1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/typeck/unify-return-ty.rs b/src/test/ui/typeck/unify-return-ty.rs
new file mode 100644
index 000000000..da1d82e89
--- /dev/null
+++ b/src/test/ui/typeck/unify-return-ty.rs
@@ -0,0 +1,16 @@
+// run-pass
+// Tests that the tail expr in null() has its type
+// unified with the type *T, and so the type variable
+// in that type gets resolved.
+
+// pretty-expanded FIXME #23616
+
+use std::mem;
+
+fn null<T>() -> *const T {
+    unsafe {
+        mem::transmute(0_usize)
+    }
+}
+
+pub fn main() { null::<isize>(); }