#0  _IO_new_fclose (fp=0x0) at iofclose.c:54
        status = <optimized out>
#1  0x0000000000405905 in ?? ()
No symbol table info available.
#2  0x00007f679c5496aa in start_thread (arg=0x7f6791e70700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6791e70700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140082806195968, -2851604143021285572, 0, 140731680833055, 140082806196672, 0, 2783843517769654076, 2783833195638234940}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007f679a7aaeed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.