1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/ui/generics/generic-tag.rs b/src/test/ui/generics/generic-tag.rs
new file mode 100644
index 000000000..31fc2178d
--- /dev/null
+++ b/src/test/ui/generics/generic-tag.rs
@@ -0,0 +1,14 @@
+// run-pass
+#![allow(unused_assignments)]
+#![allow(non_camel_case_types)]
+
+// pretty-expanded FIXME #23616
+
+#![allow(unused_variables)]
+
+enum option<T> { some(#[allow(unused_tuple_struct_fields)] Box<T>), none, }
+
+pub fn main() {
+    let mut a: option<isize> = option::some::<isize>(Box::new(10));
+    a = option::none::<isize>;
+}