From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS4713 221.184.0.0/13 X-Spam-Status: No, score=-2.6 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FORGED_GMAIL_RCVD,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=no autolearn_force=no version=3.4.2 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 5276B1F463 for ; Wed, 27 Nov 2019 11:43:28 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 958FC120A98; Wed, 27 Nov 2019 20:43:02 +0900 (JST) Received: from xtrwkhkc.outbound-mail.sendgrid.net (xtrwkhkc.outbound-mail.sendgrid.net [167.89.16.28]) by neon.ruby-lang.org (Postfix) with ESMTPS id C428B120A95 for ; Wed, 27 Nov 2019 20:42:59 +0900 (JST) Received: by filter0139p3mdw1.sendgrid.net with SMTP id filter0139p3mdw1-6656-5DDE6145-9 2019-11-27 11:43:01.129739163 +0000 UTC m=+647348.895399050 Received: from herokuapp.com (unknown [3.87.7.191]) by ismtpd0109p1mdw1.sendgrid.net (SG) with ESMTP id F-0pyKdAQ12FCv69eKpLpQ for ; Wed, 27 Nov 2019 11:43:01.002 +0000 (UTC) Date: Wed, 27 Nov 2019 11:43:01 +0000 (UTC) From: jean.boussier@gmail.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 71611 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 16377 X-Redmine-Issue-Author: byroot X-Redmine-Sender: byroot X-Mailer: Redmine X-Redmine-Host: bugs.ruby-lang.org X-Redmine-Site: Ruby Issue Tracking System X-Auto-Response-Suppress: All Auto-Submitted: auto-generated X-SG-EID: =?us-ascii?Q?AchqQMoUBMcQgz7gop0XiYUiatGIY7E61JGsTL4FvjcSDA4ZwNh+AGP7FiPPeL?= =?us-ascii?Q?nAO8oE5fPDYoXNZ4ss+0MdAkcWIZHfWDzv8JiUu?= =?us-ascii?Q?ZPOqArAfyp5nHubfFLSYj05A=2Fl1OfGiVIbxzJtb?= =?us-ascii?Q?0hR+1uitjX4A33I0PFta6kSQ=2FN6W3syGFXR6HFb?= =?us-ascii?Q?vxea7zWi9Uq9w+Cd8EAGZOnKAAYeSkvW=2FyA=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 95977 Subject: [ruby-core:95977] [Ruby master Feature#16377] Regexp literals should be frozen X-BeenThere: ruby-core@ruby-lang.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: Ruby developers List-Id: Ruby developers List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #16377 has been reported by byroot (Jean Boussier). ---------------------------------------- Feature #16377: Regexp literals should be frozen https://bugs.ruby-lang.org/issues/16377 * Author: byroot (Jean Boussier) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- The following script: ```ruby def mutate re = /foo/ state = re.instance_variable_get(:@state) re.instance_variable_set(:@state, state.to_i + 1) state end 3.times do p mutate end ``` Output this: ``` nil 1 2 ``` IMHO, you shouldn't be able to mutate an unduplicated literal. GitHub pull request: https://github.com/ruby/ruby/pull/2705 -- https://bugs.ruby-lang.org/