Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x2b7e564a15b0 (LWP 6965)]
0x00002b7e5456a692 in strcmp () from /lib/libc.so.6
(gdb) bt
#0  0x00002b7e5456a692 in strcmp () from /lib/libc.so.6
#1  0x0000000000998175 in ?? ()
#2  0x00000000004a5c6e in ?? ()
#3  0x00000000004955b3 in ?? ()
#4  0x000000000068f8f3 in ?? ()
#5  0x000000000060093b in ?? ()
#6  0x0000000000601acc in ?? ()
#7  0x0000000000d9f32b in ?? ()
#8  0x0000000000d9f7e8 in ?? ()
#9  0x0000000000d7ff55 in ?? ()
#10 0x0000000000c85c42 in ?? ()
#11 0x000000000046bb79 in ?? ()
#12 0x00002b7e545121f4 in __libc_start_main () from /lib/libc.so.6
#13 0x000000000043e559 in ?? ()
#14 0x00007fff57d09a88 in ?? ()
#15 0x0000000000000000 in ?? ()