From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 49FFA3858C78; Wed,  6 Sep 2023 21:37:07 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 49FFA3858C78
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1694036227;
	bh=pvv/5QOC15zlxLXDtTjZZ+XgSonElpUhMNw4A1akAmQ=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=AUTjH0Ytn35OBMYCqx4Y/74JVVCwYkQbJj2EBgCGrolo4pWxpjZChD2mwe6ZETgXm
	 vAZTeqmt0bUeuFGeg8Fbx+E7mHkddJIM1y66YWUF08kLPB08W769ry5q3QlNWYhzsM
	 p57lHY+saK3N7U+Ppl01vVF5NSxdURrpoU2kQsYU=
From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug analyzer/110520] -Wanalyzer-null-dereference false nagetive
 with `*ptr = 10086`
Date: Wed, 06 Sep 2023 21:37:07 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: analyzer
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: dmalcolm at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: dmalcolm at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: everconfirmed bug_status cf_reconfirmed_on
Message-ID: <bug-110520-4-7icjw5twMj@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-110520-4@http.gcc.gnu.org/bugzilla/>
References: <bug-110520-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110520

David Malcolm <dmalcolm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2023-09-06

--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Thanks for filing this bug.

With trunk (for gcc 14) I correctly get a NPD warning (true positive):
  https://godbolt.org/z/a5h38cz7d

With gcc 13.2, I don't (false negative):
  https://godbolt.org/z/PKnToYK8v

I've been rewriting C string handling for gcc 14, so it's likely this now
working is a side-effect of that.

Keeping open to track adding a regression test for this.=