From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Yoichi Nakayama Newsgroups: gmane.emacs.bugs Subject: bug#61000: emacs-28.2 hangs on displaying ill-formed python source Date: Sun, 22 Jan 2023 16:21:02 +0900 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="4625"; mail-complaints-to="usenet@ciao.gmane.io" To: 61000@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Jan 22 08:22:26 2023 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 1pJUgL-000104-Gi for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 22 Jan 2023 08:22:25 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pJUg0-0007SF-F1; 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Sat, 21 Jan 2023 23:21:13 -0800 (PST) Received-SPF: pass client-ip=2607:f8b0:4864:20::631; envelope-from=yoichi.nakayama@gmail.com; helo=mail-pl1-x631.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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:253908 Archived-At: Hi, I found Emacs-28.2 becomes inoperable (hangs at 100% CPU usage) when displaying certain ill-formed Python source code. How to reproduce: (1) prepare python source file https://raw.githubusercontent.com/sqlfluff/sqlfluff/6071b70ef6a46b19141495ee8d38b41b27750b2c/src/sqlfluff/dialects/dialect_snowflake.py (2) open it by "emacs -Q dialect_snowflake.py" (3) jump to line 767 by "M-g g 767 RET". (4) remove closing triple quotes by "C-k" class FunctionNameSegment(ansi.FunctionNameSegment): """Function name, including any prefix bits, e.g. project or schema. Overriding FunctionNameSegment to support Snowflake's IDENTIFIER pseudo-function. """ <== remove this triple quote I also verified the following: * The problem doesn't occur with Emacs-28.1 * The problem doesn't occur when I load lisp/progmode/python.el before 1b77362 between step (2) and (3). https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=1b7736277114bf91012b817a4e2557625b7340a5 > commit 1b7736277114bf91012b817a4e2557625b7340a5 > Author: Lars Ingebrigtsen > Date: Mon Apr 18 13:17:32 2022 +0200 > > Avoid hangs in python-mode with debug-on-error set > > * lisp/progmodes/python.el (python-nav-end-of-statement): Avoid > using cl-assert here, because this is called from the font-lock > machinery, and if debug-on-error is set here, we'll hang Emacs > (bug#54996). > > Do not merge to master. Thanks, -- Yoichi NAKAYAMA