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[GC] assertion failed: types.is_subtype(actual_ty, expected_ty) #10398

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vouillon opened this issue Mar 14, 2025 · 1 comment · Fixed by #10456
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[GC] assertion failed: types.is_subtype(actual_ty, expected_ty) #10398

vouillon opened this issue Mar 14, 2025 · 1 comment · Fixed by #10456
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bug Incorrect behavior in the current implementation that needs fixing

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@vouillon
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Test Case

subtype.zip

Steps to Reproduce

Run the following command:

./target/debug/wasmtime  -W=all-proposals=y subtype.wasm

Expected Results

It should not crash.

Actual Results

We get a panic:

thread 'main' panicked at crates/wasmtime/src/runtime/vm/gc/func_ref.rs:81:13:
assertion failed: types.is_subtype(actual_ty, expected_ty)

Versions and Environment

Wasmtime commit: a3381e4

Operating system: Linux

Architecture: x64
@vouillon vouillon added the bug Incorrect behavior in the current implementation that needs fixing label Mar 14, 2025
@fitzgen fitzgen changed the title [GC] assertion failed: types.is_subtype(actual_ty, expected_ty) [GC] assertion failed: types.is_subtype(actual_ty, expected_ty) Mar 21, 2025
@fitzgen fitzgen mentioned this issue Mar 21, 2025
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@fitzgen
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fitzgen commented Mar 21, 2025

#10456 also fixes this one.

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bug Incorrect behavior in the current implementation that needs fixing
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Fix needs-stack-map propagation for variables' SSA block params fitzgen/wasmtime
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@fitzgen @vouillon