,7 @@
       (invoke)
       ;; a computed callee can yield ANY IFn — route through jolt-invoke.
       :else
-      (invoke))))))
+      (invoke))))
 
 ;; try/catch/finally. throw raises a Chez condition wrapping the jolt value
 ;; (jolt-throw = Scheme `raise` of a &jolt-throw condition); catch lowers to
@@ -790,22 +723,7 @@
        (returns-scheme-bool? (:body node) bools'))
      :else false)))
 
-;; In trace mode, a fn def also registers its source so the tail-frame history maps
+(defn emit [node]
-;; the recorded frame-name to "ns/name (file:line)" instead of a bare name. Keyed by
-;; the SAME munged name the entry push records (emit-fn's letrec self-binding = the
-;; fn's own name). Returns "" when off / not a positioned fn def, so trace-off output
-;; (seed mint, `jolt build`) is byte-identical. Direct-link builds already register
-;; via emit-def-cached; this covers the open-world eval path.
-(defn- trace-source-reg [node]
-  (let [init (:init node) pos (:pos node)]
-    (if (and @trace-frames? (= :fn (:op init)) (:name init) pos)
-      (str " (jolt-register-source! " (chez-str-lit (munge-name (:name init))) " "
-           (chez-str-lit (:ns node)) " " (chez-str-lit (:name node)) " "
-           (if (:file pos) (chez-str-lit (:file pos)) "jolt-nil") " "
-           (or (:line pos) 0) ")")
-      "")))
-
-(defn emit* [node]
   (case (:op node)
     :const (emit-const (:val node))
     :local (munge-name (:name node))
@@ -853,14 +771,11 @@
     :host-new (str "(host-new " (chez-str-lit (:class node))
                    (let [args (map emit (:args node))]
                      (if (empty? args) "" (str " " (str/join " " args)))) ")")
-    ;; the test is non-tail; then/else inherit the if's tail position
     :if (let [test (:test node)
-              t (binding [*tail?* false]
+              t (if (returns-scheme-bool? test) (emit test)
-                  (if (returns-scheme-bool? test) (emit test)
+                    (str "(jolt-truthy? " (emit test) ")"))]
-                      (str "(jolt-truthy? " (emit test) ")")))]
           (str "(if " t " " (emit (:then node)) " " (emit (:else node)) ")"))
-    ;; non-last statements are non-tail; the ret inherits the do's tail position
+    :do (str "(begin " (str/join " " (map emit (:statements node)))
-    :do (str "(begin " (binding [*tail?* false] (str/join " " (mapv emit (:statements node))))
              (if (empty? (:statements node)) "" " ") (emit (:ret node)) ")")
     :invoke (emit-invoke node)
     ;; collection literals -> rt constructors (collections.ss). Elements are
@@ -904,8 +819,7 @@
     :fn (emit-fn node)
     ;; (def name) with no init (declare): reserve the cell. A def with non-empty
     ;; reader metadata lowers to def-var-with-meta! (ported in a later increment).
-    :def (let [reg (trace-source-reg node)
+    :def (cond
-               d (cond
            (:no-init node)
            (str "(declare-var! " (chez-str-lit (:ns node)) " " (chez-str-lit (:name node)) ")")
            (jmeta-nonempty? (:meta node))
@@ -913,8 +827,7 @@
                 (emit-with-cells #(emit (:init node))) " " (emit-def-meta node) ")")
            :else
            (str "(def-var! " (chez-str-lit (:ns node)) " " (chez-str-lit (:name node)) " "
-                        (emit-with-cells #(emit (:init node))) ")"))]
+                (emit-with-cells #(emit (:init node))) ")"))
-           (if (= reg "") d (str "(begin " d reg ")")))
     (throw (ex-info (str "emit: op not yet ported / unhandled: " (pr-str (:op node))) {}))))
 
