Stream: git-wasmtime

Topic: wasmtime / issue #11251 panic using future.{read,write} w...

Wasmtime GitHub notifications bot (Jul 15 2025 at 23:07):

Issue #11251 panic using future.{read,write} with no type and no memory was transferred from bytecodealliance/wasip3-prototyping#235.

Wasmtime GitHub notifications bot (Jul 15 2025 at 23:09):

dicej commented on issue #11251:

Thanks for reporting this @lukewagner. I've moved the issue to the Wasmtime repo since CM async support has been upstreamed (and thus this should be reproduceable on the latest canary build).

Wasmtime GitHub notifications bot (Jul 15 2025 at 23:09):

dicej assigned dicej to issue #11251.

Wasmtime GitHub notifications bot (Jul 15 2025 at 23:10):

dicej added the wasm-proposal:component-model-async label to Issue #11251.

Wasmtime GitHub notifications bot (Jul 15 2025 at 23:11):

dicej edited a comment on issue #11251:

Thanks for reporting this @lukewagner. I've moved the issue to the Wasmtime repo since CM async support has been upstreamed (and thus this should be reproduceable on the latest canary build Er, maybe we don't have canary builds in this repo; the last dev build appears to be from 2022).

Wasmtime GitHub notifications bot (Jul 16 2025 at 00:47):

alexcrichton removed the bug label from Issue #11251.

Wasmtime GitHub notifications bot (Jul 17 2025 at 19:45):

alexcrichton closed issue #11251:

To reproduce, start with this test:
https://github.com/WebAssembly/component-model/blob/main/test/async/empty-wait.wast
and then delete the (memory $memory "mem") on either the canon future.read or canon future.write.

Backtrace:

$ RUST_BACKTRACE=full wasmtime-p3 wast -W component-model-async=yes empty-wait.wast

thread '<unnamed>' panicked at crates/cranelift/src/compiler/component.rs:1317:70:
called `Option::unwrap()` on a `None` value
stack backtrace:
  12:        0x107bbba08 - core::option::unwrap_failed::hdbf5b02c13e4fbf7
  13:        0x106e26729 - wasmtime_internal_cranelift::compiler::component::TrampolineCompiler::translate_future_or_stream_call::h5f2f561f1bc4b0c3
  14:        0x106e80d9c - wasmtime_internal_cranelift::compiler::component::<impl wasmtime_environ::component::compiler::ComponentCompiler for wasmtime_internal_cranelift::compiler::Compiler>::compile_trampoline::{{closure}}::h92a0b1bc7be14058

Last updated: Dec 06 2025 at 06:05 UTC