#0  0x00007f9bcb64d445 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = 16927
#1  0x00007f9bcb650bab in __GI_abort () at abort.c:91
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x18, sa_sigaction = 0x18}, sa_mask = {__val = {140307115485129, 140307108846664, 140307145877968, 1024, 0, 27821952, 4294967296, 4294967295, 0, 180, 28325280, 3088472, 0, 140307118037408, 25279664, 140307114946560}}, sa_flags = -847759500, sa_restorer = 0x5}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f9bcbc56d8d in g_assertion_message (domain=<optimized out>, file=<optimized out>, line=<optimized out>, func=0x7f9bcc67a9c0 "unregistered", message=0x1aca980 "assertion failed: (vtable != NULL && vtable->method_call != NULL)") at /build/buildd/glib2.0-2.31.20/./glib/gtestutils.c:1858
        lstr = "4678\000\177\000\000\260q\274\367\377\177\000\000\000\000\000\000\000\000\000\000\360\235g\314\233\177\000"
        s = 0x1b035a0 "\360o\254\001"
#3  0x00007f9bcbc572b2 in g_assertion_message_expr (domain=0x7f9bcc657d01 ")", file=0x421f <Address 0x421f out of bounds>, line=4678, func=0x7f9bcc67a9c0 "unregistered", expr=0x20 <Address 0x20 out of bounds>) at /build/buildd/glib2.0-2.31.20/./glib/gtestutils.c:1869
        s = <optimized out>
#4  0x000000000183b0c0 in ?? ()
No symbol table info available.
#5  0x00007f9bcc624c46 in invoke_set_property_in_idle_cb (_data=0x421f) at /build/buildd/glib2.0-2.31.20/./gio/gdbusconnection.c:4075
        data = 0x421f
        error = 0x7f9bcc67a9c0
        reply = <optimized out>
        value = 0x7f9bcc657d01
        __PRETTY_FUNCTION__ = "invoke_set_property_in_idle_cb"
#6  0x0000000000000000 in ?? ()
No symbol table info available.