A Compose sequence whose result is more than one character has no
keysym, so xkb_compose_state_get_one_sym gave nothing and the result was
lost; the UTF-8 the compose state holds is committed instead. Clients
that ask for a StatusNone style — fcitx5 offers them — failed to create
an input context; the three preedit styles come in both status flavours
now. IBus SetCursorLocation returned an error for a negative width or
height that nothing reads and no client ever waits for.