avia@scotty:~$ gdb gzclient
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from gzclient...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/gzclient
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffd9e7e700 (LWP 2535)]
[New Thread 0x7fffd8f9b700 (LWP 2554)]
[Thread 0x7fffd8f9b700 (LWP 2554) exited]
[Thread 0x7fffd9e7e700 (LWP 2535) exited]
[Inferior 1 (process 2491) exited with code 0377]
(gdb) bt
No stack.
(gdb) backtrace
No stack.