Wasmtime GitHub notifications bot (Jun 30 2026 at 19:41): Wasmtime GitHub notifications bot (Jun 30 2026 at 19:41):fitzgen opened PR #13774 from fitzgen:copying-collector-semi-space-alignment-bug to bytecodealliance:main:
For GC heaps with >= 4GiB capacity, we clamp the capacity to
u32::MAXand then round it down so it is aligned. The previous rounding down only rounded toALIGN, which produced a capacity that was an odd multiple ofALIGN, which we then split in two for each semispace, which meant that each semispace was not aligned toALIGN(only aligned toALIGN/2). The fix is to round down to the next multiple of2*ALIGN.<!--
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Wasmtime GitHub notifications bot (Jun 30 2026 at 19:41):fitzgen requested alexcrichton for a review on PR #13774.
Wasmtime GitHub notifications bot (Jun 30 2026 at 19:41):fitzgen requested wasmtime-core-reviewers for a review on PR #13774.
Wasmtime GitHub notifications bot (Jun 30 2026 at 20:39)::thumbs_up: alexcrichton submitted PR review.
Wasmtime GitHub notifications bot (Jun 30 2026 at 20:39):alexcrichton added PR #13774 Fix copying collector's semi-space alignment rounding to the merge queue.
Wasmtime GitHub notifications bot (Jun 30 2026 at 21:04)::check: alexcrichton merged PR #13774.
Wasmtime GitHub notifications bot (Jun 30 2026 at 21:04):alexcrichton removed PR #13774 Fix copying collector's semi-space alignment rounding from the merge queue.
Last updated: Jul 29 2026 at 05:03 UTC