#0  0x00007fb6f73d3445 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = 4212
#1  0x00007fb6f73d6bab in __GI_abort () at abort.c:91
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7fb6f29849d8, sa_sigaction = 0x7fb6f29849d8}, sa_mask = {__val = {140423810085277, 0, 1, 140737319686912, 140423808985314, 140423730842072, 206158430232, 140737319686928, 140737319686704, 140419668077870, 206158430256, 47626912, 170812517, 7310291569362429298, 0, 140737319693937}}, sa_flags = -145665629, sa_restorer = 0x7fb6f2984c92}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fb6f73cc10e in __assert_fail_base (fmt=<optimized out>, assertion=0x7fb6f29849d8 "!xcb_xlib_threads_sequence_lost", file=0x7fb6f2984c92 "../../src/xcb_io.c", line=<optimized out>, function=<optimized out>) at assert.c:94
        str = 0x2d6baa0 "\200c\324\002"
        total = 4096
#3  0x00007fb6f73cc1b2 in __GI___assert_fail (assertion=assertion@entry=0x7fb6f29849d8 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7fb6f2984c92 "../../src/xcb_io.c", line=line@entry=273, function=function@entry=0x7fb6f2984db8 "poll_for_event") at assert.c:103
No locals.
#4  0x00007fb6f2913a99 in poll_for_event (dpy=dpy@entry=0x220a800) at ../../src/xcb_io.c:270
        req = <optimized out>
        event = <optimized out>
        event_sequence = <optimized out>
        __PRETTY_FUNCTION__ = "poll_for_event"
#5  0x00007fb6f2913ab1 in poll_for_response (dpy=dpy@entry=0x220a800) at ../../src/xcb_io.c:288
        response = 0x0
        error = 0x0
        req = <optimized out>
        __PRETTY_FUNCTION__ = "poll_for_response"
#6  0x00007fb6f291401d in _XEventsQueued (dpy=dpy@entry=0x220a800, mode=mode@entry=2) at ../../src/xcb_io.c:362
        response = <optimized out>
#7  0x00007fb6f290566d in XPending (dpy=0x220a800) at ../../src/Pending.c:55
        ret_val = <optimized out>
#8  0x00007fb6f45c816e in gdk_check_xpending (display=<optimized out>) at /build/buildd/gtk+3.0-3.5.6/./gdk/x11/gdkeventsource.c:266
No locals.
#9  0x00007fb6f45c81c4 in gdk_event_source_check (source=source@entry=0x2229b00) at /build/buildd/gtk+3.0-3.5.6/./gdk/x11/gdkeventsource.c:297
        event_source = 0x2229b00
        retval = <optimized out>
#10 0x00007fb6f606c69b in g_main_context_check (context=context@entry=0x2235d00, max_priority=2147483647, fds=fds@entry=0x22090f0, n_fds=n_fds@entry=4) at /build/buildd/glib2.0-2.33.3/./glib/gmain.c:3023
        result = <optimized out>
        check = 0x7fb6f45c8170 <gdk_event_source_check>
        source = 0x2229b00
        pollrec = <optimized out>
        n_ready = <optimized out>
        i = <optimized out>
#11 0x00007fb6f606cb22 in g_main_context_iterate (context=0x2235d00, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.3/./glib/gmain.c:3143
        max_priority = 2147483647
        timeout = 12885
        some_ready = <optimized out>
        nfds = 4
        allocated_nfds = <optimized out>
        fds = 0x22090f0
#12 0x00007fb6f606cfe2 in g_main_loop_run (loop=0x2e46180) at /build/buildd/glib2.0-2.33.3/./glib/gmain.c:3340
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#13 0x00007fb6f095f3a5 in gtk_main () at /build/buildd/gtk+3.0-3.5.6/./gtk/gtkmain.c:1162
        loop = 0x2e46180
#14 0x00007fb6f56b8bb8 in ffi_call_unix64 () at ../src/x86/unix64.S:75
No locals.
