.
Thread 1 (Thread 0x7f302ec3b740 (LWP 2725)):
#0  0x0000000000448a9b in ?? ()
No symbol table info available.
#1  0x00000000004a51dc in ?? ()
No symbol table info available.
#2  0x00000000004a2536 in ?? ()
No symbol table info available.
#3  0x0000000000446db5 in ?? ()
No symbol table info available.
#4  0x0000000000424786 in ?? ()
No symbol table info available.
#5  0x00000000004087a4 in ?? ()
No symbol table info available.
#6  0x00007f302d24976d in __libc_start_main (main=0x4077f0, argc=1, ubp_av=0x7fff816ff4d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff816ff4c8) at libc-start.c:226
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -5815264443538083759, 4229832, 140735364986064, 0, 0, 5814997125174653009, 5849152844973994065}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x4a8ff0, 0x7fff816ff4d8}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4886512}}}
        not_first_call = <optimized out>
#7  0x0000000000408af1 in ?? ()
No symbol table info available.
#8  0x00007fff816ff4c8 in ?? ()
No symbol table info available.
#9  0x000000000000001c in ?? ()
No symbol table info available.
#10 0x0000000000000001 in ?? ()
No symbol table info available.
#11 0x00007fff8170138b in ?? ()
No symbol table info available.
#12 0x0000000000000000 in ?? ()
No symbol table info available.