1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/issue-91231.rs b/src/test/ui/associated-types/issue-91231.rs
new file mode 100644
index 000000000..3c1cb81f0
--- /dev/null
+++ b/src/test/ui/associated-types/issue-91231.rs
@@ -0,0 +1,17 @@
+// check-pass
+
+#![feature(extern_types)]
+#![allow(dead_code)]
+
+extern {
+    type Extern;
+}
+
+trait Trait {
+    type Type;
+}
+
+#[inline]
+fn f<'a>(_: <&'a Extern as Trait>::Type) where &'a Extern: Trait {}
+
+fn main() {}