1 files changed, 7 insertions, 0 deletions
diff --git a/tests/ui/box/unit/unique-mutable.rs b/tests/ui/box/unit/unique-mutable.rs
new file mode 100644
index 000000000..0367c0809
--- /dev/null
+++ b/tests/ui/box/unit/unique-mutable.rs
@@ -0,0 +1,7 @@
+// run-pass
+
+pub fn main() {
+    let mut i: Box<_> = Box::new(0);
+    *i = 1;
+    assert_eq!(*i, 1);
+}