From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-421035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 30042 invoked by alias); 26 Apr 2013 14:23:30 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 30012 invoked by uid 48); 26 Apr 2013 14:23:27 -0000
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/56958] Spurious set but not used variable warning in empty pack expansion
Date: Fri, 26 Apr 2013 14:23:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-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-Changed-Fields:
Message-ID: <bug-56958-4-hxPs2Rdl8X@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-56958-4@http.gcc.gnu.org/bugzilla/>
References: <bug-56958-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
X-SW-Source: 2013-04/txt/msg02180.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56958

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-04-26 14:23:27 UTC ---
Well, you aren't using spurious, are you?  Because t + spurious... expands to
nothing.

If mark_exp_read isn't called while processing_template_decl because the
expression is type dependent, and during instantiation is lost altogether, not
sure where could we call mark_rvalue_use etc.