#0  0x00007f2d301b6ff0 in lookup_type_node_I (type_instance=<value optimized out>, iface_type=139832090215592) at /build/buildd/glib2.0-2.29.14/./gobject/gtype.c:393
No locals.
#1  g_type_check_instance_is_a (type_instance=<value optimized out>, iface_type=139832090215592) at /build/buildd/glib2.0-2.29.14/./gobject/gtype.c:3950
        node = 0x7f2d00000140
        iface = 0x7f2d3210c4a8
        check = 0
#2  0x00007f2d301948ed in g_object_unref (_object=0x7f2d328a4640) at /build/buildd/glib2.0-2.29.14/./gobject/gobject.c:2680
        __r = 0
        __PRETTY_FUNCTION__ = "g_object_unref"
#3  0x00007f2d314ba2f2 in _gtk_pango_get_run_attributes (attributes=0x7f2d32832620, layout=<value optimized out>, offset=<value optimized out>, start_offset=0x7f2d30194682, end_offset=0x7f2d30190720) at /build/buildd/gtk+3.0-3.1.10/./gtk/gtkpango.c:462
        iter = 0x7f2d328abe60
        attr = <value optimized out>
        pango_string = <value optimized out>
        pango_int = <value optimized out>
        pango_color = <value optimized out>
        pango_lang = <value optimized out>
        pango_float = <value optimized out>
        index = <value optimized out>
        start_index = 846682544
        end_index = 32557
        is_next = <value optimized out>
        len = 139832097918976
        text = 0x7f2d321dcbb0 ""
        value = <value optimized out>
#4  0x00007f2d321a26d0 in ?? ()
No symbol table info available.
#5  0x00007f2d321dcce0 in ?? ()
No symbol table info available.
#6  0x00007f2d313ef2e7 in ?? () at /build/buildd/gtk+3.0-3.1.10/./gtk/gtkcontainer.c:2060 from /usr/lib/libgtk-3.so.0
No symbol table info available.
#7  0x00007f2d321a3c80 in ?? ()
No symbol table info available.
#8  0x00007f2d321a3c80 in ?? ()
No symbol table info available.
#9  0x0000000000000001 in ?? ()
No symbol table info available.
#10 0x0000000000000001 in ?? ()
No symbol table info available.
#11 0x0000000000000000 in ?? ()
No symbol table info available.