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=-3.9 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=ham 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 D82CF1F46C for ; Sat, 11 Jan 2020 22:45:04 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id D7505120A33; Sun, 12 Jan 2020 07:44:51 +0900 (JST) Received: from o1678948x4.outbound-mail.sendgrid.net (o1678948x4.outbound-mail.sendgrid.net [167.89.48.4]) by neon.ruby-lang.org (Postfix) with ESMTPS id 77779120A2E for ; Sun, 12 Jan 2020 07:44:49 +0900 (JST) Received: by filterdrecv-p3iad2-57f487d66-99q77 with SMTP id filterdrecv-p3iad2-57f487d66-99q77-18-5E1A4FE9-1D 2020-01-11 22:44:57.573409785 +0000 UTC m=+2239098.597475198 Received: from herokuapp.com (unknown [54.224.129.129]) by ismtpd0063p1mdw1.sendgrid.net (SG) with ESMTP id dyQhkgh9TCuVKkfMBQdJ0g for ; Sat, 11 Jan 2020 22:44:57.426 +0000 (UTC) Date: Sat, 11 Jan 2020 22:44:57 +0000 (UTC) From: me@jnito.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 72457 X-Redmine-Project: ruby-master X-Redmine-Issue-Id: 16503 X-Redmine-Issue-Author: jnchito X-Redmine-Sender: jnchito 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?RqlyyHaxK4stEMZOtmOI2x4R3N50wOhMw0IRBVENMoAOyx3lluXACBO5aivNV7?= =?us-ascii?Q?0344wvZ3DWqWMvW2D2YYm555jEOP6Bg7+cjFvWQ?= =?us-ascii?Q?Cd5j27t0yqgxzN2hyMxuMxYCWXd1fmoR6HV=2FIZP?= =?us-ascii?Q?mU2jMtGWFsjeZPUEqXye8Y2oe41fRlkO7GknryQ?= =?us-ascii?Q?CgzV9Qaq7EJueuVo9Nyja1ki1mfSSAjlPXQ=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 96794 Subject: [ruby-core:96794] [Ruby master Bug#16503] "ret: 2, hash modified during iteration" error in Ruby 2.7.0 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 #16503 has been reported by jnchito (Junichi Ito). ---------------------------------------- Bug #16503: "ret: 2, hash modified during iteration" error in Ruby 2.7.0 https://bugs.ruby-lang.org/issues/16503 * Author: jnchito (Junichi Ito) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-linux] (heroku-18 stack) * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN ---------------------------------------- I am running a Rails app on Heroku. After upgrading to Ruby 2.7, I sometimes get `ret: 2, hash modified during iteration` error. The same issue is reported here (I'm using meta-tags gem too): https://github.com/kpumuk/meta-tags/issues/209 This gem deletes elements while iterating hash (HashWithIndifferentAccess actually), so I guess it might involve this error: https://github.com/kpumuk/meta-tags/blob/v2.13.0/lib/meta_tags/renderer.rb#L168 https://github.com/kpumuk/meta-tags/blob/v2.13.0/lib/meta_tags/renderer.rb#L181 https://github.com/kpumuk/meta-tags/blob/v2.13.0/lib/meta_tags/meta_tags_collection.rb#L85 However, this error does not occur every time (sometimes works, sometimes fails), and it didn't occur in Ruby 2.6. So I'm wondering why. Do you have any idea on this? -- https://bugs.ruby-lang.org/