[Bug c++/106259] [10/11/12/13 Regression] ICE in diag_mismatched_tags, at cp/parser.cc:33896

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106259

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Looks like
struct A<int>::W<U>
isn't in the class2loc hash table so we crash here:

33894       tree spec = specialization_of (type);
33895       cdlguide = class2loc.get (spec);
33896       gcc_assert (cdlguide != NULL);