#15 0x00007fb6f56b85c0 in ffi_call (cif=cif@entry=0x7ffff5f256b0, fn=fn@entry=0x7fb6f095f320 <gtk_main>, rvalue=rvalue@entry=0x7ffff5f25690, avalue=avalue@entry=0x7ffff5f255f0) at ../src/x86/ffi64.c:492
        classes = {47443104, X86_64_NO_CLASS, X86_64_NO_CLASS, X86_64_NO_CLASS}
        stack = 0x7ffff5f25440 ""
        argp = 0x7ffff5f254f0 ""
        arg_types = <optimized out>
        gprcount = 0
        ssecount = <optimized out>
        ngpr = 0
        nsse = 0
        i = <optimized out>
        avn = <optimized out>
        ret_in_memory = <optimized out>
        reg_args = 0x7ffff5f25440
#16 0x00007fb6f6573c44 in g_callable_info_invoke (info=info@entry=0x2d3eca0, function=0x7fb6f095f320, in_args=in_args@entry=0x0, n_in_args=n_in_args@entry=0, out_args=out_args@entry=0x0, n_out_args=n_out_args@entry=0, return_value=return_value@entry=0x7ffff5f25890, is_method=is_method@entry=0, throws=0, error=error@entry=0x7ffff5f25848) at girepository/gicallableinfo.c:610
        cif = {abi = FFI_UNIX64, nargs = 0, arg_types = 0x7ffff5f25600, rtype = 0x7fb6f56b8fa0, bytes = 0, flags = 0}
        rtype = 0x7fb6f56b8fa0
        atypes = 0x7ffff5f25600
        tinfo = <optimized out>
        rinfo = 0x2e2d280
        rtag = GI_TYPE_TAG_VOID
        ainfo = <optimized out>
        n_args = 0
        n_invoke_args = 0
        in_pos = 0
        out_pos = <optimized out>
        i = <optimized out>
        args = 0x7ffff5f255f0
        success = 0
        local_error = 0x0
        error_address = 0x7ffff5f256a0
        ffi_return_value = {v_boolean = -168667304, v_int8 = 88 'X', v_uint8 = 88 'X', v_int16 = 22360, v_uint16 = 22360, v_int32 = -168667304, v_uint32 = 4126299992, v_int64 = 140737319688024, v_uint64 = 140737319688024, v_float = -6.14407901e+32, v_double = 6.953347474562956e-310, v_short = 22360, v_ushort = 22360, v_int = -168667304, v_uint = 4126299992, v_long = 140737319688024, v_ulong = 140737319688024, v_ssize = 140737319688024, v_size = 140737319688024, v_string = 0x7ffff5f25758 " \363\225\360\266\177", v_pointer = 0x7ffff5f25758}
        return_value_p = 0x7ffff5f25690
        __PRETTY_FUNCTION__ = "g_callable_info_invoke"
#17 0x00007fb6f6574fab in g_function_info_invoke (info=info@entry=0x2d3eca0, in_args=0x0, n_in_args=0, out_args=0x0, n_out_args=0, return_value=return_value@entry=0x7ffff5f25890, error=error@entry=0x7ffff5f25848) at girepository/gifunctioninfo.c:274
        symbol = <optimized out>
        func = 0x7fb6f095f320
        is_method = 0
        throws = <optimized out>
#18 0x00007fb6f67af5fa in _invoke_callable (function_ptr=0, callable_info=0x2d3eca0, cache=0x2d00800, state=0x7ffff5f25850) at /build/buildd/pygobject-3.3.3.1/gi/pygi-invoke.c:64
Python Exception <class 'gdb.error'> There is no member named ma_mask.: 
        _save = 0x0
        error = 0x0
        retval = <optimized out>
#19 pygi_callable_info_invoke (info=0x2d3eca0, py_args=<optimized out>, kwargs=, cache=<optimized out>, function_ptr=0, user_data=0x0) at /build/buildd/pygobject-3.3.3.1/gi/pygi-invoke.c:649
        state = {py_in_args = (), n_py_in_args = 0, current_arg = 0, implementor_gtype = 0, args = 0x0, in_args = 0x0, out_args = 0x0, out_values = 0x0, return_arg = {v_boolean = 0, v_int8 = 0 '\000', v_uint8 = 0 '\000', v_int16 = 0, v_uint16 = 0, v_int32 = 0, v_uint32 = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_short = 0, v_ushort = 0, v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_ssize = 0, v_size = 0, v_string = 0x0, v_pointer = 0x0}, error = 0x0, failed = 0, user_data = 0x0}
        ret = 0x0
#20 0x000000000045e54a in PyEval_EvalFrameEx ()
No locals.
#21 0x00000000004604dd in PyEval_EvalCodeEx ()
No locals.
#22 0x000000000045c407 in PyEval_EvalFrameEx ()
No locals.
#23 0x00000000004604dd in PyEval_EvalCodeEx ()
No locals.
#24 0x000000000045c407 in PyEval_EvalFrameEx ()
No locals.
#25 0x000000000046002d in PyEval_EvalCodeEx ()
No locals.
#26 0x000000000045c407 in PyEval_EvalFrameEx ()
No locals.
#27 0x000000000045be6f in PyEval_EvalFrameEx ()
No locals.
#28 0x000000000045be6f in PyEval_EvalFrameEx ()
No locals.
#29 0x000000000046002d in PyEval_EvalCodeEx ()
No locals.
#30 0x0000000000460b9b in PyEval_EvalCode ()
No locals.
#31 0x0000000000480ce5 in run_mod ()
No locals.
#32 0x0000000000482791 in PyRun_FileExFlags ()
No locals.
#33 0x00000000004831f9 in PyRun_SimpleFileExFlags ()
No locals.
#34 0x0000000000494033 in Py_Main ()
No locals.
#35 0x000000000041d307 in main ()
No locals.