[no subject]

[BAK@MIT-AI]

The various "Evaluate" commands in Zwei (evaluate region, evaluate defun) have
an erratic behaviour on CADR4, system 17.7.  The following forms cause errors
when you try to evaluate them in this manner: (+ 1 2) and (let ((a 1) (b 2)) (+ 1 2)) .
I have one (rather more complicated) form that causes zwei to get into a state in
which the machine is waiting for input, yet zwei does not respond to any characters
typed.