1 files changed, 15 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-22603.rs b/tests/ui/issues/issue-22603.rs
new file mode 100644
index 000000000..a83e291f9
--- /dev/null
+++ b/tests/ui/issues/issue-22603.rs
@@ -0,0 +1,15 @@
+// check-pass
+
+#![feature(unboxed_closures, fn_traits)]
+
+struct Foo;
+
+impl<A> FnOnce<(A,)> for Foo {
+    type Output = ();
+    extern "rust-call" fn call_once(self, (_,): (A,)) {
+    }
+}
+
+fn main() {
+    println!("{:?}", Foo("bar"));
+}