RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

zeroidc/vendor/tokio/tests/sync_errors.rs

@@ -0,0 +1,30 @@
+#![warn(rust_2018_idioms)]
+#![cfg(feature = "sync")]
+
+#[cfg(target_arch = "wasm32")]
+use wasm_bindgen_test::wasm_bindgen_test as test;
+
+fn is_error<T: std::error::Error + Send + Sync>() {}
+
+#[test]
+fn mpsc_error_bound() {
+    use tokio::sync::mpsc::error;
+
+    is_error::<error::SendError<()>>();
+    is_error::<error::TrySendError<()>>();
+}
+
+#[test]
+fn oneshot_error_bound() {
+    use tokio::sync::oneshot::error;
+
+    is_error::<error::RecvError>();
+    is_error::<error::TryRecvError>();
+}
+
+#[test]
+fn watch_error_bound() {
+    use tokio::sync::watch::error;
+
+    is_error::<error::SendError<()>>();
+}