P.S. to previous

[Moon at MIT-AI (David A. Moon)]

Ah, it doesn't really clobber the buffer.  It creates a not-fully initialized buffer
which is in the data structure under the name of the file being found, but sets
*INTERVAL* to that without really switching to it.  By immediately hitting call
and doing (ed "filename") of some other file then using ^X^B and the mouse to
get back to the buffer that I thought was clobbered I can get it back.

Probably the bug is simply that it changes the permanent data structure too soon,
and/or doesn't bind some specials that are implicit arguments to subroutines
called by FIND-FILE.