http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59286
--- Comment #7 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> --- (In reply to Kostya Serebryany from comment #5) > Maybe let's do some remote debugging then :) For the current setup, the crash is always in StackDepotGet The following printfs: StackDesc *s = (StackDesc*)(v & ~1); printf("Getting %p\n",s); for (; s; s = s->link) { if (s->id == id) { *size = s->size; return s->stack; } printf("Following %p\n",s->link); } Always crash at an output like: Getting (nil) Getting 0x7ffff0305eb0 Following 0xc004832c00002 Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7ffff0461100 (LWP 24991)] 0x00007ffff35ae4e0 in __sanitizer::StackDepotGet (id=4030474480, size=0x0) at ../../../../gcc/libsanitizer/sanitizer_common/sanitizer_stackdepot.cc:196 196 if (s->id == id) { (gdb) print s $2 = (__sanitizer::StackDesc *) 0xc004832c00002 so the s->link field containing something unexpected.