From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-35792-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 4581 invoked by alias); 14 Jul 2015 08:50:28 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
X-Seq: 35792
Received: (qmail 25381 invoked from network); 14 Jul 2015 08:50:25 -0000
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW,
	SPF_HELO_PASS,UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.0
X-Injected-Via-Gmane: http://gmane.org/
To: zsh-workers@zsh.org
From: =?utf-8?b?xLBzbWFpbA==?= =?utf-8?b?RMO2bm1leg==?= <ismail@donmez.ws>
Subject: Undefined behaviour warnings with zsh.git and clang
Date: Tue, 14 Jul 2015 08:48:17 +0000 (UTC)
Message-ID: <loom.20150714T104717-624@post.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Complaints-To: usenet@ger.gmane.org
X-Gmane-NNTP-Posting-Host: sea.gmane.org
User-Agent: Loom/3.14 (http://gmane.org/)
X-Loom-IP: 213.14.100.128 (Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2453.0 Safari/537.36)

Hi,

With git master I started to see:

clang -c -I. -I../Src -I../Src -I../Src/Zle -I.  -DHAVE_CONFIG_H -O2 -fPIE -
fstack-protector -I/usr/include/ncurses6/ncursesw -I/usr/include/ncurses6  -
o params.o params.c
params.c:1721:18: warning: shifting a negative signed value is undefined [-
Wshift-negative-value]
            v->isarr |= SCANPM_ISVAR_AT;
                        ^~~~~~~~~~~~~~~
./zsh.h:1755:32: note: expanded from macro 'SCANPM_ISVAR_AT'
#define SCANPM_ISVAR_AT   ((-1)<<15)    /* "$foo[@]"-style substitution
                           ~~~~^
params.c:1933:36: warning: shifting a negative signed value is undefined [-
Wshift-negative-value]
            v->isarr = flags | (isvarat ? SCANPM_ISVAR_AT : 0);
                                          ^~~~~~~~~~~~~~~
./zsh.h:1755:32: note: expanded from macro 'SCANPM_ISVAR_AT'
#define SCANPM_ISVAR_AT   ((-1)<<15)    /* "$foo[@]"-style substitution
                           ~~~~^
2 warnings generated.

make test is fine but the warning might be worth looking into.