1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/binding/match-implicit-copy-unique.rs b/tests/ui/binding/match-implicit-copy-unique.rs
new file mode 100644
index 000000000..74ffe2ecd
--- /dev/null
+++ b/tests/ui/binding/match-implicit-copy-unique.rs
@@ -0,0 +1,16 @@
+// run-pass
+#![allow(non_shorthand_field_patterns)]
+
+struct Pair { a: Box<isize>, b: Box<isize> }
+
+pub fn main() {
+    let mut x: Box<_> = Box::new(Pair { a: Box::new(10), b: Box::new(20) });
+    let x_internal = &mut *x;
+    match *x_internal {
+      Pair {a: ref mut a, b: ref mut _b} => {
+        assert_eq!(**a, 10);
+        *a = Box::new(30);
+        assert_eq!(**a, 30);
+      }
+    }
+}