sequence and transduce were seed natives nil on the prelude; the stateful
transducer arities (take-nth/map-indexed/partition-by, overlay) drive a
volatile via volatile!/vswap!/vreset!/deref, also unshimmed — so the whole
(sequence xform coll) / (transduce xform f coll) surface crashed.
natives-xform.ss: native volatiles (a jvol record + volatile!/vreset!/
vswap!/volatile? + a deref arm); transduce/sequence built on the existing
into-xform / reduce-seq. The overlay vreset!/vswap!/volatile? drive a
volatile through ref-put!/:jolt/type (tagged-table only), so they're
overridden natively in post-prelude.ss.
driver.janet: drain each chez pipe to EOF instead of a single ev/read. A
program with a stdout side effect (newline) flushes in two writes and a
lone ev/read sometimes caught only the first chunk, dropping the trailing
value — an intermittent gate divergence. Now reads until the pipe closes.
Prelude parity 1886 -> 1898, 0 new divergences. Floor raised to 1898.
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