#0  0x00007f2ffb619e37 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 22799
        selftid = 22799
#1  0x00007f2ffb61b528 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {0, 0, 0, 0, 0, 0, 139844061373440, 3617234925708640257, 21, 49, 139844061373440, 1, 21, 49, 20, 139844061374576}}, sa_flags = -76625032, sa_restorer = 0x37f}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f2ffb65b7a4 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7f2ffb764780 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
        ap = {{gp_offset = 40, fp_offset = 32765, overflow_arg_area = 0x7ffd1a599c50, reg_save_area = 0x7ffd1a599be0}}
        fd = 2
        on_2 = <optimized out>
        list = <optimized out>
        nlist = <optimized out>
        cp = <optimized out>
        written = <optimized out>
#3  0x00007f2ffb662db6 in malloc_printerr (ptr=<optimized out>, str=0x7f2ffb764948 "double free or corruption (fasttop)", action=1) at malloc.c:4996
        buf = "0000000000db60d0"
        cp = <optimized out>
#4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3840
        size = <optimized out>
        fb = <optimized out>
        nextchunk = <optimized out>
        nextsize = <optimized out>
        nextinuse = <optimized out>
        prevsize = <optimized out>
        bck = <optimized out>
        fwd = <optimized out>
        errstr = <optimized out>
        locked = <optimized out>
#5  0x00000000004027a7 in main ()
No symbol table info available.