The following simple program crashes with segfault:

int main(void)
{
    GObject *obj;

    g_mem_set_vtable(glib_mem_profiler_table);

    obj = g_object_new(G_TYPE_OBJECT, NULL);
    g_object_unref(obj);
    g_mem_profile();
    return 0;
}

But if you comment out g_mem_set_vtable(...) line, everything works fine.