https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82229
--- Comment #8 from krzysio.kurek at wp dot pl --- Okay, I'm terribly sorry for the amount of messages but I'm failing over and over again trying to grasp the issue. The seed is only static for the first request, but changes later on becoming random once more. After making few (what seemed at the time) minor cosmetic changes GCC6 had optimized out at least one additional function completely.