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CC: (BUG LISPM) at MIT-MC
    ZVONA@MIT-AI 07/11/79 03:27:33
    To: (BUG LISPM) at MIT-AI
    (+1 foo) [in error for (1+ foo)] compiles funny. rather than causing an undefined-function
    error, it results in the application of nil. this is not exactly a bug, but it can be tricky
    to debug unless you know about it.
Fixed in the source (of QCP2).  I didn't fix the fact that a completely garbagey FEF
could be made if the compiler didn't test for this.  (The bug was that ATOM was used
instead of SYMBOLP).