1 files changed, 13 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-21174-2.rs b/src/test/ui/issues/issue-21174-2.rs
new file mode 100644
index 000000000..c90f91f6a
--- /dev/null
+++ b/src/test/ui/issues/issue-21174-2.rs
@@ -0,0 +1,13 @@
+// check-pass
+#![allow(dead_code)]
+#![allow(unused_variables)]
+trait Trait<'a> {
+    type A;
+    type B;
+}
+
+fn foo<'a, T: Trait<'a>>(value: T::A) {
+    let new: T::B = unsafe { std::mem::transmute_copy(&value) };
+}
+
+fn main() { }