1 files changed, 19 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-4735.rs b/tests/ui/issues/issue-4735.rs
new file mode 100644
index 00000000000..3ea4b01cd2b
--- /dev/null
+++ b/tests/ui/issues/issue-4735.rs
@@ -0,0 +1,19 @@
+// run-pass
+// pretty-expanded FIXME #23616
+
+use std::mem::transmute;
+
+struct NonCopyable(*const u8);
+
+impl Drop for NonCopyable {
+    fn drop(&mut self) {
+        let NonCopyable(p) = *self;
+        let _v = unsafe { transmute::<*const u8, Box<isize>>(p) };
+    }
+}
+
+pub fn main() {
+    let t = Box::new(0);
+    let p = unsafe { transmute::<Box<isize>, *const u8>(t) };
+    let _z = NonCopyable(p);
+}