[Bug libstdc++/91807] [9/10/11 Regression] std::variant with multiple identical types assignment fail to compile

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91807

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Ville Voutilainen
<vi...@gcc.gnu.org>:

https://gcc.gnu.org/g:eb77f6f1b74aa200b70eb0a9e261c9f3b68294a0

commit r9-8716-geb77f6f1b74aa200b70eb0a9e261c9f3b68294a0
Author: Ville Voutilainen <ville.voutilai...@gmail.com>
Date:   Thu Jul 2 22:16:39 2020 +0300

    PR libstdc++/91807

            PR libstdc++/91807
            * include/std/variant
            (_Copy_assign_base::operator=(const _Copy_assign_base&):
            Do the move-assignment from a temporary so that the temporary
            is constructed with an explicit index.
            * testsuite/20_util/variant/91807.cc: New.

    (cherry picked from commit dbca7a69f276e4829354f87f2747ebff36f6090e)