1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/transmutability/references.rs b/tests/ui/transmutability/references.rs
new file mode 100644
index 00000000000..af3ff0ec1d2
--- /dev/null
+++ b/tests/ui/transmutability/references.rs
@@ -0,0 +1,27 @@
+//! Transmutations involving references are not yet supported.
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![allow(dead_code, incomplete_features, non_camel_case_types)]
+
+mod assert {
+    use std::mem::{Assume, BikeshedIntrinsicFrom};
+    pub struct Context;
+
+    pub fn is_maybe_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, {
+            Assume {
+                alignment: true,
+                lifetimes: true,
+                safety: true,
+                validity: true,
+            }
+        }>
+    {}
+}
+
+fn not_yet_implemented() {
+    #[repr(C)] struct Unit;
+    assert::is_maybe_transmutable::<&'static Unit, &'static Unit>(); //~ ERROR cannot be safely transmuted
+}