Comment 8 for bug 1271004

Looks like stale slots were not the only problem (those were fixed in r13118). When an object is deleted, the selection emits the 'changed' signal, which in turn causes Inkscape::UI::Widget::SelectedStyle to be called, which calls the 'query_style' signal on the desktop. This invokes the query style method on the text tool, but its changed signal didn't have the chance to run yet, so the text tool contains dangling pointers to nonexistent objects.