5
-->00
00
Bytes sent: 0
-->05
05
Bytes sent: 5

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16386 (LWP 22779)]
0x00000000 in ?? ()
(gdb) bt
#0  0x00000000 in ?? ()
(gdb) thread apply all bt

Thread 3 (Thread 16386 (LWP 22779)):
#0  0x00000000 in ?? ()

Thread 2 (Thread 32769 (LWP 22778)):
#0  0x40bc5d09 in poll () from /lib/i686/libc.so.6
#1  0x405e8430 in __pthread_manager () from /lib/i686/libpthread.so.0
#2  0x405e8e57 in __pthread_manager_event () from /lib/i686/libpthread.so.0
#3  0x40bcf4ea in clone () from /lib/i686/libc.so.6
#4  0x08066120 in ?? ()

Thread 1 (Thread 16384 (LWP 22769)):
#0  0x40bc5d09 in poll () from /lib/i686/libc.so.6
#1  0x0804c370 in main (argc=1, argv=0xbfb3ede4) at ldtp.c:149
#0  0x00000000 in ?? ()
(gdb)