compile-and-eval wrapped the compile step in a blanket protect — any failure,
including a genuine compiler bug, silently fell back to the interpreter and
hid behind a correct-looking result. Now only the analyzer's deliberate punt
signal (jolt/uncompilable: …) falls back; any other compile-step error
propagates.
Tightening this surfaced one accidental dependency: pre-kernel overlay forms
(00-syntax's destructure defn) trigger a compile while ensure-analyzer is
still gated, and the missing analyzer crashed var-get with a cryptic indexing
error that the blanket catch happened to convert into the designed interpret
fallback. That path now punts explicitly ("jolt/uncompilable: analyzer not
built (pre-kernel bootstrap)").
New unit test stubs jolt.analyzer/analyze to prove a non-punt error
propagates while the punt channel still falls back.
Gate: conformance 269x3, fallback-zero, fixpoint stage1==2==3, self-host,
sci-bootstrap, staged-bootstrap, all specs+unit, suite 4046>=4034 (5 timeouts);
core-bench A/B neutral (4562 vs 4572 ms).
