https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82737
--- Comment #9 from Matti Bryce <brycm001 at gmail dot com> --- (In reply to Martin Liška from comment #2) > Hi. I can't build your pre-process source file. Please follow steps to > reduce the segfault: > https://gcc.gnu.org/wiki/A_guide_to_testcase_reduction > > And please try to run it in gdb (adding -wrapper gdb,--args), and print > back-trace. Thanks. I added a backtrace (though my GCC doesn't have debug symbols). It seems the stack is corrupt at some point.