Stream: git-wasmtime

Topic: wasmtime / issue #12352 crash running all the wasmtime an...

Wasmtime GitHub notifications bot (Jan 14 2026 at 23:42):

lukewagner opened issue #12352:

Running this command on the current dev release of wasmtime:

wasmtime wast -W component-model-async=y -W component-model-async-builtins=y -W component-model-threading=y -W component-model-async-stackful=y -W exceptions=y wasmtime/*.wast wasm-tools/*.wast

on the main branch of the component-model repo in the test directory currently crashes with this message:

thread 'main' (639680) panicked at crates/wast/src/wast.rs:569:13:
assertion failed: prev.is_none()

Running wasmtime/*.wast or wasm-tools/*.wast independently passes, so it's some interaction between the tests in both directories that seems to cause the failure.

Wasmtime GitHub notifications bot (Jan 14 2026 at 23:42):

lukewagner added the bug label to Issue #12352.

Wasmtime GitHub notifications bot (Jan 15 2026 at 15:49):

alexcrichton assigned alexcrichton to issue #12352.

Wasmtime GitHub notifications bot (Jan 15 2026 at 15:53):

alexcrichton commented on issue #12352:

Should be fixed in https://github.com/bytecodealliance/wasmtime/pull/12358, thanks for reporting! We unfortunately don't have great coverage of the multi-file form of wasmtime wast which is probably how this leaked through

Wasmtime GitHub notifications bot (Jan 15 2026 at 17:50):

alexcrichton closed issue #12352:

Running this command on the current dev release of wasmtime:

wasmtime wast -W component-model-async=y -W component-model-async-builtins=y -W component-model-threading=y -W component-model-async-stackful=y -W exceptions=y wasmtime/*.wast wasm-tools/*.wast

on the main branch of the component-model repo in the test directory currently crashes with this message:

thread 'main' (639680) panicked at crates/wast/src/wast.rs:569:13:
assertion failed: prev.is_none()

Running wasmtime/*.wast or wasm-tools/*.wast independently passes, so it's some interaction between the tests in both directories that seems to cause the failure.

Last updated: Jan 29 2026 at 13:25 UTC