1 files changed, 26 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-5718.rs b/src/test/ui/issues/issue-5718.rs
new file mode 100644
index 000000000..63efec953
--- /dev/null
+++ b/src/test/ui/issues/issue-5718.rs
@@ -0,0 +1,26 @@
+// run-pass
+// pretty-expanded FIXME #23616
+
+#![feature(box_syntax)]
+
+struct Element;
+
+macro_rules! foo {
+    ($tag: expr, $string: expr) => {
+        if $tag == $string {
+            let element: Box<_> = box Element;
+            unsafe {
+                return std::mem::transmute::<_, usize>(element);
+            }
+        }
+    }
+}
+
+fn bar() -> usize {
+    foo!("a", "b");
+    0
+}
+
+fn main() {
+    bar();
+}