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v40.0.3: Release Wasmtime 40.0.3 (#12433)

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v40.0.3
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40.0.3

Released 2026-01-26.

Fixed

  • Fixed a bug in lowering of f64.copysign on x86-64 whereby when combined
    with an f64.load, the resulting machine code could read 16 bytes rather
    than 8 bytes. This could result in a segfault when Wasmtime is configured
    without signals-based traps.
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