 ;; ^:dynamic / ^:redef on a def opts it out of direct-linking: it stays redefinable,

jolt-core/jolt/deps.clj

@@ -66,10 +66,6 @@
       (if-let [root (:deps/root spec)] (str checkout "/" root) checkout))
     (:jolt/module spec)
     (do (warn "skipping janet dependency " coord " (:jolt/module is obsolete on Chez)") nil)
-    ;; jolt IS Clojure — a dependency on org.clojure/clojure is satisfied
-    ;; intrinsically, so skip it silently rather than warning about the (unusable)
-    ;; :mvn/version coordinate.
-    (= coord 'org.clojure/clojure) nil
     :else
     (do (warn "skipping unsupported coordinate " coord " " (pr-str spec)) nil)))
 

jolt-core/jolt/main.clj

@@ -8,8 +8,6 @@
 
 (defn- project-dir [] (or (jolt.host/getenv "JOLT_PWD") "."))
 
-(defn- version [] (jolt.host/jolt-version))
-
 (defn- current-platform []
   (let [os (str/lower-case (or (System/getProperty "os.name") ""))]
     (cond (str/includes? os "mac") :darwin
@@ -147,10 +145,7 @@
   ;; loaded — same context a run gets, so (require '[some.lib]) works in the REPL.
   (try (apply-project! (deps/resolve-project (project-dir)))
        (catch :default _ nil))
-  ;; REPL-driven development: trace by default so an uncaught error in evaluated
+  (println ";; jolt repl — :repl/quit or ^D to exit")
-  ;; code shows a tail-frame backtrace, no JOLT_TRACE needed (JOLT_TRACE=0 opts out).
-  (jolt.host/enable-trace!)
-  (println (str ";; jolt " (version) " repl — :repl/quit or ^D to exit"))
   (loop []
     (let [form (repl-read-form)]
       (when form
@@ -163,9 +158,7 @@
                  (catch :default e
                    (println "error:" (or (ex-message e)
                                          (try ((resolve 'jolt.host/condition-message) e) (catch :default _ nil))
-                                         (pr-str e)))
+                                         (pr-str e)))))
-                   (when-let [bt (jolt.host/backtrace-string)]
-                     (print bt))))
             (recur)))))))
 
 ;; A deps.edn :tasks entry: a string is a shell command; a map is {:main-opts …}.
@@ -301,9 +294,7 @@
         (when stop (stop))))))
 
 (defn- usage []
-  (println (str "jolt " (version)))
   (println "usage: jolt <command> [args]")
-  (println "  -e EXPR                evaluate EXPR and print the result")
   (println "  run -m NS [args]       resolve deps.edn, load NS, call its -main")
   (println "  run FILE               load a Clojure file")
   (println "  build -m NS [-o OUT] [--opt|--dev] [--direct-link] [--tree-shake] [--dynamic]  compile a standalone binary")
@@ -313,7 +304,6 @@
   (println "  --nrepl-server [port]  start an nREPL server (default 7888) for editors")
   (println "  path                   print the resolved source roots")
   (println "  <task>                 run a deps.edn :tasks entry")
-  (println "  --version              print the jolt version")
   (println "  --help                 print this message"))
 
 (defn -main [& args]
@@ -322,7 +312,6 @@
       (nil? cmd)                  (usage)
       (= cmd "--help")            (usage)
       (= cmd "-h")                (usage)
-      (#{"--version" "-V"} cmd)   (println (str "jolt " (version)))
       (= cmd "run")               (cmd-run more)
       (= cmd "repl")              (repl)
       (= cmd "--nrepl-server")    (nrepl more)

jolt-core/jolt/nrepl.clj

@@ -21,66 +21,25 @@
             [jolt.ffi :as ffi]))
 
