1 files changed, 12 insertions, 0 deletions
diff --git a/src/test/ui/unboxed-closures/unboxed-closure-sugar-used-on-struct.rs b/src/test/ui/unboxed-closures/unboxed-closure-sugar-used-on-struct.rs
new file mode 100644
index 000000000..bd61cbd80
--- /dev/null
+++ b/src/test/ui/unboxed-closures/unboxed-closure-sugar-used-on-struct.rs
@@ -0,0 +1,12 @@
+// Test that parentheses form doesn't work with struct types appearing in argument types.
+
+struct Bar<A> {
+    f: A
+}
+
+fn foo(b: Box<Bar()>) {
+    //~^ ERROR parenthesized type parameters may only be used with a `Fn` trait
+    //~| ERROR this struct takes 1 generic argument but 0 generic arguments
+}
+
+fn main() { }