Issues

• Moving a ready subtask to another waitable set leaves a stale DeliverEvent: "BUG: delivering non-present event"

  wasm-proposal:component-model-async
  bytecodealliance/wasmtime#14878 · Filter by author FrancoisLDaigneault opened on Oct 20, 2026
  1

• Embedder API gaps for implements/external-id

  wasm-proposal:component-model-implements
  bytecodealliance/wasmtime#14862 · Filter by author jrandolf opened on Oct 19, 2026

• Resource handles can't move between labels that share a host resource type

  wasm-proposal:component-model-implements
  bytecodealliance/wasmtime#14861 · Filter by author jrandolf opened on Oct 19, 2026

• Limitations of the named_imports lookup API

  wasm-proposal:component-model-implements
  bytecodealliance/wasmtime#14860 · Filter by author jrandolf opened on Oct 19, 2026
  4

• The wasmtime CLI doesn't support labelled WASI imports or exports

  bytecodealliance/wasmtime#14859 · Filter by author jrandolf opened on Oct 19, 2026
  3

• Gaps in WASI named-import support

  wasm-proposal:component-model-implements
  bytecodealliance/wasmtime#14858 · Filter by author jrandolf opened on Oct 19, 2026

• Named WASI contexts must share one ResourceTable, but this isn't documented

  wasm-proposal:component-model-implements
  bytecodealliance/wasmtime#14857 · Filter by author jrandolf opened on Oct 19, 2026

• bindgen! named_imports edge cases

  wasm-proposal:component-model-implements
  bytecodealliance/wasmtime#14856 · Filter by author jrandolf opened on Oct 19, 2026

• bindgen! fails when a world imports an interface both directly and under a label

  wasm-proposal:component-model-implements
  bytecodealliance/wasmtime#14855 · Filter by author jrandolf opened on Oct 19, 2026

• implements loses its version suffix when canonical names are enabled

  wasm-proposal:component-canon-nameswasm-proposal:component-modelwasm-proposal:component-model-implements
  bytecodealliance/wasmtime#14854 · Filter by author jrandolf opened on Oct 19, 2026

• Panic in GC with guest-debug enabled

  wasm-proposal:gcwasmtime:debugging
  bytecodealliance/wasmtime#14845 · Filter by author alexcrichton opened on Oct 19, 2026
  1

• Tracking issue: remaining work before enabling map<K, V> by default

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14844 · Filter by author jrandolf opened on Oct 19, 2026

• Fuzzing doesn't cover maps holding resources, typed duplicate keys, or malformed lengths

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14833 · Filter by author jrandolf opened on Oct 19, 2026

• Typed map<K, V> support is limited to HashMap with the default hasher

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14832 · Filter by author jrandolf opened on Oct 19, 2026

• bindgen! takes anonymous map parameters by value with borrowed contents

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14831 · Filter by author jrandolf opened on Oct 19, 2026

• bindgen! output for map<K, V> doesn't compile without wasmtime's std feature

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14830 · Filter by author jrandolf opened on Oct 19, 2026

• Duplicate keys in map<K, V> leak handles

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14812 · Filter by author alexcrichton opened on Oct 19, 2026

• The wasmtime CLI does not support map<K, V>

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14811 · Filter by author alexcrichton opened on Oct 19, 2026

• wasi-preview1-component-adapter: unreachable in Descriptors::open when opening a file while nested files are open (freelist points to an open descriptor)

  bytecodealliance/wasmtime#14794 · Filter by author pmnmalo opened on Oct 17, 2026
  5

• RUSTSEC-2026-0369: ZipStreamReader::extract() and ZipArchive::extract() apply Unix permissions through symlinks without confining the target

  bytecodealliance/wasmtime#14790 · Filter by author github-actions opened on Oct 17, 2026
  1

• wasi-http p3: reused instance leaks handles until it traps when a content-length response body is dropped after content-length bytes

  bug
  bytecodealliance/wasmtime#14769 · Filter by author avkonst opened on Oct 15, 2026

• Cranelift: missed optimization Improve divisibility test by constant

  cranelift:goal:optimize-speedcranelift
  bytecodealliance/wasmtime#14699 · Filter by author Takashiidobe opened on Oct 13, 2026
  1

• Cranelift: miscompile on RV64, swizzle x, (splat y) doesn't properly zero extend

  bugcranelift:area:riscv64cranelift
  bytecodealliance/wasmtime#14691 · Filter by author Takashiidobe opened on Oct 13, 2026

• Error contexts sent through futures/streams aren't reference-counted

  bugwasm-proposal:component-model-error-context
  bytecodealliance/wasmtime#14674 · Filter by author alexcrichton opened on Oct 12, 2026
  1

• Error contexts have no limit on their debug message size

  bugwasm-proposal:component-model-error-context
  bytecodealliance/wasmtime#14669 · Filter by author alexcrichton opened on Oct 12, 2026