https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86874
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Tue Aug 7 21:38:50 2018 New Revision: 263368 URL: https://gcc.gnu.org/viewcvs?rev=263368&root=gcc&view=rev Log: PR libstdc++/86874 fix std::variant::swap regression Backport from mainline 2018-08-07 Jonathan Wakely <jwak...@redhat.com> PR libstdc++/86874 * include/std/variant (_Copy_ctor_base::_M_destructive_move): Define here instead of in _Move_assign_base. (_Copy_ctor_base<true, _Types...>::_M_destructive_move): Define. (_Copy_assign_base::operator=): Use _M_destructive_move when changing the contained value to another alternative. (_Move_assign_base::operator=): Likewise. (_Move_assign_base::_M_destructive_move): Remove. * testsuite/20_util/variant/86874.cc: New test. Added: branches/gcc-8-branch/libstdc++-v3/testsuite/20_util/variant/86874.cc Modified: branches/gcc-8-branch/libstdc++-v3/ChangeLog branches/gcc-8-branch/libstdc++-v3/include/std/variant
