Remove blocking_send that crashes

src/recv.rs

@@ -35,7 +35,9 @@ impl Sender {
 impl Drop for Sender {
 	fn drop(&mut self) {
 		if let Some(inner) = self.inner.take() {
-			let _ = inner.blocking_send(Err(255));
+			tokio::spawn(async move {
+				let _ = inner.send(Err(255)).await;
+			});
 		}
 	}
 }