https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92843
--- Comment #6 from jules at gcc dot gnu.org --- Please don't start making changes to the reference-counting code that is being replaced by my overhaul patch. The existing code was rewritten for a reason -- that being, I hit various problems with it (albeit long since forgotten) that interfered with the manual deep-copy implementation. We have refcount self-checking code for the overhauled code. We can address corner-case bug fixes as follow-ons once the main overhaul patch is committed.