1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-boxed.rs b/src/test/ui/unboxed-closures/unboxed-closures-boxed.rs
new file mode 100644
index 000000000..3f550fd04
--- /dev/null
+++ b/src/test/ui/unboxed-closures/unboxed-closures-boxed.rs
@@ -0,0 +1,15 @@
+// run-pass
+
+use std::ops::FnMut;
+
+ fn make_adder(x: i32) -> Box<dyn FnMut(i32)->i32+'static> {
+    Box::new(move |y: i32| -> i32 { x + y }) as
+        Box<dyn FnMut(i32)->i32+'static>
+}
+
+pub fn main() {
+    let mut adder = make_adder(3);
+    let z = adder(2);
+    println!("{}", z);
+    assert_eq!(z, 5);
+}