Wasmtime GitHub notifications bot (May 24 2026 at 15:44): Wasmtime GitHub notifications bot (May 24 2026 at 15:44):alexcrichton opened issue #13474:
This input:
#[test] fn fuzz_bug() -> Result<()> { let mut config = Config::new(); config.strategy(Strategy::Winch); let engine = Engine::new(&config)?; let mut store = Store::new(&engine, ()); let fty = FuncType::new(&engine, [], []); let tty1 = TagType::new(fty.clone()); Tag::new(&mut store, &tty1.clone())?; Ok(()) }fails with:
thread 'tags::fuzz_bug' (3789926) panicked at /rustc/59807616e1fa2540724bfbac14d7976d7e4a3860/library/core/src/panicking.rs:233:5: ▐ panic in a destructor during cleanup ▐ thread caused non-unwinding panic. aborting. ▐ thread 'tags::fuzz_bug' (3789926) panicked at crates/wasmtime/src/runtime/type_registry.rs:1132:13: ▐ assertion failed: entry.0.shared_type_indices.iter().all(|ty| ▐ { ▐ let id = shared_type_index_to_slab_id(*ty); ▐ let sub_ty = self.types[id].as_ref().unwrap(); ▐ assert!(!sub_ty.composite_type.shared); ▐ matches!(&sub_ty.composite_type.inner, ▐ wasmtime_environ::WasmCompositeInnerType::Func(_)) ▐ }) ▐ note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace ▐ ▐ thread 'tags::fuzz_bug' (3789926) panicked at crates/wasmtime/src/sync_std.rs:51:23: ▐ called `Result::unwrap()` on an `Err` value: PoisonError { .. } ▐ stack backtrace: ▐ ...cc @fitzgen
Wasmtime GitHub notifications bot (May 24 2026 at 15:44):alexcrichton added the fuzz-bug label to Issue #13474.
Wasmtime GitHub notifications bot (May 24 2026 at 15:44):alexcrichton added the wasm-proposal:gc label to Issue #13474.
Wasmtime GitHub notifications bot (May 27 2026 at 14:49):fitzgen closed issue #13474:
This input:
#[test] fn fuzz_bug() -> Result<()> { let mut config = Config::new(); config.strategy(Strategy::Winch); let engine = Engine::new(&config)?; let mut store = Store::new(&engine, ()); let fty = FuncType::new(&engine, [], []); let tty1 = TagType::new(fty.clone()); Tag::new(&mut store, &tty1.clone())?; Ok(()) }fails with:
thread 'tags::fuzz_bug' (3789926) panicked at /rustc/59807616e1fa2540724bfbac14d7976d7e4a3860/library/core/src/panicking.rs:233:5: ▐ panic in a destructor during cleanup ▐ thread caused non-unwinding panic. aborting. ▐ thread 'tags::fuzz_bug' (3789926) panicked at crates/wasmtime/src/runtime/type_registry.rs:1132:13: ▐ assertion failed: entry.0.shared_type_indices.iter().all(|ty| ▐ { ▐ let id = shared_type_index_to_slab_id(*ty); ▐ let sub_ty = self.types[id].as_ref().unwrap(); ▐ assert!(!sub_ty.composite_type.shared); ▐ matches!(&sub_ty.composite_type.inner, ▐ wasmtime_environ::WasmCompositeInnerType::Func(_)) ▐ }) ▐ note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace ▐ ▐ thread 'tags::fuzz_bug' (3789926) panicked at crates/wasmtime/src/sync_std.rs:51:23: ▐ called `Result::unwrap()` on an `Err` value: PoisonError { .. } ▐ stack backtrace: ▐ ...cc @fitzgen
Last updated: Jun 01 2026 at 09:49 UTC