1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-by-ref.rs b/src/test/ui/unboxed-closures/unboxed-closures-by-ref.rs
new file mode 100644
index 000000000..cf4d4d3e1
--- /dev/null
+++ b/src/test/ui/unboxed-closures/unboxed-closures-by-ref.rs
@@ -0,0 +1,24 @@
+// run-pass
+// Test by-ref capture of environment in unboxed closure types
+
+fn call_fn<F: Fn()>(f: F) {
+    f()
+}
+
+fn call_fn_mut<F: FnMut()>(mut f: F) {
+    f()
+}
+
+fn call_fn_once<F: FnOnce()>(f: F) {
+    f()
+}
+
+fn main() {
+    let mut x = 0_usize;
+    let y = 2_usize;
+
+    call_fn(|| assert_eq!(x, 0));
+    call_fn_mut(|| x += y);
+    call_fn_once(|| x += y);
+    assert_eq!(x, y * 2);
+}