[no subject]

[KMP at MIT-MC (Kent M. Pitman)]

(SETPLIST 'FOO '(SOME THING))
(NCONC '(A . FOO) '(B . FOO) '(C . FOO))
will never return. Apparently (even with *RSET set!!) it traces down the
CDR of the atom. Creating an invisible circularity. The CDR of FOO becomes
first (SOME THING) then (SOME THING B . FOO) then it seems to CDR forever
looking for the end of the list! This shouldn't happen. It is gross to debug
and I would be willing to spend the time every NCONC to have it make this
check. I would like this to be an error.