1 files changed, 11 insertions, 0 deletions
diff --git a/src/test/ui/unboxed-closures/unboxed-closure-sugar-not-used-on-fn.rs b/src/test/ui/unboxed-closures/unboxed-closure-sugar-not-used-on-fn.rs
new file mode 100644
index 000000000..6d6ed4b56
--- /dev/null
+++ b/src/test/ui/unboxed-closures/unboxed-closure-sugar-not-used-on-fn.rs
@@ -0,0 +1,11 @@
+// Test that the `Fn` traits require `()` form without a feature gate.
+
+fn bar1(x: &dyn Fn<(), Output=()>) {
+    //~^ ERROR of `Fn`-family traits' type parameters is subject to change
+}
+
+fn bar2<T>(x: &T) where T: Fn<()> {
+    //~^ ERROR of `Fn`-family traits' type parameters is subject to change
+}
+
+fn main() { }