[Bug c++/105761] [11/12/13 Regression] ICE on hidden friend definition defined in base type since r11-388-gc4bff4c230c8d341

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105761

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Jason Merrill
<ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:2843bfa21073dd1ac222540e189e8bcf40afc2c0

commit r12-8456-g2843bfa21073dd1ac222540e189e8bcf40afc2c0
Author: Jason Merrill <ja...@redhat.com>
Date:   Fri Jun 3 12:35:12 2022 -0400

    c++: redeclared hidden friend [PR105761]

    Here, when we see the second declaration of f we match it with the first
    one, copy over DECL_TEMPLATE_INFO, and then try to use it when parsing the
    definition, leading to confusion.

            PR c++/105761

    gcc/cp/ChangeLog:

            * decl.cc (duplicate_decls): Don't copy DECL_TEMPLATE_INFO
            from a hidden friend.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp1y/auto-fn64.C: New test.