1 files changed, 22 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-28625.rs b/src/test/ui/issues/issue-28625.rs
new file mode 100644
index 000000000..15a6a63d5
--- /dev/null
+++ b/src/test/ui/issues/issue-28625.rs
@@ -0,0 +1,22 @@
+// normalize-stderr-test "\d+ bits" -> "N bits"
+
+trait Bar {
+    type Bar;
+}
+
+struct ArrayPeano<T: Bar> {
+    data: T::Bar,
+}
+
+fn foo<T>(a: &ArrayPeano<T>) -> &[T] where T: Bar {
+    unsafe { std::mem::transmute(a) } //~ ERROR cannot transmute between types of different sizes
+}
+
+impl Bar for () {
+    type Bar = ();
+}
+
+fn main() {
+    let x: ArrayPeano<()> = ArrayPeano { data: () };
+    foo(&x);
+}