Issues

• Hitting bail_bug! + panic combining threading & yields

  bugwasm-proposal:component-model-asyncwasm-proposal:component-threading
  bytecodealliance/wasmtime#14618 · Filter by author alexcrichton opened on Oct 8, 2026
  

• Instantiation of modules with large element segments into imported tables regressed ~7x since #13487

  bytecodealliance/wasmtime#14616 · Filter by author veeshi opened on Oct 8, 2026

• Add GC heap developer tools for profiling and debugging

  enhancementwasm-proposal:gc
  bytecodealliance/wasmtime#14615 · Filter by author fitzgen opened on Oct 8, 2026

• wasmtime -g panics on wasm file from specific handcrafted wast

  bugwasmtime:debugging
  bytecodealliance/wasmtime#14609 · Filter by author mcclure opened on Oct 7, 2026
  3

• Pulley and s390x don't correctly handle the youngest frame in a stack-overflow trace

  bugcranelift:area:s390xpulley
  bytecodealliance/wasmtime#14597 · Filter by author alexcrichton opened on Oct 6, 2026

• Guest-debug doesn't guest fuel correctly

  bugwasmtime:debuggingwasmtime:fuel
  bytecodealliance/wasmtime#14594 · Filter by author alexcrichton opened on Oct 6, 2026

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

  bugwinch
  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

  bug
  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

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

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

  bugwasm-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

  bugwasmtime:pooling-allocator
  bytecodealliance/wasmtime#14581 · Filter by author alexcrichton opened on Oct 6, 2026
  1

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

  bugwasm-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!

  bugwasm-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

  bugwasm-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:riscv64enhancement
  bytecodealliance/wasmtime#14575 · Filter by author dotcom07 opened on Oct 6, 2026
  1

• 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

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

  bugwasm-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

  bugwasm-proposal:component-model-async
  bytecodealliance/wasmtime#14562 · Filter by author alexcrichton opened on Oct 6, 2026
  2