Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: Notesfiles $Revision: 1.7.0.8 $; site uiucuxc Path: utzoo!linus!philabs!cmcl2!seismo!lll-crg!dual!qantel!ihnp4!inuxc!pur-ee!uiucdcs!uiucuxc!chandra From: chandra@uiucuxc.Uiuc.ARPA Newsgroups: net.lang.lisp Subject: HELP: a bug in my lisp interpreter! Message-ID: <16700002@uiucuxc> Date: Thu, 8-Aug-85 10:32:00 EDT Article-I.D.: uiucuxc.16700002 Posted: Thu Aug 8 10:32:00 1985 Date-Received: Tue, 13-Aug-85 01:28:46 EDT Lines: 32 Nf-ID: #N:uiucuxc:16700002:000:730 Nf-From: uiucuxc.Uiuc.ARPA!chandra Aug 8 09:32:00 1985 HELP: A strange Bug! I got an exprimental lisp from a friend to play with. It has a strange bug. Here is a session which illustrates the bug. Notice how the variable foo gets changed after the eval is called. ==> (defun test macro (args) `(cdr (quote ,(cadr args)))) test ==> (test (a b c d)) (b c d) ==> (setq foo '(test (a b c d))) (test (a b c d)) ==> (eval foo) (b c d) ==> foo (cdr '(a b c d)) ; why did the foo change? I tried the same thing in real MAClisp and Franz ; and the value of foo was retained and was not changed. ; Have you got any idea what went wrong? Thank you Navin Chandra (to reply: please post a response on the net.lang.lisp, mail never really seems to reach me)