.
Thread 1 (Thread 19536):
#0  0x00007fe7754afab7 in vfprintf () from /lib/libc.so.6
#1  0x00007fe7754b11d0 in ?? () from /lib/libc.so.6
#2  0x00007fe7754abfde in vfprintf () from /lib/libc.so.6
#3  0x00007fe77555d0a7 in __vfprintf_chk () from /lib/libc.so.6
#4  0x000000000040143f in option_error ()
#5  0x0000000000401770 in parse_short_options ()
#6  0x00000000004017e3 in parse_options ()
#7  0x00000000004019f4 in main ()