From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16394 invoked by alias); 17 Sep 2014 16:56:42 -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 16343 invoked by uid 48); 17 Sep 2014 16:56:38 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/61951] -Wextra switch produce warning: parameter 'ptr' set but not used [-Wunused-but-set-parameter] Date: Wed, 17 Sep 2014 16:56:00 -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: 4.8.1 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW 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: cc 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: 2014-09/txt/msg01776.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61951 Jakub Jelinek changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #2 from Jakub Jelinek --- Is there anything wrong on the warning though? [](Base* ptr){ ptr = new Deliv(); } I think ptr here is lambda parameter, does it behave any different from parameter to any other function? void foo (Base* ptr) { ptr = new Deliv(); } warns about parameter 'ptr' set but not used intentionally, so why shouldn't it we warn about it in the lambda? Doesn't the lambda just leak memory and not actually store the pointer anywhere (it stores it into the parameter which is never used)?