https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93001
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I think the problem is in dfs_accessible_post:
757 tree scope = current_nonlambda_scope ();
will for this line:
enum class S::E : S::T { X };
give "::" so dfs_accessible_post returns NULL_TREE. But if it were a function,
its scope would be "S".
