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#30964: python-mode failing "overlapping strings" assertion lately Date: Sat, 16 Jun 2018 13:55:49 -0700 Message-ID: <5481253d38230797b677df41cf507790.squirrel@dancol.org> References: <5c3e75f096fae419224804c590805b9c.squirrel@dancol.org> <874liqc7fd.fsf@gmail.com> <87muwd9ba1.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1529182450 23129 195.159.176.226 (16 Jun 2018 20:54:10 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 16 Jun 2018 20:54:10 +0000 (UTC) User-Agent: SquirrelMail/1.4.23 [SVN] Cc: =?UTF-8?Q?Cl=C3=83=C2=A9ment?= Pit-Claudel , Philipp Stephani , 30964@debbugs.gnu.org To: "Noam Postavsky" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Jun 16 22:54:05 2018 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 1fUICz-0005ud-AC for geb-bug-gnu-emacs@m.gmane.org; Sat, 16 Jun 2018 22:54:05 +0200 Original-Received: from localhost ([::1]:52840 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUIF3-0002MR-OM for geb-bug-gnu-emacs@m.gmane.org; Sat, 16 Jun 2018 16:56:16 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:56527) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fUIEu-0002MJ-Vd for bug-gnu-emacs@gnu.org; Sat, 16 Jun 2018 16:56:05 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fUIEs-0000GF-9y for bug-gnu-emacs@gnu.org; Sat, 16 Jun 2018 16:56:04 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:44236) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fUIEs-0000FQ-0T for bug-gnu-emacs@gnu.org; Sat, 16 Jun 2018 16:56:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1fUIEr-0008EX-Mu for bug-gnu-emacs@gnu.org; Sat, 16 Jun 2018 16:56:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Daniel Colascione" Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 16 Jun 2018 20:56:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 30964 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 30964-submit@debbugs.gnu.org id=B30964.152918255431635 (code B ref 30964); Sat, 16 Jun 2018 20:56:01 +0000 Original-Received: (at 30964) by debbugs.gnu.org; 16 Jun 2018 20:55:54 +0000 Original-Received: from localhost ([127.0.0.1]:52133 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fUIEk-0008EB-54 for submit@debbugs.gnu.org; Sat, 16 Jun 2018 16:55:54 -0400 Original-Received: from dancol.org ([96.126.100.184]:35436) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fUIEi-0008E4-Qh for 30964@debbugs.gnu.org; Sat, 16 Jun 2018 16:55:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=dancol.org; s=x; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:To:From:Subject:Date:References:In-Reply-To:Message-ID; bh=e69fw4mCTPujyXLv5nOxZSbcAmhECBrE3E0yVNRTmtg=; b=ct2CvQUhOrMbqWbteSzJBuV6LzekzCtKc+YPhRr/ObJi6thryT7BLiLNTvViZxazKsdbHjBvgWESAzav9gS+dDnUa+VIU0T/YyPJdXcuKvyf2HeD9uIX+xBNRfHEJG71Hb41gfCaN4mRzHXH8SXKKumuJwwUm1CC0MdvIquomhV9eOEH6PAJBWg0aWz93LWOC7IJvf7wY1UiYktF/zVxX0/s4G50zWXQv59CtVVuwiyPRAmrn59DHf8+3KKmcqjzEJIJgjKK2DNCzwC03NkmRsdKSWV/RP7U2OB0plbDqyP+DcXI0v5DMtA9LdZWz3IyEvt9o6815zT5fL4+xU2hQA==; Original-Received: from localhost ([127.0.0.1] helo=dancol.org) by dancol.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fUIEf-0003SF-Q1; Sat, 16 Jun 2018 13:55:49 -0700 Original-Received: from 127.0.0.1 (SquirrelMail authenticated user dancol) by dancol.org with HTTP; Sat, 16 Jun 2018 13:55:49 -0700 In-Reply-To: <87muwd9ba1.fsf@gmail.com> X-Priority: 3 (Normal) Importance: Normal 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:147538 Archived-At: So it turns out that it wasn't an off-by-one problem at all. Instead, python was using (re-search-forward (rx (syntax string-delimiter))), which was matching incorrectly because re-search-forward didn't update syntax as it matched. It didn't do that because regex matching in general wasn't reentrant, and it wasn't reentrant because regex bytecode programs are self-modifying. I checked in some work that makes regex searching update syntax as needed.