https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68898
--- Comment #2 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Forgot to add stack trace:
Error: dominator of 6 status unknown
t2.f:41:0: internal compiler error: Segmentation fault
0xb4e62f crash_signal
/export/users/gnutester/stability/svn/trunk/gcc/toplev.c:334
0x376583567f ???
/home/glibctest/rpmbuild/BUILD/glibc-2.17-c758a686/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7e7d0d verify_dominators(cdi_direction)
/export/users/gnutester/stability/svn/trunk/gcc/dominance.c:1033
0x7e7fa7 checking_verify_dominators
/export/users/gnutester/stability/svn/trunk/gcc/dominance.h:71
0x7e7fa7 calculate_dominance_info(cdi_direction)
/export/users/gnutester/stability/svn/trunk/gcc/dominance.c:664
0x9a178e ira
/export/users/gnutester/stability/svn/trunk/gcc/ira.c:5155
0x9a178e execute
/export/users/gnutester/stability/svn/trunk/gcc/ira.c:5511
