https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79254
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Fri Jan 27 16:17:04 2017 New Revision: 244986 URL: https://gcc.gnu.org/viewcvs?rev=244986&root=gcc&view=rev Log: PR libstdc++/79254 fix exception-safety in std::string::operator= PR libstdc++/79254 * config/abi/pre/gnu.ver: Add new symbols. * include/bits/basic_string.h [_GLIBCXX_USE_CXX11_ABI] (basic_string::_M_copy_assign): New overloaded functions to perform copy assignment. (basic_string::operator=(const basic_string&)): Dispatch to _M_copy_assign. * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI] (basic_string::_M_copy_assign(const basic_string&, true_type)): Define, performing rollback on exception. * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc: Test exception-safety guarantee. * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc: Likewise. * testsuite/util/testsuite_allocator.h (uneq_allocator::swap): Make std::swap visible. Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/config/abi/pre/gnu.ver trunk/libstdc++-v3/include/bits/basic_string.h trunk/libstdc++-v3/include/bits/basic_string.tcc trunk/libstdc++-v3/testsuite/21_strings/basic_string/allocator/char/copy_assign.cc trunk/libstdc++-v3/testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc trunk/libstdc++-v3/testsuite/util/testsuite_allocator.h
