https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87189
--- Comment #1 from Paul Pluzhnikov <ppluzhnikov at google dot com> --- Crash stack for reference: Program received signal SIGSEGV, Segmentation fault. 0x0000000000000000 in ?? () (gdb) bt #0 0x0000000000000000 in ?? () #1 0x0000000000477f7c in __gthread_mutex_lock (__mutex=0x6a7380 <object_mutex>) at ./gthr-default.h:748 #2 __register_frame_info_bases (begin=<optimized out>, ob=0x6a2300 <object>, tbase=<optimized out>, dbase=<optimized out>) at ../../../libgcc/unwind-dw2-fde.c:103 #3 0x0000000000400acd in frame_dummy () #4 0x0000000000000001 in ?? () #5 0x000000000040194c in __libc_csu_init (argc=-9472, argc@entry=1, argv=argv@entry=0x7fffffffdc78, envp=0x7fffffffdc88) at elf-init.c:88 #6 0x0000000000401170 in __libc_start_main (main=0x400add <main>, argc=1, argv=0x7fffffffdc78, init=0x4018d0 <__libc_csu_init>, fini=0x401970 <__libc_csu_fini>, rtld_fini=0x0, stack_end=0x7fffffffdc68) at ../csu/libc-start.c:264 #7 0x00000000004009fa in _start () at ../sysdeps/x86_64/start.S:120
