http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55561 --- Comment #4 from Kostya Serebryany <kcc at gcc dot gnu.org> 2012-12-02 10:28:10 UTC --- Note that tsan currently requires to use -pie linker flag (and either -fPIC or -fPIE compiler flag). Obviously, your failure happens before the run-time library has a chance to crash.