http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55521
--- Comment #4 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-11-28 22:28:55 UTC --- Debugging a similar build of cond1.exe on darwin12 without -fsanitize=address show exactly the same trace except... Single stepping until exit from function dyld_stub_pthread_once, which has no line number information. Program exited normally. Will need to retest x86_64 Fedora 15 with a emutls build of gcc trunk to make sure this isn't a problem with emutls vs -fsanitize=address.