The guard skipped any exemplar carrying a `register __asm__("$N")` pin because templating it
cc1-CRASHED the sibling TUs (§42e). Phase 27 BYTE-PROVED that SIGABRT was `extract_unit` dropping the
body's file-scope macros — OUR bug — and fixed it (_carry_macros); its own roadmap delta then put the
PINS class "back on the mechanical-harvest table". The cause was removed and the default never
changed, so the guard kept skipping real work.
MEASURED THIS SESSION on one family: func_80175AB8 reported `skipped {'pinned-exemplar': 137}` and
then banked 133/137 the moment it was bypassed (R22 140/140). A protection whose cause is gone is not
free — it is a silent skip (R32) wearing a safety label, and the whole-binary byte-gate was always the
real arbiter here.
--allow-pins kept as an accepted no-op so existing recipes/docs keep working; --no-pins restores the
old behaviour. Negative control: --no-pins still reports `pinned-exemplar: 4`; the default stages them.
This is the THIRD stale default found today, after sweep_parallel being opt-in (8-16x throughput left
on the table) and conform_decls refusing a remedy it could perform. Same shape each time: correct when
written, cause since removed, still the default, opt-out only if you remember the flag.
Drew T
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