From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Newsgroups: gmane.emacs.bugs Subject: bug#59426: 29.0.50; [tree-sitter] Some functions exceed maximum recursion limit Date: Tue, 22 Nov 2022 10:08:25 +0100 Message-ID: References: <87wn7o6c9c.fsf@yahoo.com> <701BF611-6506-403E-B70B-2D93F3339E0C@acm.org> <83v8n82yzl.fsf@gnu.org> <83fsec2qq3.fsf@gnu.org> <83edtw2pz3.fsf@gnu.org> <835yf82oc4.fsf@gnu.org> Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31622"; mail-complaints-to="usenet@ciao.gmane.io" Cc: luangruo@yahoo.com, 59426@debbugs.gnu.org, Eli Zaretskii , stefankangas@gmail.com To: Yuan Fu Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Nov 22 10:09:23 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1oxPHP-00080K-9O for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 22 Nov 2022 10:09:23 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oxPH6-0000bB-9a; Tue, 22 Nov 2022 04:09:04 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oxPH4-0000WB-Tk for bug-gnu-emacs@gnu.org; Tue, 22 Nov 2022 04:09:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oxPH4-0003XL-Gh for bug-gnu-emacs@gnu.org; Tue, 22 Nov 2022 04:09:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oxPH4-0006Km-Be for bug-gnu-emacs@gnu.org; Tue, 22 Nov 2022 04:09:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 22 Nov 2022 09:09:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 59426 X-GNU-PR-Package: emacs Original-Received: via spool by 59426-submit@debbugs.gnu.org id=B59426.166910811524315 (code B ref 59426); Tue, 22 Nov 2022 09:09:02 +0000 Original-Received: (at 59426) by debbugs.gnu.org; 22 Nov 2022 09:08:35 +0000 Original-Received: from localhost ([127.0.0.1]:49746 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oxPGd-0006K7-9i for submit@debbugs.gnu.org; Tue, 22 Nov 2022 04:08:35 -0500 Original-Received: from mail156c50.megamailservers.eu ([91.136.10.166]:49616 helo=mail51c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oxPGa-0006Jx-JZ for 59426@debbugs.gnu.org; Tue, 22 Nov 2022 04:08:33 -0500 X-Authenticated-User: mattiase@bredband.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1669108110; bh=Nk8QSJkzpVpbXp1AYRgTR/IA48UND/dw/IJSOFyxifA=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=pNJoSbBBfC7r+6oUIHFOPboM0aiWYhTuQwetO8UGo5pZIrUll47Al7QLgUW4bZfHN asnP4nGDI1AQ0+0sfEh/mFH/GgPJr82o/xmufPfCMhdI2uCmVU2EdeIehHf5cJGBia jJMflvmoNTxBMLSRUiaqoHKZracFS35RtNmr6dTs= Feedback-ID: mattiase@acm.or Original-Received: from smtpclient.apple (c188-150-171-209.bredband.tele2.se [188.150.171.209]) (authenticated bits=0) by mail51c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 2AM98Qkw015184; Tue, 22 Nov 2022 09:08:27 +0000 In-Reply-To: X-Mailer: Apple Mail (2.3654.120.0.1.13) X-CTCH-RefID: str=0001.0A782F27.637C918E.0051, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-Origin-Country: SE X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:248618 Archived-At: 21 nov. 2022 kl. 20.00 skrev Yuan Fu : > Fortunately tree-sitter doesn=E2=80=99t need a deep stack. I don=E2=80=99= t think any human-written or even machine generated source file is ever = intended to parse into a tree of more than 1k level. Eg, who would = write/generate a function that has thousands level of nested brackets = {{{{{{{{{{{{{{{{=E2=80=A6. ? (Unless they want to try to break the = parser/compiler.) So a sane limit is more than enough, just to guard = against weird source files that makes the parser (erroneously) generate = very very tall trees. Thank you, this is good to hear. (Standard minimum limits for languages = such as C are quite low; for example see C99 section 5.2.4.1.) What was the reason for the crash that prompted this bug report? Was it = an 'unreasonable' C source file, a grammar mistake (using left recursion = where right recursion should have been used, or vice versa), or = something else? I hope that tree-sitter does not require a deep stack to handle C files = that are merely very long or has long functions, initialisers etc; this = is common for program-generated source code.