https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64368
--- Comment #5 from howarth at bromo dot med.uc.edu --- (In reply to Francois-Xavier Coudert from comment #3) > Appeared between 218883 (works) and 218985 (fails) [I'm glad my nightly > tester is useful!] > > Culprits are: > > r218984 | redi | 2014-12-20 01:19:40 +0100 (Sat, 20 Dec 2014) | 4 lines > > Fix duplicate symbol errors in Darwin bootstrap. > > * src/c++98/locale-inst.cc (__add_grouping, __pad, __int_to_char): > Only compile for old ABI. > > r218964 | redi | 2014-12-19 19:16:39 +0100 (Fri, 19 Dec 2014) | 183 lines > > New std::string implementation. The r218964 commit can't be at fault as I have posted testing at r218877... https://gcc.gnu.org/ml/gcc-testresults/2014-12/msg02450.html and the libstdc++ results are pristine. The commit at r218984 seems bizarre as it has no associated PR for the supposed bug.