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- To: KDF at MIT-AI
- From: MOON@MIT-MC
- Date: Sat ,28 Oct 79 07:02:37 EDT
CC: (BUG LISPM) at MIT-MC
KDF@MIT-AI 10/27/79 21:38:58
To: (BUG LISPM) at MIT-AI
The options of :break and :exitbreak do not seem to work. They don't
cause trace to error out (why can't it just type a ? style maclisp form instead
of bombing?), but just don't cause breaks.
They take a following argument of a condition on which to break. If you
omit it evidently it just takes CADR of NIL and gets NIL as the condition.
I guess it should be fixed to check for this and complain. What documentation
did you read that told you about the :break and :exitbreak options but
didn't mention that they take a follwoing argument?
If you use the trace operation in the system menu you won't be able to
input bad syntax, as it uses a menu of options and prompts you for