#0  0x00007faff38483b5 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = <optimized out>
#1  0x00007faff384bb1b in __GI_abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x4, sa_sigaction = 0x4}, sa_mask = {__val = {5, 140734822910380, 7, 140393682771152, 3, 140734822890426, 6, 140393682771156, 2, 140734822890446, 2, 140393682762151, 1, 140393682771152, 3, 140734822890420}}, sa_flags = 12, sa_restorer = 0x7faff3971cd4}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007faff3883f73 in __libc_message (do_abort=2, fmt=0x7faff3973728 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
        ap = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7fff61204530, reg_save_area = 0x7fff61204440}}
        ap_copy = {{gp_offset = 16, fp_offset = 48, overflow_arg_area = 0x7fff61204530, reg_save_area = 0x7fff61204440}}
        fd = 2
        on_2 = <optimized out>
        list = <optimized out>
        nlist = <optimized out>
        cp = <optimized out>
        written = <optimized out>
#3  0x00007faff388e8f6 in malloc_printerr (action=3, str=0x7faff3970741 "free(): invalid pointer", ptr=<optimized out>) at malloc.c:6283
        buf = "0000000000f4fcf0"
        cp = <optimized out>
#4  0x00007faff3892bdc in __GI___libc_free (mem=<optimized out>) at malloc.c:3738
        ar_ptr = 0x7faff3baf1c0
        p = <optimized out>
        hook = <optimized out>
#5  0x00007fafec4d2928 in ?? ()
No symbol table info available.
#6  0x000000000164d0e8 in ?? ()
No symbol table info available.
#7  0x000000000164d0e8 in ?? ()
No symbol table info available.
#8  0x000000000164d0e0 in ?? ()
No symbol table info available.
#9  0x000000000164d0f0 in ?? ()
No symbol table info available.
#10 0x0000000000000001 in ?? ()
No symbol table info available.
#11 0x00007faff256db73 in g_object_unref (_object=0x164d0e0) at /build/buildd/glib2.0-2.31.16/./gobject/gobject.c:3008
        weak_locations = <optimized out>
        object = 0x164d0e0
        old_ref = <optimized out>
        __PRETTY_FUNCTION__ = "g_object_unref"
#12 0x00007fafec4c1f49 in ?? ()
No symbol table info available.
#13 0x00000000018220b0 in ?? ()
No symbol table info available.
#14 0x00000000018220b0 in ?? ()
No symbol table info available.
#15 0x0000000000000000 in ?? ()
No symbol table info available.