STEPPers on STORE

[JONL at MIT-MC (Jon L White)]

    Date: 15 February 1980 09:40-EST
    From: Robert W. Sjoberg <SJOBRG at MIT-AI>
    To: BUG-LISP at MIT-AI, BUG-STEP at MIT-AI
    .  .  .
    When I use the Rich Stepper, and try stepping through the
    macro expansion, everything is fine up to the step where
    the next thing to be eval'd is
    (store (arraycall fixnum foo 4) -37238.)
    Now, if I type <rubout>, everything is fine.  However, if I
    type <space> or M, I usually get a DIDN'T EVAL TO GOOD ARRAY
    REFERENCE - STORE.
Probably a bug in the stepper - you cant split the "evaluation" of
the array reference, in this case the "(arraycall fixnum foo 4)"
from the store;  possibly the stepper is splitting it in order to
allow you to "step" thru it?