From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id BA27D3858C66; Tue, 14 Mar 2023 20:11:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BA27D3858C66 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1678824663; bh=KaxjW1zv+21g2k+TzIR10UlgZKlWLmEcBFW9eyzY4Vs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=nRJErRC6gT5SpiXx7BdrgFpRIUKD4oMERAeOV/bb6bPQKkuVIKAuNTp8GYt2dx0Fk Ep6LMjOAi9s0GmySOPLRknc4IhvyJoykMigKdHu1rmXdvb5KFUwjibL/y0op62fl2s Qj/kPbaPvPaX8JOKpcmmZ6jHQ2NPo0jszS1UD2iU= From: "jason at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/109065] [11/12/13 Regression] Type alias combination erroneously fails with "incomplete type" Date: Tue, 14 Mar 2023 20:11:03 +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: 11.1.0 X-Bugzilla-Keywords: rejects-valid X-Bugzilla-Severity: normal X-Bugzilla-Who: jason at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: jason at gcc dot gnu.org X-Bugzilla-Target-Milestone: 11.4 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=3D109065 --- Comment #4 from Jason Merrill --- The problem is that r11-5825 assumes that if a type is dependent, its TYPE_MAIN_VARIANT and TYPE_CANONICAL are also dependent, which is not universally true: DataAlias is dependent, so that any errors from substituting into the template-id are caught; but its TYPE_MAIN_VARIANT and TYPE_CANONICAL are int, which is not.=