From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 351C5385840D; Tue, 9 Apr 2024 11:06:31 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 351C5385840D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1712660791; bh=BNT58SWPNN4vOiyc9djW8sqgrW0sPdZWG7m43PHAreI=; h=From:To:Subject:Date:In-Reply-To:References:From; b=TYaciizG0/KFN9YsBJZzF7MnvpsL2oGYhZBiyoXARecf34a10r+sDZBSqjwpAo+tN MWOuB9Is3FOzWxyK6UsRSyMjMLBmz71SB7cb2svfYgcYzv2D/2gtrurITdVyQw+pjZ ZBqccW7vD//F1bgTbidXZKmG67FyxqYz7LZW6BHU= From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/52534] gcc doesn't detect incorrect expression in call to va_start Date: Tue, 09 Apr 2024 11:06:29 +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: 4.5.3 X-Bugzilla-Keywords: accepts-invalid X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D52534 --- Comment #5 from Jakub Jelinek --- Note, if we warn, we shouldn't warn for C23 or later, because one can pass anything there, like 3 arguments, or that (unsigned int)n_args, or just one, etc. And __builtin_va_start (ap, 0) is what is used regardless of the pass= ed argument in that case.=