#0  0x00007f1d75ec9ba5 in raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        pid = <value optimized out>
        selftid = <value optimized out>
#1  0x00007f1d75ecd6b0 in abort () at abort.c:92
        act = {__sigaction_handler = {sa_handler = 0x7fff12b71c20, sa_sigaction = 0x7fff12b71c20}, sa_mask = {__val = {140733507378400, 140733507386080, 60, 139764510356164, 3, 140733507378410, 6, 139764510356168, 2, 140733507378398, 2, 139764510347192, 1, 139764510356164, 3, 140733507378404}}, sa_flags = 12, sa_restorer = 0x7f1d75fdf2c8}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f1d75f0343b in __libc_message (do_abort=<value optimized out>, fmt=<value optimized out>) at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
        ap = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7fff12b72660, reg_save_area = 0x7fff12b72570}}
        ap_copy = {{gp_offset = 16, fp_offset = 48, overflow_arg_area = 0x7fff12b72660, reg_save_area = 0x7fff12b72570}}
        fd = 2
        on_2 = <value optimized out>
        list = <value optimized out>
        nlist = 0
        cp = <value optimized out>
        written = false
#3  0x00007f1d75f0d4b6 in malloc_printerr (action=3, str=0x7f1d75fe1030 "double free or corruption (fasttop)", ptr=<value optimized out>) at malloc.c:6283
        buf = "0000000002087fd0"
        cp = 0x7f1d75fd6fe0 "0123456789abcdefghijklmnopqrstuvwxyz"
#4  0x00007f1d75f13c83 in __libc_free (mem=<value optimized out>) at malloc.c:3738
        ar_ptr = 0x7f1d76214e40
        p = 0x7f1d75fd6fe0
#5  0x00007f1d76461b6c in g_list_foreach (list=<value optimized out>, func=0x403e20, user_data=0x207dc00) at /build/buildd/glib2.0-2.26.1/glib/glist.c:919
        next = 0x0
#6  0x00000000004042c8 in ?? ()
No symbol table info available.
#7  0x00007f1d76b23d8a in g_object_unref (_object=<value optimized out>) at /build/buildd/glib2.0-2.26.1/gobject/gobject.c:2675
        object = 0x207dc00
        old_ref = 1
        __PRETTY_FUNCTION__ = "g_object_unref"
#8  0x0000000000402706 in ?? ()
No symbol table info available.
#9  0x00007f1d75eb4d8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff12b72828) at libc-start.c:226
        result = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -8213331483521655241, 4203888, 140733507381296, 0, 0, 8212955925391662647, 8088053020790283831}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x405e20, 0x7fff12b72838}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4218400}}}
        not_first_call = <value optimized out>
#10 0x0000000000402599 in ?? ()
No symbol table info available.
#11 0x00007fff12b72828 in ?? ()
No symbol table info available.
#12 0x000000000000001c in ?? ()
No symbol table info available.
#13 0x0000000000000001 in ?? ()
No symbol table info available.
#14 0x00007fff12b73ae0 in ?? ()
No symbol table info available.
#15 0x0000000000000000 in ?? ()
No symbol table info available.