From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 5247E385801D; Sun, 28 Mar 2021 07:16:54 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 5247E385801D From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/99797] accessing uninitialized automatic variables Date: Sun, 28 Mar 2021 07:16:54 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 11.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: RESOLVED X-Bugzilla-Resolution: INVALID X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: 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 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 28 Mar 2021 07:16:54 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99797 --- Comment #5 from Andrew Pinski --- (In reply to Andrew Pinski from comment #4) > (In reply to Martin Uecker from comment #3) > > The C standard says (6.3.2.1p2) >=20 > J.2 Undefined behavior >=20 > =E2=80=94 The value of an object with automatic storage duration is used = while it is > indeterminate (6.2.4, 6.7.9, 6.8). 6.9p10 If an object that has automatic storage duration is not initialized explici= tly, its value is indeterminate. Is that enough?=