From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 03B923857C7F; Tue, 6 Apr 2021 06:59:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 03B923857C7F From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug lto/99898] Possible LTO object incompatibility on gcc-10 branch Date: Tue, 06 Apr 2021 06:59:03 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: lto X-Bugzilla-Version: 10.2.1 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: 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: Tue, 06 Apr 2021 06:59:04 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99898 --- Comment #4 from Richard Biener --- The LTO minor saw a bump around Sep 10 last year already so the object files must be younger or LTO should complain. The specific assert that triggers isn't a sign of format divergence (it wou= ld be a very odd one to trigger) but instead there's an unexpected out-of-band tree object in the stream. Can you maybe reproduce the issue without re-using old objects? I'm not aware of any specific change where we forgot the bumping but there = were a lot of changes and since we did already bump bumping again shouldn't cause any harm. Still I'd like to be sure we're not seeing a genuine streaming b= ug here.=