Make LocalActor !Send && !Sync

src/lib.rs

@@ -1035,6 +1035,7 @@ impl<M: Into<N>, N> SenderTrait<M> for Arc<dyn SenderTrait<N>> {
 #[cfg(test)]
 mod tests {
     use std::{
+        rc::Rc,
         sync::atomic::{AtomicU32, Ordering},
         time::Duration,
     };
@@ -1100,7 +1101,9 @@ mod tests {
     #[test]
     fn send_constraints() {
         #[derive(Default)]
-        struct LocalActor;
+        struct LocalActor {
+            _ensure_not_send_not_sync: Rc<()>,
+        }
         impl Actor for LocalActor {
             type Context = Context<Self::Message>;
             type Error = ();
@@ -1123,10 +1126,10 @@ mod tests {
         let mut system = System::new("main");
 
         // Allowable, as the struct will be created on the new thread.
-        let _ = system.prepare_fn(|| LocalActor).with_default_capacity().spawn().unwrap();
+        let _ = system.prepare_fn(LocalActor::default).with_default_capacity().spawn().unwrap();
 
         // Allowable, as the struct will be run on the current thread.
-        system.prepare(LocalActor).with_default_capacity().run_and_block().unwrap();
+        system.prepare(LocalActor::default()).with_default_capacity().run_and_block().unwrap();
 
         system.shutdown().unwrap();
     }