https://bugs.winehq.org/show_bug.cgi?id=48161
--- Comment #25 from Paul Gofman gofmanp@gmail.com --- FWIW I could reproduce the same crash when adding -fstack-protector or -fstack-protector-strong to the end of my local build flags for ntdll.dll.so. Looks like that specific check style as in the snippet in the previous comment appears with -fstack-protector-strong flag only, so probably this is the flag which somehow slips into Ubuntu build.