http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60914
--- Comment #2 from ctice at gcc dot gnu.org --- Running your tests, I get a different ICE: gcc-fsf-root/usr/local/bin/gcc -O -flto -fvtable-verify=preinit pr59437.C pr59437.C: In function ‘_GLOBAL__sub_I.00099_cout’: pr59437.C:24:1: internal compiler error: Segmentation fault } ^ 0xd6bfc1 crash_signal ../../gcc-fsf.clean/gcc/toplev.c:337 0x8a8ea5 bitmap_obstack_free(bitmap_head*) ../../gcc-fsf.clean/gcc/bitmap.c:408 0xdb3a83 cleanup_tree_cfg_1 ../../gcc-fsf.clean/gcc/tree-cfgcleanup.c:698 0xdb3ae8 cleanup_tree_cfg_noloop ../../gcc-fsf.clean/gcc/tree-cfgcleanup.c:731 0xdb3bf5 cleanup_tree_cfg() ../../gcc-fsf.clean/gcc/tree-cfgcleanup.c:786 0xc7a8dc execute_function_todo ../../gcc-fsf.clean/gcc/passes.c:1741 0xc79cd8 do_per_function ../../gcc-fsf.clean/gcc/passes.c:1504 0xc7ab37 execute_todo ../../gcc-fsf.clean/gcc/passes.c:1817 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. I will investigate this, but I am concerned that I cannot seem to reproduce your problem?