crates/wasm-actor/src/actor.rs

@@ -50,6 +50,7 @@ impl ActorInterface for WasmActor {
 
         // 3. Call guest handle
         if self.handle.call(&mut self.store, (ptr, len)).is_err() {
+            self.store.data_mut().outbox.clear(); // discard sends from incomplete operation
             return; // handle trapped — drop message, keep actor alive
         }
 

crates/wasm-actor/tests/wasm_actor.rs

@@ -743,7 +743,6 @@ fn native_actor_communicates_with_wasm_actor() {
 // ── Stale outbox: sends before trap leak into next handle ─────────────────────
 
 #[test]
-#[ignore] // BUG: outbox not cleared on handle trap — stale entries leak into next call
 fn outbox_entries_from_trapped_handle_do_not_leak_into_next_call() {
     // A guest that calls swactor.send() successfully, then traps.
     // The outbox contains the send from before the trap.