Issues

• Winch incorrectly reports an out-of-bound trap with some memory configuration

  winch
  bytecodealliance/wasmtime#14588 · Filter by author alexcrichton opened on Oct 6, 2026
  1

• Incorrect out-of-bounds traps with memory-may-move=n and imported memories

  bytecodealliance/wasmtime#14587 · Filter by author alexcrichton opened on Oct 6, 2026

• CoW initialization of memories incorrectly happens when element segments are out-of-bounds

  bytecodealliance/wasmtime#14585 · Filter by author alexcrichton opened on Oct 6, 2026

• Panic when a shared memory has an out-of-bounds fault

  wasm-proposal:threads
  bytecodealliance/wasmtime#14584 · Filter by author alexcrichton opened on Oct 6, 2026

• gc_ops fuzzbug: Table::grow panics on an unrooted Rooted init value instead of returning Err

  bugfuzz-bugwasm-proposal:gc
  bytecodealliance/wasmtime#14582 · Filter by author khagankhan opened on Oct 6, 2026
  1

• MPK: Segfault running an Engine on a preexisting thread

  wasmtime:pooling-allocator
  bytecodealliance/wasmtime#14581 · Filter by author alexcrichton opened on Oct 6, 2026

• Exceptions aren't turned into traps for component start functions

  wasm-proposal:component-modelwasm-proposal:exceptions
  bytecodealliance/wasmtime#14578 · Filter by author alexcrichton opened on Oct 6, 2026

• Hosts throwing exceptions into components encounters a bail_bug!

  wasm-proposal:component-modelwasm-proposal:exceptions
  bytecodealliance/wasmtime#14577 · Filter by author alexcrichton opened on Oct 6, 2026

• Internal do_no_suspend flag not correctly managed for sync-typed-tasks

  wasm-proposal:component-model-async
  bytecodealliance/wasmtime#14576 · Filter by author alexcrichton opened on Oct 6, 2026
  1

• riscv64: Model Zve capabilities for embedded vector support

  cranelift:area:riscv64
  bytecodealliance/wasmtime#14575 · Filter by author dotcom07 opened on Oct 6, 2026

• Cranelift: dead-store elimination removes a trapping store before a non-terminating loop

  bugcranelift
  bytecodealliance/wasmtime#14573 · Filter by author fitzgen opened on Oct 6, 2026
  1

• Cranelift: CLIF printer drops MemFlags on atomic_rmw and atomic_cas

  bugcranelift
  bytecodealliance/wasmtime#14572 · Filter by author fitzgen opened on Oct 6, 2026
  1

• Debug tags on try_call are dropped during lowering; guest-debug breakpoints fire unrequested with inlining

  bugcranelift:area:clifwasmtime:debugging
  bytecodealliance/wasmtime#14571 · Filter by author fitzgen opened on Oct 6, 2026
  1

• Cranelift: inliner does not remap user external names in symbol global values

  bugcranelift
  bytecodealliance/wasmtime#14570 · Filter by author fitzgen opened on Oct 6, 2026
  1

• Cranelift: inliner remaps dynamic types with the dynamic-stack-slot offset

  bugcranelift
  bytecodealliance/wasmtime#14569 · Filter by author fitzgen opened on Oct 6, 2026
  1

• Cranelift: interpreter traps on srem INT_MIN, -1 instead of returning 0

  bugcranelift:area:interpreter
  bytecodealliance/wasmtime#14568 · Filter by author fitzgen opened on Oct 6, 2026
  1

• Cranelift: (x >> k) << k mid-end rule emits iconst with a 64-bit vector type

  bugcranelift:mid-endisle
  bytecodealliance/wasmtime#14566 · Filter by author fitzgen opened on Oct 6, 2026
  1

• DRC leaks the array when ArrayRef::new fails its element type check

  wasm-proposal:gc
  bytecodealliance/wasmtime#14565 · Filter by author fitzgen opened on Oct 6, 2026
  1

• Guest-debug GC root tracing treats non-GC stack words as roots

  wasm-proposal:gcwasmtime:debugging
  bytecodealliance/wasmtime#14563 · Filter by author fitzgen opened on Oct 6, 2026
  1

• Hitting bail_bug! when synchronous component model tasks exit

  wasm-proposal:component-model-async
  bytecodealliance/wasmtime#14562 · Filter by author alexcrichton opened on Oct 6, 2026
  

• GC: Allow single-byte memory pages

  enhancementwasm-proposal:gc
  bytecodealliance/wasmtime#14523 · Filter by author simolus3 opened on Oct 4, 2026
  1

• SIGILL on aarch64 using f16 in comparisons on CPUs that don't have FP16 enabled

  cranelift:area:aarch64cranelift
  bytecodealliance/wasmtime#14510 · Filter by author alexcrichton opened on Oct 3, 2026

• Stack-switching ops loses fuel accounting

  wasm-proposal:stack-switchingwasmtime:fuel
  bytecodealliance/wasmtime#14509 · Filter by author alexcrichton opened on Oct 3, 2026

• Stack-switching + asan panic

  wasm-proposal:stack-switching
  bytecodealliance/wasmtime#14508 · Filter by author alexcrichton opened on Oct 3, 2026

• Component import analysis can drastically increase compile times

  cranelift:goal:compile-timewasm-proposal:component-model
  bytecodealliance/wasmtime#14506 · Filter by author alexcrichton opened on Oct 2, 2026