1 files changed, 9 insertions, 0 deletions
diff --git a/tests/ui/async-await/issue-70818.rs b/tests/ui/async-await/issue-70818.rs
new file mode 100644
index 000000000..019c56eb2
--- /dev/null
+++ b/tests/ui/async-await/issue-70818.rs
@@ -0,0 +1,9 @@
+// edition:2018
+
+use std::future::Future;
+fn foo<T: Send, U>(ty: T, ty1: U) -> impl Future<Output = (T, U)> + Send {
+    //~^ Error future cannot be sent between threads safely
+    async { (ty, ty1) }
+}
+
+fn main() {}