http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54954
--- Comment #5 from swalter at lexmark dot com 2012-10-18 13:41:13 UTC --- Thanks for looking into this, Richard. I should have mentioned that you'll need to build with optimization turned on. Expected behavior: test.c built with -O -fno-builtin runs to successful completion Actual behavior: test.c built with -O -fno-builtin aborts (failed assertion) test.c built with -O0 does not abort