send-super is a poor implementation

[marick]

send-super can only be used once. That is, the method called by a send-super cannot itself use send-super. The reason is that the method does not know which class it belongs to. To fix this, send-super would have to take an owner argument as well as a this argument. Dunno if that's worth it.

Note that the current implementation doesn't work at all once you introduce modules.