 ;; --- sockets (loopback server) ---------------------------------------------
-(def ^:private os-name
+;; Load libc (the running process's symbols) BEFORE the foreign-fn bindings below
-  (str/lower-case (or (System/getProperty "os.name") "")))
+;; — defcfn resolves the C entry point when the def is evaluated (at ns load), so
-(def ^:private macos?   (str/includes? os-name "mac"))
+;; the socket symbols must already be available.
-(def ^:private windows? (str/includes? os-name "win"))
+(ffi/load-library)
-
-;; Load the library that provides the socket symbols BEFORE the foreign-fn
-;; bindings below — defcfn resolves the C entry point when the def is evaluated
-;; (at ns load), so the symbols must already be available. POSIX: the running
-;; process's own libc symbols. Windows: the Winsock DLL (ws2_32), whose symbols
-;; are NOT in joltc.exe's export table even though it's linked in — without this
-;; explicit load, (ffi/defcfn c-socket "socket" ...) fails at load with
-;; "no entry for socket".
-(if windows?
-  (ffi/load-library "ws2_32.dll")
-  (ffi/load-library))
-
-;; A socket is an int fd on POSIX; on Win64 it's a SOCKET (uintptr_t) handle, but
-;; those are small kernel handle values that round-trip through :int, and the
-;; INVALID_SOCKET error sentinel (~0) reads back as -1 — so the fd checks below
-;; work unchanged on both.
 (ffi/defcfn c-socket     "socket"     [:int :int :int] :int)
 (ffi/defcfn c-bind       "bind"       [:int :pointer :int] :int)
 (ffi/defcfn c-listen     "listen"     [:int :int] :int)
 (ffi/defcfn c-setsockopt "setsockopt" [:int :int :int :pointer :int] :int)
-(ffi/defcfn c-accept     "accept"     [:int :pointer :pointer] :int :blocking)
+  (ffi/defcfn c-accept     "accept"     [:int :pointer :pointer] :int :blocking)
-
-;; recv/send and the socket-close call differ by platform. Winsock's recv/send
-;; take an int length and return int (not ssize_t), and a socket is closed with
-;; closesocket, not close. A symbol that exists on only one OS (closesocket on
-;; Windows, close on POSIX) can only be bound there, so these live in the taken
-;; platform branch — jolt interns the vars from both branches at analysis time,
-;; so later references resolve either way.
-(if windows?
-  (do
-    (ffi/defcfn c-recv  "recv"        [:int :pointer :int :int] :int :blocking)
-    (ffi/defcfn c-send  "send"        [:int :pointer :int :int] :int :blocking)
-    (ffi/defcfn c-close "closesocket" [:int] :int)
-    ;; Winsock must be initialized once per process before any socket call.
-    (ffi/defcfn c-wsastartup "WSAStartup" [:int :pointer] :int))
-  (do
   (ffi/defcfn c-recv       "recv"       [:int :pointer :size_t :int] :ssize_t :blocking)
   (ffi/defcfn c-send       "send"       [:int :pointer :size_t :int] :ssize_t :blocking)
-    (ffi/defcfn c-close "close" [:int] :int)))
+(ffi/defcfn c-close      "close"      [:int] :int)
 
 (def ^:private AF-INET 2)
 (def ^:private SOCK-STREAM 1)
-;; SOL_SOCKET / SO_REUSEADDR: 0xffff / 4 on macOS and Windows, 1 / 2 on Linux.
+(def ^:private macos?
-(def ^:private sol-socket (if (or macos? windows?) 0xffff 1))
+  (str/includes? (str/lower-case (or (System/getProperty "os.name") "")) "mac"))
-(def ^:private so-reuse   (if (or macos? windows?) 4 2))
+(def ^:private sol-socket (if macos? 0xffff 1))
-
+(def ^:private so-reuse   (if macos? 4 2))
-;; Initialize Winsock (a no-op off Windows). WSAStartup is refcounted and must
-;; precede any socket call; WSADATA is ~408 bytes on x64, so 512 is ample.
-(defn- ensure-winsock! []
-  (when windows?
-    (let [wsadata (ffi/alloc 512)]
-      (try
-        (let [r (c-wsastartup 0x0202 wsadata)]
-          (when-not (zero? r)
-            (throw (ex-info (str "WSAStartup failed: " r) {}))))
-        (finally (ffi/free wsadata))))))
 
 (defn- make-sockaddr [port]
   (let [sa (ffi/alloc 16)]
@@ -94,7 +53,7 @@
     sa))
 
