From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29816 invoked by alias); 12 Aug 2014 14:38:35 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 29549 invoked by uid 55); 12 Aug 2014 14:38:27 -0000 From: "joseph at codesourcery dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug preprocessor/58844] [4.8 Regression] ICE with invalid use of ## Date: Tue, 12 Aug 2014 14:38:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: preprocessor X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: ice-on-valid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: joseph at codesourcery dot com X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.8.3 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-08/txt/msg00776.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58844 --- Comment #13 from joseph at codesourcery dot com --- Also, in the case of just two consecutive ##, with a placemarker either side, I think however you read it the concatenations are currently valid and you end up with no preprocessing tokens in the expansion. #define m(a,b) a####b m(,)