wasmtime / issue #14844 Tracking issue: remaining work be... · git-wasmtime

Stream: git-wasmtime

Topic: wasmtime / issue #14844 Tracking issue: remaining work be...

Wasmtime GitHub notifications bot (Oct 19 2026 at 19:18):

This tracks what's left before the component model map<K, V> type can be enabled by default, following the discussion on #14801.

Runtime

[ ] #14810: map lifting allocates before validating the length (#14835)

[ ] #14812: duplicate keys leak handles

[ ] #14832: typed support is limited to HashMap with the default hasher

bindgen!

[ ] #14813: no codegen tests (#14834)

[ ] #14830: generated code doesn't compile without std (#14837)

[ ] #14831: anonymous map parameters are taken by value (#14838)

[ ] map contents are logged in non-verbose tracing (#14836)

CLI / WAVE

[ ] #14811: --invoke doesn't support maps (stopgap #14843; full support needs bytecodealliance/wasm-tools#2777, see also bytecodealliance/wasm-tools#2778)

Testing

[ ] #14833: fuzzing gaps

[ ] validation tests for map key types (#14841)

[ ] C API value tests (#14840)

Docs

[ ] Val::Map docs and Type::unwrap_map (#14839)

[ ] update docs/stability-wasm-proposals.md once the above are resolved

Wasmtime GitHub notifications bot (Oct 19 2026 at 19:22):

alexcrichton added the wasm-proposal:component-model-map label to Issue #14844.

Wasmtime GitHub notifications bot (Oct 23 2026 at 20:55):

jrandolf edited issue #14844:

This tracks what's left before the component model map<K, V> type can be enabled by default, following the discussion on #14801.

Runtime

[x] #14810: map lifting allocates before validating the length (#14835)

[ ] #14812: duplicate keys leak handles. Handles are to be forbidden in map values instead (WebAssembly/component-model#751), which needs a wasm-tools release with that validation.

[x] #14832: typed support is limited to HashMap with the default hasher (#14870, #14927)

bindgen!

[x] #14813: no codegen tests (#14834)

[x] #14830: generated code doesn't compile without std (#14927)

[x] #14831: anonymous map parameters are taken by value (#14838)

[x] map contents are logged in non-verbose tracing (#14836)

CLI / WAVE

[ ] #14811: --invoke doesn't support maps (#14843, needs a wasm-tools release with bytecodealliance/wasm-tools#2782)

Testing

[x] #14833: fuzzing gaps (existing fuzzing is enough)

[x] validation tests for map key types (#14841)

[x] C API value tests (#14840)

[ ] map values in *.wast tests, for duplicate keys (#14843)

Docs

[x] Val::Map docs and Type::unwrap_map (#14839)

[ ] update docs/stability-wasm-proposals.md (#14801)

Last updated: Oct 31 2026 at 23:03 UTC