 (defn- listen-socket [port]
-  (ensure-winsock!)                                          ; no-op off Windows
+  (ffi/load-library)                                         ; libc process symbols
   (let [fd (c-socket AF-INET SOCK-STREAM 0)]
     (when (neg? fd) (throw (ex-info "socket() failed" {})))
     (let [opt (ffi/alloc 4)] (ffi/write opt :int 0 1) (c-setsockopt fd sol-socket so-reuse opt 4) (ffi/free opt))
@@ -188,10 +147,7 @@
               (try (when (and ns-str (not (str/blank? ns-str)) (find-ns (symbol ns-str)))
                      (in-ns (symbol ns-str)))
                    (reset! result (load-string code))
-                   (catch :default e
+                   (catch :default e (reset! err (err-msg e)))))]
-                     (reset! err (str (err-msg e)
-                                      (when-let [bt (jolt.host/backtrace-string)]
-                                        (str "\n" bt)))))))]
     {:value (when (nil? @err) (pr-str @result))
      :out out
      :ns (str (ns-name *ns*))
@@ -280,17 +236,11 @@
   no-op."
   ([port] (start port nil))
   ([port middleware]
-   ;; An nREPL session is REPL-driven development: trace by default so an uncaught
-   ;; error in code evaluated over the connection shows a tail-frame backtrace, with
-   ;; no JOLT_TRACE needed. Covers both `--nrepl-server` and an app that starts its
-   ;; own server under `-M:run` (reload a namespace to trace already-loaded code).
-   (jolt.host/enable-trace!)
    (let [handler (build-handler (resolve-middleware (or middleware [])))
          fd (listen-socket port)                  ; throws on bind/listen failure
          stopped (atom false)]
      (try (spit ".nrepl-port" (str port)) (catch :default _ nil))
-     (println (str "jolt " (jolt.host/jolt-version) " nREPL server started on port "
+     (println (str "nREPL server started on port " port " (127.0.0.1) — .nrepl-port written"))
-                   port " (127.0.0.1) — .nrepl-port written"))
      (when (seq middleware) (println (str ";; middleware: " (str/join " " middleware))))
      (println ";; connect your editor; ^C to stop")
       (future

stdlib/clojure/edn.clj

@@ -16,15 +16,7 @@
     ;; Reader FORMS are detected by :jolt/type tag, never by map? — strict map?
     ;; (correctly) excludes tagged structs, so the old (and (map? x) ...) guard
     ;; would skip them.
-    (= :jolt/set (get x :jolt/type))
+    (= :jolt/set (get x :jolt/type)) (with-meta (set (map (fn [v] (edn->value opts v)) (get x :value))) (edn->value opts (meta x)))
-      (let [vs (map (fn [v] (edn->value opts v)) (get x :value))
-            st (set vs)]
-        ;; duplicate literal elements are invalid edn
-        (when (< (count st) (count vs))
-          (throw (new IllegalArgumentException
-                      (str "Duplicate key: " (pr-str (some (fn [[k n]] (when (< 1 n) k))
-                                                           (frequencies vs)))))))
-        (with-meta st (edn->value opts (meta x))))
     ;; Tagged elements: a reader from the :readers opt wins, then the built-in
     ;; data readers (#uuid/#inst + registered); an unknown tag falls to the
     ;; :default opt fn (called with tag and value, as in Clojure) or throws.
@@ -38,9 +30,6 @@
             custom (get (get opts :readers) tag-sym)]
         (cond
           custom (custom v)
-          ;; the built-in edn tags win over :default (a :readers entry can
-          ;; override them; an unknown-tag :default never sees #inst/#uuid)
-          (contains? #{'inst 'uuid 'bigdec} tag-sym) (__read-tagged tag v)
           ;; Clojure calls :default with the tag as a SYMBOL and the value.
           (get opts :default) ((get opts :default) tag-sym v)
           :else (__read-tagged tag v)))
@@ -50,30 +39,25 @@
     ;; a constructed set: recurse into its elements too, so a tagged literal
     ;; inside #{…} gets the :readers/:default treatment (aero's #ref in a set).
     (set? x) (with-meta (set (map (fn [v] (edn->value opts v)) x)) (edn->value opts (meta x)))
-    ;; edn lists are lists (list? holds), not lazy seqs
+    (seq? x) (with-meta (map (fn [v] (edn->value opts v)) x) (edn->value opts (meta x)))
-    (seq? x) (with-meta (apply list (map (fn [v] (edn->value opts v)) x)) (edn->value opts (meta x)))
     :else x))
 
