1 files changed, 11 insertions, 0 deletions
diff --git a/tests/ui/box/unit/unique-decl.rs b/tests/ui/box/unit/unique-decl.rs
new file mode 100644
index 000000000..84a1b2a5b
--- /dev/null
+++ b/tests/ui/box/unit/unique-decl.rs
@@ -0,0 +1,11 @@
+// run-pass
+#![allow(dead_code)]
+
+
+pub fn main() {
+    let _: Box<isize>;
+}
+
+fn f(_i: Box<isize>) -> Box<isize> {
+    panic!();
+}