LINMODE AND READLINE

["Guy L. Steele, Jr." <GLS at MIT-AI>]

What you observe is indeed the case, but it is not clear
that this is a bug.  Line mode says that input comes in complete
lines.  However, S-expresions do not, and certainly after
the read-eval-print loop has read the expression (READLINE)
there is still a <cr> left there.  Perhaps what you wanted was
(PROGN (CLEAR-INPUT) (READLINE))
FOOBAR
returning "FOOBAR".  In any case, you do need something to
swallow any extra input lying around.  (Again, consider
typing all on one line:
(SETQ X (READLINE)) (PRINT X)
Then X would get " (PRINT X)", and the PRINT would not be evaluated.)