 ;; Private helper, NOT named read-string: an unqualified (read-string …) call
 ;; dispatches the core read-string SPECIAL FORM (by name, regardless of ns), so
 ;; the 1-arity can't delegate to the 2-arity through that name.
 (defn- read-edn [opts s]
-  ;; the strict edn seam: no auto-resolved keywords, invalid tokens throw, and
+  (if (or (nil? s) (cstr/blank? s))
-  ;; each #_ discard is validated through the same :readers/:default pipeline.
+    (get opts :eof nil)
-  ;; EOF (blank/comment-only/nil input) honors :eof; an opts map WITHOUT :eof
+    ;; read the RAW form (tagged/set literals stay forms) so edn->value applies
-  ;; makes end-of-input an error, like the reference.
+    ;; every #tag through :readers/:default — read-string would build the built-in
-  (let [v (__read-form-edn s (fn [form] (edn->value opts form) nil))]
+    ;; #inst/#uuid eagerly, ignoring an override and failing on a non-string form.
-    (if (= v :jolt/reader-eof)
+    (edn->value opts (__read-form-raw s))))
-      (if (contains? opts :eof)
-        (get opts :eof)
-        (throw (ex-info "EOF while reading" {})))
-      (edn->value opts v))))
 
 (defn read-string
-  "Reads one object from the string s. The no-opts arity returns nil at end of
+  "Reads one object from the string s. Returns the :eof option value (default
-  input; with an opts map, :eof sets the value returned at end of input and its
+  nil) for nil or blank input. opts is an options map; :eof sets the value
-  absence makes end-of-input an error."
+  returned at end of input."
-  ([s] (read-edn {:eof nil} s))
+  ([s] (read-edn {} s))
   ([opts s] (read-edn opts s)))
 
 (defn- drain-reader

test/chez/README.md

@@ -7,7 +7,7 @@ test` from the repo root.
 
 ## The spec corpus
 
-`corpus.edn` is the contract: ~3570 rows `{:suite :label :expected :actual :portability}`, with
+`corpus.edn` is the contract: ~2920 rows `{:suite :label :expected :actual}`, with
 `:expected` sourced from reference JVM Clojure by `test/conformance/regen-corpus.clj`.
 It is frozen (the canonical source) — add or change cases here, then re-source the
 answers with `regen-corpus.clj` and re-certify with `test/conformance/certify.clj`.
@@ -22,7 +22,7 @@ answers with `regen-corpus.clj` and re-certify with `test/conformance/certify.cl
 
       chez --script host/chez/run-corpus.ss
       JOLT_CORPUS_LIMIT=200 …            # every-Nth stride, fast iteration
-      JOLT_CHEZ_ZJ_FLOOR=N …            # override the floor (see run-corpus.ss)
+      JOLT_CHEZ_ZJ_FLOOR=N …            # override the floor (default 2678)
 
 - `run-unit.ss` — host-specific unit cases (`test/chez/unit.edn`) that aren't in the
   JVM-portable corpus: dot-forms, java statics, io, reader, walk, vars/namespaces,

