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Ran 13 May 2026 09:41PM UTC

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Committed 13 May 2026 09:39PM UTC coverage: 12.12%. Remained the same

Job # 25827998872.1

Build Type

push

github

Committed by

MagicalTux

Commit Message

vm: gate the bug53511 destructor call on slot-only bodies only

The catch-rebind DecRef I added in f69b8e4e ran unconditionally, but
ctx.OffsetSet (also called in dispatchTryHandler) already does an
IncRef/DecRef pair against the hashtable's previous value. For
non-slot-only bodies the hashtable held the old \$e, so OffsetSet's
DecRef ran and my explicit DecRef double-decremented — the object's
refcount went to -1, its ID was released twice, and subsequent
allocations grabbed reused IDs early. This was observable as object
ID drift in ext/gmp/gmp_mod and gmp_sub.

The double-DecRef only happens when the hashtable mirrors writes
(non-slot-only). Slot-only bodies skip ctx.OffsetSet in storeLocal so
the hashtable doesn't see the old value, OffsetSet doesn't DecRef,
and the explicit DecRef is exactly what's needed.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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