From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 14335 invoked by alias); 11 Sep 2012 16:09:57 -0000 Received: (qmail 14269 invoked by uid 22791); 11 Sep 2012 16:09:43 -0000 X-SWARE-Spam-Status: No, hits=-3.6 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 11 Sep 2012 16:09:11 +0000 From: "jens.gustedt at loria dot fr" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/54552] New: Cast to pointer to VLA crash the compiler Date: Tue, 11 Sep 2012 16:09:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jens.gustedt at loria dot fr X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 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 X-SW-Source: 2012-09/txt/msg00876.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54552 Bug #: 54552 Summary: Cast to pointer to VLA crash the compiler Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned@gcc.gnu.org ReportedBy: jens.gustedt@loria.fr Created attachment 28172 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28172 code to reproduce the problem I stumbled int to a case where a cast (double(*)[n]) crashes the compiler, whereas first having a typedef for the VLA works ok. I attach code that reproduces the problem for me. The bug is present as well in gcc 4.6.3 as in 4.7.0. This is on an ubuntu x86_64, but I don't think that this should matter. Jens