test/chez/cts-known-failures.txt

@@ -5,28 +5,56 @@ clojure.core-test.abs 1 0
 clojure.core-test.add-watch 0 1
 clojure.core-test.bigint 6 0
 clojure.core-test.bit-set 1 0
+clojure.core-test.compare 1 0
+clojure.core-test.conj 1 0
+clojure.core-test.contains-qmark 3 0
+clojure.core-test.counted-qmark 1 0
 clojure.core-test.dec 1 0
+clojure.core-test.denominator 0 3
 clojure.core-test.double-qmark 3 0
+clojure.core-test.empty 1 0
 clojure.core-test.eq 2 0
+clojure.core-test.eval 0 3
+clojure.core-test.even-qmark 1 0
 clojure.core-test.float 1 0
+clojure.core-test.get 0 1
 clojure.core-test.inc 1 0
 clojure.core-test.int-qmark 3 0
-clojure.core-test.lazy-seq 1 2
+clojure.core-test.intern 2 0
+clojure.core-test.keys 0 4
+clojure.core-test.lazy-seq 3 0
 clojure.core-test.minus 2 0
-clojure.core-test.mod 18 0
+clojure.core-test.mod 23 0
 clojure.core-test.neg-int-qmark 1 0
 clojure.core-test.not-eq 3 0
-clojure.core-test.num 2 0
+clojure.core-test.nth 0 1
+clojure.core-test.num 2 1
+clojure.core-test.number-qmark 3 0
+clojure.core-test.numerator 0 3
+clojure.core-test.odd-qmark 1 0
 clojure.core-test.parse-uuid 3 0
-clojure.core-test.peek 1 0
+clojure.core-test.peek 2 0
 clojure.core-test.plus 11 0
 clojure.core-test.plus-squote 11 0
+clojure.core-test.pop 0 1
 clojure.core-test.pos-int-qmark 1 0
-clojure.core-test.quot 25 0
+clojure.core-test.quot 30 0
-clojure.core-test.realized-qmark 1 0
+clojure.core-test.rand-nth 0 1
-clojure.core-test.rem 16 0
+clojure.core-test.rational-qmark 3 0
+clojure.core-test.realized-qmark 3 0
+clojure.core-test.rem 21 0
 clojure.core-test.remove-watch 0 1
+clojure.core-test.run-bang 1 0
+clojure.core-test.select-keys 2 0
+clojure.core-test.seqable-qmark 1 0
+clojure.core-test.shuffle 1 0
+clojure.core-test.sort-by 2 0
+clojure.core-test.special-symbol-qmark 4 0
 clojure.core-test.star 13 0
 clojure.core-test.star-squote 13 0
-clojure.core-test.transient 4 0
+clojure.core-test.transient 23 0
+clojure.core-test.update 1 0
+clojure.core-test.vals 0 3
 clojure.core-test.vec 1 0
+clojure.core-test.when-let 1 0
+clojure.edn-test.read-string 46 5

