Swap memarg bit for HasBackingArrayMask and HasMemoryOrderMask#8905
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tlively
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Jul 15, 2026
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The fuzzer now errors on this bit change. Is that expected? |
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Should we disable fuzzing of that feature? |
stevenfontanella
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Jul 15, 2026
#8905 made a breaking change to the binary format for relaxed atomics + multibyte array access which hasn't been done in V8 yet. This is mostly a revert of #8664, except that relaxed atomics is left enabled in FUZZER_ARGS ([link](https://github.com/WebAssembly/binaryen/blob/578db5d8ada17bcb2f5ecee60f9049a2b68516fa/scripts/clusterfuzz/run.py#L83)), since other fuzzing targets (e.g. Binaryen) still support the changed binary representation. Part of #8904.
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Fixes #8904. See WebAssembly/relaxed-atomics#3.