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Compilation panic with array of contref

wasm-proposal:stack-switchingIssues related to WebAssembly stack switchingIssues related to WebAssembly stack switching

Status: Open.

#13022 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 9, 2026

Missing contref handling in VMArrayRef::read_elem

wasm-proposal:stack-switchingIssues related to WebAssembly stack switchingIssues related to WebAssembly stack switching

Status: Open.

#13021 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 9, 2026

VMContinuationStack::initialize likely wants some defense-in-depth bounds checks

wasm-proposal:stack-switchingIssues related to WebAssembly stack switchingIssues related to WebAssembly stack switching

Status: Open.

#13020 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 9, 2026

Invalid CLIF created through optimizations

fuzz-bugBugs found by a fuzzerBugs found by a fuzzer

Status: Open.

#13006 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 9, 2026

Using n in LLDB seems to equate to continue

wasmtime:debuggingIssues related to debugging of JIT'ed codeIssues related to debugging of JIT'ed code

Status: Open.

#12995 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 9, 2026

c-api: wasmtime_call_future_poll uses Waker::noop()

Status: Open.

#12991 In bytecodealliance/wasmtime;

· chaynabors opened on Apr 8, 2026

Support Limiting of Host Heap Usage when using ResourceTable

Status: Open.

#12984 In bytecodealliance/wasmtime;

· posborne opened on Apr 7, 2026

Cranelift: excessively large constant pools and deferred traps can cause MachBuffer assertion failures

Status: Open.

#12968 In bytecodealliance/wasmtime;

· cfallin opened on Apr 6, 2026

GC tracing with DRC collector creates excessively large allocations

fuzz-bugBugs found by a fuzzerBugs found by a fuzzer

wasm-proposal:gcIssues with the implementation of the gc wasm proposalIssues with the implementation of the gc wasm proposal

Status: Open.

#12958 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 3, 2026

Cranelift: Stack-Switching support - GC types are not supported with contref fields

bugIncorrect behavior in the current implementation that needs fixingIncorrect behavior in the current implementation that needs fixing

craneliftIssues related to the Cranelift code generatorIssues related to the Cranelift code generator

wasm-proposal:stack-switchingIssues related to WebAssembly stack switchingIssues related to WebAssembly stack switching

Status: Open.

#12941 In bytecodealliance/wasmtime;

· alex28sh opened on Apr 2, 2026

fd_seek on FIFO returns 0 instead of -1

bugIncorrect behavior in the current implementation that needs fixingIncorrect behavior in the current implementation that needs fixing

Status: Open.

#12913 In bytecodealliance/wasmtime;

· antocuni opened on Mar 31, 2026

wasi:fs mutate-directory ignored

wasi:implIssues pertaining to WASI implementation in WasmtimeIssues pertaining to WASI implementation in Wasmtime

Status: Open.

#12912 In bytecodealliance/wasmtime;

· MendyBerger opened on Mar 31, 2026