https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63175
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> --- (In reply to Maciej W. Rozycki from comment #5) It doesn't look like things have changed since 4.9.0. I just posted my analysis to the list: https://gcc.gnu.org/ml/gcc-patches/2015-02/msg01401.html