[Bug libstdc++/96766] std::swap(std::variant, std::variant) triggers undefined behavior sanitizer

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96766

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jonathan Wakely
<r...@gcc.gnu.org>:

https://gcc.gnu.org/g:4b6366f24890e25a07f9a045d15633c5b1fb80cb

commit r10-8675-g4b6366f24890e25a07f9a045d15633c5b1fb80cb
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Mon Aug 24 16:10:07 2020 +0100

    libstdc++: Make variant_npos conversions explicit [PR 96766]

    libstdc++-v3/ChangeLog:

            PR libstdc++/96766
            * include/std/variant (_Variant_storage): Replace implicit
            conversions from size_t to __index_type with explicit casts.

    (cherry picked from commit 074436cf8cdd2a9ce75cadd36deb8301f00e55b9)