.
Thread 1 (Thread 0x7f6e9b0b2780 (LWP 2000)):
#0  0x0000000000405df6 in ?? ()
No symbol table info available.
#1  0x0000000000403c7d in ?? ()
No symbol table info available.
#2  0x0000000000405fa3 in ?? ()
No symbol table info available.
#3  0x0000000000401eb5 in ?? ()
No symbol table info available.
#4  0x00007f6e9a103ea5 in __libc_start_main (main=0x401990, argc=1, ubp_av=0x7fff0773d498, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff0773d488) at libc-start.c:260
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -3611485791047155427, 4202644, 140733318419600, 0, 0, 3611713354923737373, 3691923577083887901}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x406840, 0x7fff0773d498}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4220992}}}
        not_first_call = <optimized out>
#5  0x00000000004020bd in ?? ()
No symbol table info available.