Update wasip3 WITs to 0.3.0-rc-2026-03-15#774
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alexcrichton merged 5 commits intoWebAssembly:mainfrom Mar 18, 2026
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* Handle optional string payloads throughout error codes by deallocating the string when it's mapped to a wasi-libc error. This involved changing a lot of functions that took a bare error code to instead take a pointer-to-an-error-code to ensure the original storage is updated to not have a string and reflects the original source of truth. * Functions to write a stream of bytes to an object, e.g. writing bytes to a file, have been updated for a new idiom where `async func`-style functions are replaced with sync-function-returns-`future` in a few places.
Needed for this new wasip3 snapshot
dicej
approved these changes
Mar 18, 2026
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This requires a number of changes throughout the code and additionally requires an updated version of Wasmtime. For now this PR uses the
devrelease but that'll get published as Wasmtime 43.0.0 in a few days.