1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/extern/issue-13655.rs b/tests/ui/extern/issue-13655.rs
new file mode 100644
index 000000000..6dd184799
--- /dev/null
+++ b/tests/ui/extern/issue-13655.rs
@@ -0,0 +1,32 @@
+// run-pass
+#![feature(fn_traits, unboxed_closures)]
+use std::ops::Fn;
+
+struct Foo<T>(T);
+
+impl<T: Copy> Fn<()> for Foo<T> {
+    extern "rust-call" fn call(&self, _: ()) -> T {
+      match *self {
+        Foo(t) => t
+      }
+    }
+}
+
+impl<T: Copy> FnMut<()> for Foo<T> {
+    extern "rust-call" fn call_mut(&mut self, _: ()) -> T {
+        self.call(())
+    }
+}
+
+impl<T: Copy> FnOnce<()> for Foo<T> {
+    type Output = T;
+
+    extern "rust-call" fn call_once(self, _: ()) -> T {
+        self.call(())
+    }
+}
+
+fn main() {
+  let t: u8 = 1;
+  println!("{}", Foo(t)());
+}