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Semantic difficulties

    Date: 06 Feb 87  2218 PST
    From: Dick Gabriel <RPG@SAIL.STANFORD.EDU>

    Possibly defining CALL-NEXT-METHOD to have dynamic extent within
    a generic function invocation along with Moon's clarification of
    100 Iterations of Call-Next-Methoditude would do the trick?

I don't think so.  I don't see why it should have dynamic extent
rather than indefinite extent like all other closures.  Furthermore,
changing the class in the middle of a method can make its valid
extent end even before dynamic extent ends.