From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Daniel Colascione Newsgroups: gmane.emacs.bugs Subject: bug#24905: 25.1.50; Lock-up in python-mode Date: Tue, 08 Nov 2016 15:34:09 -0800 Message-ID: References: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1478648140 5630 195.159.176.226 (8 Nov 2016 23:35:40 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 8 Nov 2016 23:35:40 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) Cc: 24905-done@debbugs.gnu.org To: Philipp Stephani Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Nov 09 00:35:36 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c4Fv6-0006Zw-TQ for geb-bug-gnu-emacs@m.gmane.org; Wed, 09 Nov 2016 00:35:13 +0100 Original-Received: from localhost ([::1]:36026 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c4Fv9-0007ci-So for geb-bug-gnu-emacs@m.gmane.org; Tue, 08 Nov 2016 18:35:15 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53276) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c4Fv1-0007a8-Th for bug-gnu-emacs@gnu.org; Tue, 08 Nov 2016 18:35:08 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c4Fux-0007TU-4q for bug-gnu-emacs@gnu.org; Tue, 08 Nov 2016 18:35:07 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:34743) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1c4Fuw-0007TN-TN for bug-gnu-emacs@gnu.org; Tue, 08 Nov 2016 18:35:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1c4Fuw-0007fL-O7 for bug-gnu-emacs@gnu.org; Tue, 08 Nov 2016 18:35:02 -0500 Resent-From: Daniel Colascione Original-Sender: "Debbugs-submit" Resent-To: bug-gnu-emacs@gnu.org Resent-Date: Tue, 08 Nov 2016 23:35:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: cc-closed 24905 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Mail-Followup-To: 24905@debbugs.gnu.org, dancol@dancol.org, p.stephani2@gmail.com Original-Received: via spool by 24905-done@debbugs.gnu.org id=D24905.147864805829402 (code D ref 24905); Tue, 08 Nov 2016 23:35:02 +0000 Original-Received: (at 24905-done) by debbugs.gnu.org; 8 Nov 2016 23:34:18 +0000 Original-Received: from localhost ([127.0.0.1]:50140 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c4FuE-0007eA-Mu for submit@debbugs.gnu.org; Tue, 08 Nov 2016 18:34:18 -0500 Original-Received: from dancol.org ([96.126.100.184]:36772) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c4FuD-0007e1-0x for 24905-done@debbugs.gnu.org; Tue, 08 Nov 2016 18:34:17 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=dancol.org; s=x; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date:References:Subject:Cc:To:From; bh=ChvU9ot8AfkzZQc+9UejmUF8SOfKuRS0ekoUcDYkBgU=; b=Jfyk5EvjGr05jI7Boqax8vQ0+9Yyu9IpN1bWROXgpXdHlfIvs7KB5V4FDfMXlua6KqcBB8YHflPo4hk4Vumf9HYS8fpNUILmSqipqkPSYKVRGY5uY0SFr4weKyOeRRjBt9TlF946YytBSjxZuck4FmkN/kedYZooWmNl97FLGrvhI2YseGNyPti4f3fXK+sDCPVHW4OmkAQ769YU3nGTSyHCAjKURkUvjA54w7FxE5GKKJwMcBSy5SAO6+xVh2LTSkyvjNXNY43vm70MnFCI8b5rEFO5Tdbowd26ZVvDsQHPohOa+Y6OH/6H1YI5f18jbHzHYRxKh4eWe8EEN5JhCw==; Original-Received: from [2620:0:1008:100b:50b8:10ae:93d5:4f46] (helo=dancol-glaptop0) by dancol.org with esmtpsa (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.84_2) (envelope-from ) id 1c4FuB-0002J2-Pe; Tue, 08 Nov 2016 15:34:15 -0800 In-Reply-To: (Daniel Colascione's message of "Tue, 08 Nov 2016 14:45:07 -0800") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:125500 Archived-At: Fixed in master and emacs-25. On Tue, Nov 08 2016, Daniel Colascione wrote: > On Tue, Nov 08 2016, Daniel Colascione wrote: >> On Tue, Nov 08 2016, Philipp Stephani wrote: >>> echo ' "' > /tmp/a.py >>> emacs -Q /tmp/a.py >>> >>> Emacs locks up immediately. >>> Given that this is so easy to trigger, it should block the 25.2 >>> release. >> >> Can repro. Thanks for coming up with a small testcase. > > FWIW, the Lisp traceback is this: > > "syntax-ppss" (0xffff2978) > "python-info-line-ends-backslash-p" (0xffff2e80) > "python-nav-beginning-of-statement" (0xffff3388) > "python-info-beginning-of-statement-p" (0xffff3840) > "python-info-beginning-of-block-p" (0xffff3d38) > "python-nav--forward-sexp" (0xffff43d8) > "python-nav-forward-sexp" (0xffff4918) > "python-nav-backward-sexp" (0xffff4e20) > "python-info-docstring-p" (0xffff5378) > "python-font-lock-syntactic-face-function" (0xffff5850) > "font-lock-fontify-syntactically-region" (0xffff5e00) > "font-lock-default-fontify-region" (0xffff6380) > "font-lock-fontify-region" (0xffff6858) > 0x1c27368 PVEC_COMPILED > "run-hook-wrapped" (0xffff6f30) > "jit-lock--run-functions" (0xffff74b0) > "jit-lock-fontify-now" (0xffff7b08) > "jit-lock-function" (0xffff80b8) > "redisplay_internal (C function)" (0x0) > > We're actually finishing GC, by the way: this isn't a problem with > the alloc.c guts, fortunately. We're just generating tons of > garbage. I've seen infloops in python.el's syntactic analysis > before. This one looks worse than usual because it happens in redisplay. > > (Maybe redisplay should impose time limits on lisp that it runs?)