1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/traits/unsend-future.rs b/tests/ui/traits/unsend-future.rs
new file mode 100644
index 000000000..fbbc07b11
--- /dev/null
+++ b/tests/ui/traits/unsend-future.rs
@@ -0,0 +1,21 @@
+// edition:2021
+
+// issue 108897
+trait Handler {}
+impl<F, Fut> Handler for F
+where
+    Fut: Send,
+    F: FnOnce() -> Fut,
+{}
+
+fn require_handler<H: Handler>(h: H) {}
+
+async fn handler() {
+    let a = &1 as *const i32;
+    async {}.await;
+}
+
+fn main() {
+    require_handler(handler)
+     //~^ ERROR future cannot be sent between threads safely
+}