From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#24449: Emacs 25.1 RC2: Byte compiler reports error in wrong place. Date: Fri, 16 Sep 2016 16:22:08 +0300 Message-ID: <83wpic3rpb.fsf@gnu.org> References: <20160916113124.GB3630@acm.fritz.box> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1474032227 21814 195.159.176.226 (16 Sep 2016 13:23:47 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 16 Sep 2016 13:23:47 +0000 (UTC) Cc: 24449@debbugs.gnu.org To: Alan Mackenzie Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Sep 16 15:23:37 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 1bkt6q-0002Og-V8 for geb-bug-gnu-emacs@m.gmane.org; Fri, 16 Sep 2016 15:23:17 +0200 Original-Received: from localhost ([::1]:40525 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bkt6o-0004SB-W7 for geb-bug-gnu-emacs@m.gmane.org; Fri, 16 Sep 2016 09:23:15 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44854) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bkt6i-0004S1-RU for bug-gnu-emacs@gnu.org; Fri, 16 Sep 2016 09:23:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bkt6c-0006jp-RP for bug-gnu-emacs@gnu.org; Fri, 16 Sep 2016 09:23:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:35149) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bkt6c-0006jf-Ne for bug-gnu-emacs@gnu.org; Fri, 16 Sep 2016 09:23:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bkt6c-000470-Fw for bug-gnu-emacs@gnu.org; Fri, 16 Sep 2016 09:23:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 16 Sep 2016 13:23:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 24449 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 24449-submit@debbugs.gnu.org id=B24449.147403215215755 (code B ref 24449); Fri, 16 Sep 2016 13:23:02 +0000 Original-Received: (at 24449) by debbugs.gnu.org; 16 Sep 2016 13:22:32 +0000 Original-Received: from localhost ([127.0.0.1]:32861 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bkt64-00045z-53 for submit@debbugs.gnu.org; Fri, 16 Sep 2016 09:22:32 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:53651) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bkt5y-00045i-H7 for 24449@debbugs.gnu.org; Fri, 16 Sep 2016 09:22:26 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bkt5o-00066C-FA for 24449@debbugs.gnu.org; Fri, 16 Sep 2016 09:22:17 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:57207) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bkt5o-000667-CV; Fri, 16 Sep 2016 09:22:12 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:4047 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1bkt5l-000317-HV; Fri, 16 Sep 2016 09:22:12 -0400 In-reply-to: <20160916113124.GB3630@acm.fritz.box> (message from Alan Mackenzie on Fri, 16 Sep 2016 11:31:25 +0000) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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:123382 Archived-At: > Date: Fri, 16 Sep 2016 11:31:25 +0000 > From: Alan Mackenzie > > $ emacs -Q -batch -f batch-byte-compile cc-engine.el > > . This outputs the following warning: > > In c-forward-decl-or-cast-1: > cc-engine.el:8105:22:Warning: reference to free variable `eq' > > . The use of `eq' on L8105 is entirely correct. The error is at L8636, > where the following appears: > > (and eq context nil > (match-beginning 1)) > > . Clearly parentheses around the `eq' form are missing. > > The compiler should have output its warning for L8636, not L8105. Did you look at how the byte compiler determines the line number it will include in the warning/error message? If you didn't, you should, because after you do, you will never again wonder why an incorrect line number is reported. In fact, now that I did look there, I'm surprised it reports a correct line number at all, let alone as often as it does. It's sheer luck.