fix: clear cached Send flag on mutation

crates/evm2/src/evm/async.rs

@@ -778,6 +778,24 @@ mod tests {
         drop(evm.transact_async_send(&tx));
     }
 
+    #[test]
+    #[should_panic = "async EVM execution requires EVM erased fields to be verified as Send with Evm::evm_is_send"]
+    fn transaction_async_send_panics_after_state_mut_replaces_database() {
+        let marker = Rc::new(());
+        let mut evm = Evm::<BaseEvmTypes>::new(
+            SpecId::OSAKA,
+            BlockEnvExt::default(),
+            TxRegistry::new(),
+            InMemoryDB::default(),
+            Precompiles::base(SpecId::OSAKA),
+        );
+        evm.evm_is_send::<InMemoryDB, Precompiles<BaseEvmTypes>>();
+        evm.state_mut().set_initial(Db::new(NonSendDb { marker }));
+        let tx = test_tx(41);
+
+        drop(evm.transact_async_send(&tx));
+    }
+
     #[test]
     fn transaction_async_accepts_non_send_erased_fields() {
         let marker = Rc::new(());
@@ -902,6 +920,24 @@ mod tests {
         assert_eq!(result.tx_gas_used(), 0);
     }
 
+    #[test]
+    #[should_panic = "async EVM execution requires EVM erased fields to be verified as Send with Evm::evm_is_send"]
+    fn system_call_async_send_panics_after_overlay_db_mut_replaces_database() {
+        let marker = Rc::new(());
+        let contract = Address::from([0x42; 20]);
+        let mut evm = Evm::<BaseEvmTypes>::new(
+            SpecId::OSAKA,
+            BlockEnvExt::default(),
+            TxRegistry::new(),
+            InMemoryDB::default(),
+            Precompiles::base(SpecId::OSAKA),
+        );
+        evm.evm_is_send::<InMemoryDB, Precompiles<BaseEvmTypes>>();
+        evm.overlay_db_mut().db = Box::new(Db::new(NonSendDb { marker }));
+
+        drop(evm.system_call_async_send(SystemTx::new(contract, Bytes::new())));
+    }
+
     #[test]
     fn system_call_async_clears_stale_error_code() {
         let contract = Address::from([0x42; 20]);

crates/evm2/src/evm/mod.rs

@@ -584,6 +584,7 @@ impl<'a, T: EvmTypes> Evm<'a, T> {
     /// available through [`Self::database_mut`].
     #[inline]
     pub fn overlay_db_mut(&mut self) -> &mut CacheDB<Box<dyn DynDatabase + 'a>> {
+        self.evm_send = false;
         self.state.overlay_db_mut()
     }
 
@@ -747,6 +748,7 @@ impl<'a, T: EvmTypes> Evm<'a, T> {
     /// Returns the mutable EVM state.
     #[inline]
     pub const fn state_mut(&mut self) -> &mut State<'a> {
+        self.evm_send = false;
         &mut self.state
     }