#0  0x00007f42d2cf5a0c in __GI___libc_free (mem=0x7fff3f50f8c0) at malloc.c:2906
        ar_ptr = <optimized out>
        p = 0x7fff3f50f8b0
        hook = <optimized out>
#1  0x0000000000413b20 in ?? ()
No symbol table info available.
#2  0x00000000004150d5 in ?? ()
No symbol table info available.
#3  0x000000000040ba6b in ?? ()
No symbol table info available.
#4  0x0000000000411b81 in ?? ()
No symbol table info available.
#5  0x000000000041258b in ?? ()
No symbol table info available.
#6  0x000000000040917f in ?? ()
No symbol table info available.
#7  0x0000000000407047 in ?? ()
No symbol table info available.
#8  0x00007f42d2c93ea5 in __libc_start_main (main=0x406ce0, argc=1, ubp_av=0x7fff3f50fc68, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff3f50fc58) at libc-start.c:260
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3704369020131287575, 4223368, 140734255660128, 0, 0, -3704508254235975145, -3608181077919063529}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x419ea0, 0x7fff3f50fc68}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4300448}}}
        not_first_call = <optimized out>
#9  0x00000000004071b1 in ?? ()
No symbol table info available.