user@hostname ~ $ gdb a.out
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from a.out...(no debugging symbols found)...done.
(gdb)
(gdb) run
Starting program: /home/max/P/Star/a.out

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb)