1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/traits/new-solver/auto-with-drop_tracking_mir.rs b/tests/ui/traits/new-solver/auto-with-drop_tracking_mir.rs
new file mode 100644
index 000000000..a5db7c463
--- /dev/null
+++ b/tests/ui/traits/new-solver/auto-with-drop_tracking_mir.rs
@@ -0,0 +1,26 @@
+// compile-flags: -Ztrait-solver=next -Zdrop-tracking-mir
+// edition: 2021
+// revisions: pass fail
+//[pass] check-pass
+
+#![feature(negative_impls)]
+
+struct NotSync;
+impl !Sync for NotSync {}
+
+async fn foo() {
+    #[cfg(pass)]
+    let x = &();
+    #[cfg(fail)]
+    let x = &NotSync;
+    bar().await;
+    drop(x);
+}
+
+async fn bar() {}
+
+fn main() {
+    fn is_send(_: impl Send) {}
+    is_send(foo());
+    //[fail]~^ ERROR `impl Future<Output = ()>` cannot be sent between threads safely
+}