#0  0x00007f655754b2ef in g_cclosure_marshal_VOID__BOOLEAN (closure=0x1a949c0, return_value=<value optimized out>, n_param_values=<value optimized out>, param_values=0x0, invocation_hint=<value optimized out>, marshal_data=0x1a949c0) at /build/buildd/glib2.0-2.29.10/./gobject/gmarshal.c:114
        callback = <value optimized out>
        cc = 0x1a949c0
        data1 = <value optimized out>
        data2 = <value optimized out>
        __PRETTY_FUNCTION__ = "g_cclosure_marshal_VOID__BOOLEAN"
#1  0x00007f65582fc220 in check_setugid () at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkmain.c:431
        ruid = 27272592
        euid = <value optimized out>
        suid = 0
        rgid = <value optimized out>
        egid = <value optimized out>
        sgid = <value optimized out>
#2  0x00007f6558315efd in gtk_menu_shell_real_insert (menu_shell=0x1a949c0, child=0x50, position=27775024) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkmenushell.c:634
        priv = <value optimized out>
#3  0x00007ffff93d4120 in ?? ()
No symbol table info available.
#4  0x00000000019fa170 in ?? ()
No symbol table info available.
#5  0x0000000000000001 in ?? ()
No symbol table info available.
#6  0x00007f65582fc42d in synth_crossing_for_grab_notify (from=0x0, to=0x1891050, devices=0x0, mode=GDK_CROSSING_NORMAL, info=<value optimized out>) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkmain.c:2042
        device = <error reading variable device (Cannot access memory at address 0x0)>
        from_window = <value optimized out>
        to_window = <value optimized out>
#7  0x0000000001906610 in ?? ()
No symbol table info available.
#8  0x0000000001a7d030 in ?? ()
No symbol table info available.
#9  0x0000000001edcf40 in ?? ()
No symbol table info available.
#10 0x000000000193f090 in ?? ()
No symbol table info available.
#11 0x0000000001edc660 in ?? ()
No symbol table info available.
#12 0x00007f65575485f0 in value_to_ffi_type (gvalue=0x0, value=0x1891050) at /build/buildd/glib2.0-2.29.10/./gobject/gclosure.c:1008
        rettype = 0x1a02590
        type = <value optimized out>
        __PRETTY_FUNCTION__ = "value_to_ffi_type"
#13 0x0000000000000000 in ?? ()
No symbol table info available.