Wasmtime GitHub notifications bot (Apr 10 2026 at 16:12): Wasmtime GitHub notifications bot (Apr 10 2026 at 16:12):alexcrichton opened PR #13038 from alexcrichton:fix-shared-memory-panic to bytecodealliance:main:
This fixes a panic due to the
Instantdeadline not being representable when the timeout duration isDuration::MAX. The solution here is to usechecked_addand pretend there's no timeout on overflow since that's waiting long enough to effectively have no timeout. This is not reachable from WebAssembly as it can't represent long enough durations but is reachable via the embedder API. Additionally shared memories are gated by default, so this doesn't affect any default configuration.<!--
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Wasmtime GitHub notifications bot (Apr 10 2026 at 16:12):alexcrichton requested dicej for a review on PR #13038.
Wasmtime GitHub notifications bot (Apr 10 2026 at 16:12):alexcrichton requested wasmtime-core-reviewers for a review on PR #13038.
Wasmtime GitHub notifications bot (Apr 10 2026 at 16:39):dicej submitted PR review.
Wasmtime GitHub notifications bot (Apr 10 2026 at 16:44):alexcrichton added PR #13038 Fix panic in atomic_wait{32,64} with massive timeouts to the merge queue.
Wasmtime GitHub notifications bot (Apr 10 2026 at 17:18):alexcrichton merged PR #13038.
Wasmtime GitHub notifications bot (Apr 10 2026 at 17:18):alexcrichton removed PR #13038 Fix panic in atomic_wait{32,64} with massive timeouts from the merge queue.
Last updated: Apr 12 2026 at 23:10 UTC