1 files changed, 17 insertions, 0 deletions
diff --git a/tests/ui/nll/user-annotations/normalization.rs b/tests/ui/nll/user-annotations/normalization.rs
new file mode 100644
index 000000000..c2e892f57
--- /dev/null
+++ b/tests/ui/nll/user-annotations/normalization.rs
@@ -0,0 +1,17 @@
+// Test that we enforce a `&'static` requirement that is only visible
+// after normalization.
+
+trait Foo { type Out; }
+impl Foo for () { type Out = &'static u32; }
+impl<'a> Foo for &'a () { type Out = &'a u32; }
+
+fn main() {
+    let a = 22;
+    let _: <() as Foo>::Out = &a; //~ ERROR
+
+    let a = 22;
+    let _: <&'static () as Foo>::Out = &a; //~ ERROR
+
+    let a = 22;
+    let _: <&'_ () as Foo>::Out = &a;
+}