wasm-bindgen Files

Added

• Added unchecked_optional_param_type attribute for marking exported function parameters as optional in TypeScript (?:) and JSDoc ([paramName]) output. Mutually exclusive with unchecked_param_type. Required parameters after optional parameters are rejected at compile time. #5002

• Added termination detection for panic=unwind builds. When a non-JS exception (e.g. a Rust panic) escapes from Wasm, the instance is marked as terminated and subsequent calls from JS into Wasm will throw a Module terminated error instead of re-entering corrupted state. #5005

• When --reset-state is combined with panic=unwind builds, the Wasm instance is automatically reset after a fatal termination, allowing subsequent calls to succeed instead of throwing a Module terminated error. #5013

Changed

• Replaced runtime 0x80000000 vtable bit-flag for closure unwind safety with a compile-time const UNWIND_SAFE: bool generic on the invoke shim, OwnedClosure, and BorrowedClosure. Removes OwnedClosureUnwind and deduplicates internal closure helpers. The public API is unchanged. #5003

• Removed unused IntoWasmClosureRef*::WithLifetime types, WasmClosure::to_wasm_slice, and a lifetime from IntoWasmClosureRef*; moved Static associated type into WasmClosure. #5003

Fixed

• Fixed exported structs/enums/functions with the same js_name but different js_namespace values producing symbol collisions at compile time, by deriving internal wasm symbols from a qualified name that includes the namespace. #4977

• Fixed soundness hole in ScopedClosure's UpcastFrom that allowed to extend the lifetime after the original ScopedClosure was dropped. #5006