From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: slbtty Newsgroups: gmane.lisp.guile.bugs Subject: bug#58066: pretty-print will make data modified by set-cdr! to random value Date: Sat, 24 Sep 2022 06:01:13 -0400 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="30471"; mail-complaints-to="usenet@ciao.gmane.io" To: 58066@debbugs.gnu.org Original-X-From: bug-guile-bounces+guile-bugs=m.gmane-mx.org@gnu.org Sun Sep 25 09:44:21 2022 Return-path: Envelope-to: guile-bugs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ocMJJ-0007gj-45 for guile-bugs@m.gmane-mx.org; Sun, 25 Sep 2022 09:44:21 +0200 Original-Received: from localhost ([::1]:46952 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ocMJH-00057J-Pp for guile-bugs@m.gmane-mx.org; 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Sat, 24 Sep 2022 03:01:49 -0700 (PDT) Received-SPF: pass client-ip=2a00:1450:4864:20::12a; envelope-from=shenlebantongying@gmail.com; helo=mail-lf1-x12a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sun, 25 Sep 2022 03:43:55 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane-mx.org@gnu.org Original-Sender: "bug-guile" Xref: news.gmane.io gmane.lisp.guile.bugs:10378 Archived-At: GNU Guile 3.0.8 Using `guile3 < file.scm` to run the code below will makes the result of tp unpredictable (pointing to very random things) (use-modules (ice-9 pretty-print)) (define tl '(1 2)) (define tp (cdr tl)) (set-cdr! tp (cons 3 '())) (pretty-print tl) (pretty-print tp) --- However, if i use plain old (display tp), the code will out put expected valve (1 2 3) (3) (define tl '(1 2)) (define tp (cdr tl)) (set-cdr! tp (cons 3 '())) (display tl) (newline) (display tp) (newline) --- Context: I am using guile3's repl and whenever i access a variable's by typing its name after (set-cdr!), the result will goes wild.