test/chez/unit.edn

@@ -576,26 +576,4 @@
   {:suite "deftype-method" :expr "(do (defprotocol P (m [_ o])) (defrecord R [n] P (m [_ _] n)) (m (->R 5) :x))" :expected "5"}
   {:suite "deftype-method" :expr "(do (defprotocol P2 (m2 [_ o])) (deftype T [n] P2 (m2 [_ _] n)) (m2 (->T 7) :x))" :expected "7"}
   {:suite "protocol-host" :expr "(do (defprotocol Q (e [_])) (extend-protocol Q clojure.lang.Var (e [_] :var)) [(satisfies? Q (var map)) (e (var map))])" :expected "[true :var]"}
-
-  ;; Clojure 1.13 (1.13.0-alpha1) parity. Ahead of the JVM 1.12.5 the corpus
-  ;; certifies against, so these live here rather than as certified corpus rows.
-  {:suite "clj-1.13 req!" :expr "(req! {:a 1} :a)" :expected "1"}
-  {:suite "clj-1.13 req!" :expr "(req! [10 20 30] 1)" :expected "20"}
-  {:suite "clj-1.13 req!" :expr "(nil? (req! {:a nil} :a))" :expected "true"}
-  {:suite "clj-1.13 req!" :expr "(req! {:a 1} :b)" :expected :throws}
-  {:suite "clj-1.13 amp-binding" :expr "(let [& 42] &)" :expected :throws}
-  {:suite "clj-1.13 amp-binding" :expr "(loop [& 42] &)" :expected :throws}
-  {:suite "clj-1.13 checked-keys" :expr "(let [{:keys! [a b]} {:a 1 :b 2}] [a b])" :expected "[1 2]"}
-  {:suite "clj-1.13 checked-keys" :expr "(let [{:keys! [a b]} {:a 1}] [a b])" :expected :throws}
-  {:suite "clj-1.13 checked-keys" :expr "(nil? (let [{:keys! [a]} {:a nil}] a))" :expected "true"}
-  {:suite "clj-1.13 checked-keys" :expr "(let [{:strs! [a]} {\"a\" 5}] a)" :expected "5"}
-  {:suite "clj-1.13 checked-keys" :expr "(let [{:keys! [a & b]} {:a 1 :b 2}] a)" :expected "1"}
-  {:suite "clj-1.13 checked-keys" :expr "(let [{:keys! [a & b]} {:a 1}] a)" :expected :throws}
-  {:suite "clj-1.13 checked-keys" :expr "(let [{:keys [a & b]} {:a 1 :b 2}] a)" :expected "1"}
-  {:suite "clj-1.13 checked-keys" :expr "(let [{:foo/keys! [a]} {:foo/a 7}] a)" :expected "7"}
-  {:suite "clj-1.13 checked-keys" :expr "(let [{:foo/keys! [a]} {}] a)" :expected :throws}
-  {:suite "clj-1.13 array-map-64" :expr "(keys {:a 1 :b 2 :c 3 :d 4 :e 5 :f 6 :g 7 :h 8 :i 9 :j 10})" :expected "(:a :b :c :d :e :f :g :h :i :j)"}
-  {:suite "clj-1.13 array-map-64" :expr "(= (map (fn [i] (keyword (str \"k\" i))) (range 20)) (keys (into {} (map (fn [i] [(keyword (str \"k\" i)) i]) (range 20)))))" :expected "true"}
-  {:suite "clj-1.13 array-map-64" :expr "(= (map (fn [i] (keyword (str \"k\" i))) (range 64)) (keys (reduce (fn [m i] (assoc m (keyword (str \"k\" i)) i)) {} (range 64))))" :expected "true"}
-  {:suite "clj-1.13 array-map-64" :expr "(= (map (fn [i] (keyword (str \"k\" i))) (range 65)) (keys (into {} (map (fn [i] [(keyword (str \"k\" i)) i]) (range 65)))))" :expected "false"}
 ]

test/conformance/SPEC.md

@@ -10,7 +10,7 @@ read one data file, run each case, compare, report.
 
 | File | Role | Generated by |
 |------|------|--------------|
-| `test/chez/corpus.edn` | **The spec.** ~3570 cases of `{:suite :label :expected :actual :portability}`, `:expected` **sourced from reference JVM Clojure**. | `test/conformance/regen-corpus.clj` |
+| `test/chez/corpus.edn` | **The spec.** ~2900 cases of `{:suite :label :expected :actual}`, `:expected` **sourced from reference JVM Clojure**. | `test/conformance/regen-corpus.clj` |
 | `test/conformance/profile.edn` | Per-case **feature classification** — which non-portable cases need which host capability. | `certify.clj --profile` |
 | `test/conformance/known-divergences.edn` | The few rows whose JVM value is an opaque host object that can't round-trip to readable source (Java arrays/transients/atoms/beans/proxies print as `#object[..@addr]`), so the corpus keeps jolt's value. | `regen-corpus.clj` leftovers, hand-checked |
 | `test/conformance/regen-corpus.clj` | Sources every `:expected` from reference **JVM Clojure** in one process. | — |
@@ -27,14 +27,8 @@ the canonical, frozen contract**: it is what every runtime consumes, what
 {:suite    "numbers / arithmetic"      ; grouping; "<suite> :: <label>" is the case id
  :label    "integer add"               ; unique within a suite
  :actual   "(+ 1 2)"                    ; Clojure source to evaluate
- :expected    "3"                       ; Clojure source whose value it must equal,
+ :expected "3"}                         ; Clojure source whose value it must equal,
                                         ; or the keyword :throws
- :portability :common}                  ; :common = portable Clojure any dialect
-                                        ; must satisfy; :jvm = exercises host
-                                        ; interop (java.*/clojure.lang.* classes,
-                                        ; dot forms, ctors, statics, arrays,
-                                        ; proxy/bean) — skip on a non-JVM-shaped
-                                        ; dialect
 ```
 
 - `[:suite :label]` is the **canonical, unique case id** (the generator
@@ -54,8 +48,8 @@ the canonical, frozen contract**: it is what every runtime consumes, what
 Historically every `:expected` was hand-written. `certify.clj` removes that
 weakness: it evaluates every `:actual` (and `:expected`) on **JVM Clojure** in a
 fresh `user` namespace and checks jolt's `:expected` against what real Clojure
-produces. Of ~3400 vanilla-certifiable rows, **all but ~26 allowlisted rows
+produces. Of ~2740 vanilla-certifiable rows, **>2730 match reference Clojure
-match reference Clojure exactly**. The rest are classified (see below) — none are silently wrong.
+exactly**. The rest are classified (see below) — none are silently wrong.
 
