https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65979
--- Comment #24 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- (In reply to Kazumoto Kojima from comment #23) > Ouch. The peephole in problem was added at gcc-5 not at 4.9. The above > patch should fix the original conftest.c issue, but debien 4.9-16 problem > would be an another issue. Sorry for my confusion. I am partially to be blamed for that. I initially reported the gcc-5 issue here, then saw gcc-4.9 failed to build as well and then assumed both were the same problem. But in any case, I am super happy you guys are fixing this. I will be back in Japan in October, so if I have a chance to meet either of you, I owe you some beer/sake/wine etc :). Thanks!