1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/async-await/issue-64130-1-sync.rs b/src/test/ui/async-await/issue-64130-1-sync.rs
new file mode 100644
index 000000000..af83f14bb
--- /dev/null
+++ b/src/test/ui/async-await/issue-64130-1-sync.rs
@@ -0,0 +1,23 @@
+#![feature(negative_impls)]
+// edition:2018
+
+// This tests the the specialized async-await-specific error when futures don't implement an
+// auto trait (which is specifically Sync) due to some type that was captured.
+
+struct Foo;
+
+impl !Sync for Foo {}
+
+fn is_sync<T: Sync>(t: T) { }
+
+async fn bar() {
+    let x = Foo;
+    baz().await;
+}
+
+async fn baz() { }
+
+fn main() {
+    is_sync(bar());
+    //~^ ERROR future cannot be shared between threads safely
+}