[Bug libstdc++/95904] Improve the diagnostic for conflicting return types in std::visit

[ville.voutilainen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95904

Ville Voutilainen <ville.voutilainen at gmail dot com> changed:

           What    |Removed                     |Added
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           Assignee|unassigned at gcc dot gnu.org      |ville.voutilainen at gmail dot com
             Status|NEW                         |ASSIGNED
                 CC|                            |ville.voutilainen at gmail dot com