(gdb) bt
#0  0x000000080483bf67 in sscanf () from /lib/libc.so.7
#1  0x000000000064cdc5 in vsscanf ()
#2  0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#3  0x000000000064cdc5 in vsscanf ()
#4  0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#5  0x000000000064cdc5 in vsscanf ()
#6  0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#7  0x000000000064cdc5 in vsscanf ()
#8  0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#9  0x000000000064cdc5 in vsscanf ()
#10 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#11 0x000000000064cdc5 in vsscanf ()
#12 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#13 0x000000000064cdc5 in vsscanf ()
#14 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#15 0x000000000064cdc5 in vsscanf ()
#16 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#17 0x000000000064cdc5 in vsscanf ()
#18 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#19 0x000000000064cdc5 in vsscanf ()
#20 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#21 0x000000000064cdc5 in vsscanf ()
#22 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#23 0x000000000064cdc5 in vsscanf ()
#24 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#25 0x000000000064cdc5 in vsscanf ()
#26 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#27 0x000000000064cdc5 in vsscanf ()
#28 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#29 0x000000000064cdc5 in vsscanf ()
#30 0x000000080483bfe8 in sscanf () from /lib/libc.so.7
#31 0x000000000064cdc5 in vsscanf ()