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From:     GSB@MIT-ML
Date: Thu, 21 Apr 78 01:10:06 GMT
Original-Date: 04/20/78 21:10:06 EDT
    To: (BUG LISP) at MIT-ML
    TTYINT for ^Z goes and does a reset blindly on the channel of the original
    tty input file array.  What if someone has re-setqed TYI and TYO, and
    the channel has been re-allocated to something else?

Right - this is a known screw.  The whole issue of when resets get done
in LISP needs recoding.  (At CN.Z, and also at CHECKI ff.  There really
ought to be a way for the user to say whether an interrupt character
should reset input on that TTY, so the new features of WHYINT/.ITYIC
or whatever can be exploited.)