 ```sh
 clojure -M test/conformance/certify.clj                                  # gate
@@ -211,39 +205,3 @@ corpus`.
   deliberate delta (classify it in `known-divergences.edn`).
 - **Refresh the profile**: re-run with `--profile test/conformance/profile.edn`.
 - **Re-floor the runtime gate** when parity rises (`host/chez/run-corpus.ss`).
-
-## clojure-test-suite baseline traceability
-
-Every residual entry in `test/chez/cts-known-failures.txt` traces to one
-documented model divergence — nothing in the baseline is an unexplained bug:
-
-- `:integer-box-model` (this file, above): every `big-int?`/`instance?
-  Byte…BigInt` class check, the overflow-throw rows (`(+ max-long 1)` is a
-  bignum, not ArithmeticException — abs/inc/dec/minus/plus/star/quot/rem/mod/
-  bit-set and the `+'`/`*'` promotion-identity namespaces), boxed-identity
-  rows (`(identical? (Boolean. "true") true)`, `(= x x)` on a boxed NaN — jolt
-  numbers are immediates, there is no box to distinguish), and `num`'s
-  primitive-overload reflection rows.
-- **no single float** (Narrow integer types, above): `(float Double/MIN_VALUE)`
-  keeps the double value instead of rounding to 0.0f; `(double? (float x))`
-  is true.
-- **RFC 0003 transients**: `(transient sorted/list/lazy-seq)` succeeds through
-  the copy-on-write fallback (a deliberate superset; non-collections now throw
-  like the JVM), and double-transient is idempotent rather than throwing.
-- `:seq-type-model`/`:chunking-model` (Seq semantics, above): `realized?` on
-  the rest of a realized chain (a plain seq cell on jolt, a cached LazySeq on
-  the JVM), `p/lazy-seq?` on forced rest chains, and chunk-granularity
-  realization counts (lazy-seq namespace).
-- **stm-refs** (`coverage.md`): the `(ref …)`/`dosync` sections of the watch
-  namespaces (add-watch/remove-watch) — refs are out of scope pending the
-  concurrency design note.
-- **parse-uuid strictness** (spec §9, parse-uuid S3): jolt is deliberately
-  strict where the reference's java.util.UUID accepts non-canonical forms
-  like `"0-0-0-0-0"`.
-- **vec of an array copies**: the reference ADOPTS an Object array (mutating
-  the array mutates the vector); jolt copies — immutable semantics win over
-  the implementation leak (`vec` namespace, one row).
-
-
-A future change that makes any of these rows pass will fail the cts gate as
-STALE, forcing this section and the baseline to be updated together.

test/conformance/regen-corpus.clj

@@ -99,12 +99,11 @@
       [row :kept])))
 
 ;; --- corpus writer (preserves the one-row-per-line layout) -------------------
-(defn row-str [{:keys [suite label expected actual portability]}]
+(defn row-str [{:keys [suite label expected actual]}]
   (str "  {:suite " (pr-str suite)
        " :label " (pr-str label)
        " :expected " (if (= expected :throws) ":throws" (pr-str expected))
-       " :actual " (pr-str actual)
+       " :actual " (pr-str actual) "}"))
-       (when portability (str " :portability " portability)) "}"))
 
 (defn -main [& _]
   (let [corpus (edn/read-string (slurp corpus-path))