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 62E641F463 for ; Thu, 2 Jan 2020 23:08:49 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 78D82120932; Fri, 3 Jan 2020 08:08:32 +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 48CC912092B for ; Fri, 3 Jan 2020 08:08:30 +0900 (JST) Received: by filterdrecv-p3mdw1-56c97568b5-cmkgv with SMTP id filterdrecv-p3mdw1-56c97568b5-cmkgv-18-5E0E77F0-1D 2020-01-02 23:08:32.262885422 +0000 UTC m=+1463125.857632032 Received: from herokuapp.com (unknown [3.89.196.85]) by ismtpd0011p1iad2.sendgrid.net (SG) with ESMTP id QQF3ulFcT6O8gzgbH7Aomg for ; Thu, 02 Jan 2020 23:08:32.085 +0000 (UTC) Date: Thu, 02 Jan 2020 23:08:32 +0000 (UTC) From: daniel@dan42.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 72299 X-Redmine-Project: ruby-master X-Redmine-Issue-Id: 16473 X-Redmine-Issue-Author: puchuu X-Redmine-Sender: Dan0042 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?8sy4RigFvRTdBfCVJrT9zb2J88PC92TMQwdNgaWYaq4EmMNAwFpqSWYocRal+S?= =?us-ascii?Q?cGbOQXUZC+pU5LTkvlIK4J+sw3gXTuVHXYR16NU?= =?us-ascii?Q?UOUqVJgWbt9Dvlr0UQdzgsEc2Ta0nprCrDQjNDk?= =?us-ascii?Q?A3pHTtAhWKLlXYe7PRdGiMH6qEm9SRL9jDorZkC?= =?us-ascii?Q?7JcmZdnSeqfAeD1zoFnzK6XJCM7mAQykbx1eypq?= =?us-ascii?Q?jfKy6dn5+vnfHR8wQ=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 96637 Subject: [ruby-core:96637] [Ruby master Bug#16473] New deprecated warning disallows keyword arguments bypassing 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 #16473 has been updated by Dan0042 (Daniel DeLorme). In this particular case there would be a bug if `*args` had more than one element, so I think the cleaner fix would be ```ruby def non_kw(a = {}, b = {}) puts "non kw #{a}" kw **b end ``` I really think the `ruby2_keywords` workaround should be strictly reserved for cases where portability and generic delegation _require_ it. ---------------------------------------- Bug #16473: New deprecated warning disallows keyword arguments bypassing https://bugs.ruby-lang.org/issues/16473#change-83606 * Author: puchuu (Andrew Aladjev) * Status: Rejected * Priority: Normal * Assignee: * Target version: * ruby -v: 2.7.0 * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN ---------------------------------------- Hello. I see that ruby 2.7.0 prints unnecessary deprecated warning during arguments bypassing. ```ruby def kw(a: 1) puts "kw #{a}" end def non_kw(a = {}, *args) puts "non kw #{a}" kw *args end non_kw({ :a => 2 }, :a => 2) non_kw({ :a => 3 }) non_kw ``` The right output is: ``` non kw {:a=>2} kw 2 non kw {:a=>3} kw 1 non kw {} kw 1 ``` Ruby 2.7.0 provides deprecated warning: ```ruby warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call ``` `*args` is bypassing arguments without any conversion. It looks like ruby converts last hash to keywords and than converts it back to hash. I think it is a bug. -- https://bugs.ruby-lang.org/