[Bug c++/118078] [12/13/14/15 Regression] GCC crashes on incorrect code with -std=c++20 since r10-4719

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118078

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Do we need
-                     && same_type_p (TYPE_MAIN_VARIANT (type),
-                                     current_class_type))
+                     && currently_open_class (TYPE_MAIN_VARIANT (type))
or something else?