From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Suspicious warning in W64 build Date: Fri, 15 Sep 2017 17:43:40 +0300 Message-ID: <83wp50koo3.fsf@gnu.org> References: <1017454172.910810.1504618695244@mail.libero.it> <83tw0ezgi1.fsf@gnu.org> <1146932094.13821.1504798935795@mail.libero.it> <83mv66z66p.fsf@gnu.org> <102a4c21-c275-c73e-ec53-0d85975dc968@cs.ucla.edu> <83a825znuf.fsf@gnu.org> <831snhzkgw.fsf@gnu.org> <837ex9x7vf.fsf@gnu.org> <83tw0cwcle.fsf@gnu.org> <83h8wcw3td.fsf@gnu.org> <83377vx3d0.fsf@gnu.org> <83ingnq01t.fsf@gnu.org> <83fubrpxsv.fsf@gnu.org> <83r2v9masw.fsf@gnu.org> <83d16smj5o.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1505486685 28973 195.159.176.226 (15 Sep 2017 14:44:45 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 15 Sep 2017 14:44:45 +0000 (UTC) Cc: rcopley@gmail.com, eggert@cs.ucla.edu, fabrice.popineau@centralesupelec.fr, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Sep 15 16:44:39 2017 Return-path: Envelope-to: ged-emacs-devel@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 1dsrrD-0007ME-9T for ged-emacs-devel@m.gmane.org; Fri, 15 Sep 2017 16:44:39 +0200 Original-Received: from localhost ([::1]:53660 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsrrK-0008GU-Fw for ged-emacs-devel@m.gmane.org; Fri, 15 Sep 2017 10:44:46 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37602) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsrqm-0007wO-SW for emacs-devel@gnu.org; Fri, 15 Sep 2017 10:44:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dsrqj-0006id-Q8 for emacs-devel@gnu.org; Fri, 15 Sep 2017 10:44:12 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:34551) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsrqj-0006iU-ND; Fri, 15 Sep 2017 10:44:09 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:3417 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1dsrqh-0001cD-F2; Fri, 15 Sep 2017 10:44:09 -0400 In-reply-to: <83d16smj5o.fsf@gnu.org> (message from Eli Zaretskii on Fri, 15 Sep 2017 11:59:47 +0300) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:218324 Archived-At: > Date: Fri, 15 Sep 2017 11:59:47 +0300 > From: Eli Zaretskii > Cc: fabrice.popineau@centralesupelec.fr, emacs-devel@gnu.org > > Some of the warnings are not Windows specific, so I'm CC'ing Paul. Here's one more: CC indent.o indent.c: In function 'scan_for_column': indent.c:69:10: warning: potential null pointer dereference [-Wnull-dereference] return 0; ^ indent.c:69:10: warning: potential null pointer dereference [-Wnull-dereference] indent.c:69:10: warning: potential null pointer dereference [-Wnull-dereference] indent.c:69:10: warning: potential null pointer dereference [-Wnull-dereference] I don't see how this could be anything but a GCC bug. Yes, buffer_display_table can return NULL, but every place that calls it makes sure the result is non-NULL before dereferencing it. Did I miss something?