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=-3.1 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=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 A68FF1F463 for ; Tue, 10 Sep 2019 00:28:25 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id 1BFF3120A82; Tue, 10 Sep 2019 09:28:17 +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 BA8A8120A82 for ; Tue, 10 Sep 2019 09:28:15 +0900 (JST) Received: by filter0144p3mdw1.sendgrid.net with SMTP id filter0144p3mdw1-13446-5D76EE22-1D 2019-09-10 00:28:18.216144465 +0000 UTC m=+27436.120371885 Received: from herokuapp.com (unknown [54.210.152.167]) by ismtpd0043p1mdw1.sendgrid.net (SG) with ESMTP id D6ceWtsoQwO2y_8OzzUmdA for ; Tue, 10 Sep 2019 00:28:18.123 +0000 (UTC) Date: Tue, 10 Sep 2019 00:28:18 +0000 (UTC) From: s.wanabe@gmail.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 70435 X-Redmine-Project: ruby-trunk X-Redmine-Issue-Id: 16161 X-Redmine-Issue-Author: wanabe X-Redmine-Sender: wanabe 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?FsuGSN1PD4adq4aDFRSSBF8ffe=2F4plpeX9T+dOtlSNY1y39dWAbkbvLZLSdsGe?= =?us-ascii?Q?dU2lk9jEzINu03XHhMWyJ1xJWFJwdAV3DC2Mdil?= =?us-ascii?Q?uuzaJc0g4Cbs+=2FMisCtT8p8CpV+UkXSmKeN4B12?= =?us-ascii?Q?EzzQLKJDK+aE3sQ57=2F1R8gHGQyfjX58IBMAxHX3?= =?us-ascii?Q?T+rSFVeMlDWXY=2FYNIL40jSU+ybMYj3GySBA=3D=3D?= To: ruby-core@ruby-lang.org X-ML-Name: ruby-core X-Mail-Count: 94881 Subject: [ruby-core:94881] [Ruby master Bug#16161] tailcall_optimization may be disabled after r67315 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 #16161 has been reported by wanabe (_ wanabe). ---------------------------------------- Bug #16161: tailcall_optimization may be disabled after r67315 https://bugs.ruby-lang.org/issues/16161 * Author: wanabe (_ wanabe) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: ruby 2.7.0dev (2019-09-09T23:18:03Z master 3678c37119) [x86_64-linux] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN ---------------------------------------- Before r67315: ``` $ ./miniruby -v -e 'iseq = RubyVM::InstructionSequence.compile("def foo(n, s = 0);return s if n < 1;foo(n - 1, n + s); end", tailcall_optimization: true); iseq.eval; p foo(900_000)' ruby 2.7.0dev (2019-03-20 trunk 67314) [x86_64-linux] 405000450000 ``` After r67315: ``` $ ./miniruby -v -e 'iseq = RubyVM::InstructionSequence.compile("def foo(n, s = 0);return s if n < 1;foo(n - 1, n + s); end", tailcall_optimization: true); iseq.eval; p foo(900_000)' ruby 2.7.0dev (2019-03-20 trunk 67315) [x86_64-linux] Traceback (most recent call last): 10080: from -e:1:in `
' 10079: from :1:in `foo' 10078: from :1:in `foo' 10077: from :1:in `foo' 10076: from :1:in `foo' 10075: from :1:in `foo' 10074: from :1:in `foo' 10073: from :1:in `foo' ... 10068 levels... 4: from :1:in `foo' 3: from :1:in `foo' 2: from :1:in `foo' 1: from :1:in `foo' :1:in `foo': stack level too deep (SystemStackError) ``` master: ``` $ ./miniruby -v -e 'iseq = RubyVM::InstructionSequence.compile("def foo(n, s = 0);return s if n < 1;foo(n - 1, n + s); end", tailcall_optimization: true); iseq.eval; p foo(900_000)' ruby 2.7.0dev (2019-09-09T23:18:03Z master 3678c37119) [x86_64-linux] Traceback (most recent call last): 10080: from -e:1:in `
' 10079: from :1:in `foo' 10078: from :1:in `foo' 10077: from :1:in `foo' 10076: from :1:in `foo' 10075: from :1:in `foo' 10074: from :1:in `foo' 10073: from :1:in `foo' ... 10068 levels... 4: from :1:in `foo' 3: from :1:in `foo' 2: from :1:in `foo' 1: from :1:in `foo' :1:in `foo': stack level too deep (SystemStackError) ``` I think ruby should not raise SystemStackError with tailcall_optimization, should it? -- https://bugs.ruby-lang.org/