#0  0x00007fbf91ae34b5 in raise () from /lib/libc.so.6
No symbol table info available.
#1  0x00007fbf91ae6f50 in abort () from /lib/libc.so.6
No symbol table info available.
#2  0x00007fbf91adc481 in __assert_fail () from /lib/libc.so.6
No symbol table info available.
#3  0x0000000000450003 in ?? ()
No symbol table info available.
#4  0x000000000045bd1d in ?? ()
No symbol table info available.
#5  0x00007fbf931d70c1 in event_base_loop () from /usr/lib/libevent-1.4.so.2
No symbol table info available.
#6  0x000000000045bb3d in ?? ()
No symbol table info available.
#7  0x00007fbf92d99a04 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#8  0x00007fbf91b8f64d in clone () from /lib/libc.so.6
No symbol table info available.
#9  0x0000000000000000 in ?? ()
No symbol table info available.