Don't concatenate binders across types

1 files changed, 14 insertions, 0 deletions

diff --git a/src/test/ui/lifetimes/issue-83737-binders-across-types.rs b/src/test/ui/lifetimes/issue-83737-binders-across-types.rs
new file mode 100644
index 00000000000..e130561e466
--- /dev/null
+++ b/src/test/ui/lifetimes/issue-83737-binders-across-types.rs
@@ -0,0 +1,14 @@
+// build-pass
+// compile-flags: --edition 2018
+// compile-flags: --crate-type rlib
+
+use std::future::Future;
+
+async fn handle<F>(slf: &F)
+where
+    F: Fn(&()) -> Box<dyn Future<Output = ()> + Unpin>,
+{
+    (slf)(&()).await;
+}
+
+fn main() {}