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Date: Mon, 21 Sep 2015 22:04:13 +0200
From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: Peter Stephenson <p.w.stephenson@ntlworld.com>
Cc: zsh-workers@zsh.org
Subject: Re: Two issues found with -fsanitize=undefined
Message-ID: <20150921200413.GA8913@x4>
References: <20150917075759.GA24365@x4>
 <20150921201306.0017146b@ntlworld.com>
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In-Reply-To: <20150921201306.0017146b@ntlworld.com>

On 2015.09.21 at 20:13 +0100, Peter Stephenson wrote:
> On Thu, 17 Sep 2015 09:57:59 +0200
> Markus Trippelsdorf <markus@trippelsdorf.de> wrote:
> > 2)
> >  compmatch.c:341:6: runtime error: null pointer passed as argument 2, which is declared to never be null}
> > Test ./Y02compmatch.ztst failed: output differs from expected as shown above for:
> 
> This might be benign, if the final argument is also zero; this should
> tell us.

Yes:
matchbuflen: (null) with no matchbuf: 0

It looks like the issue doesn't happen with a -DDEBUG build.
I've changed the DPUTS line to:
 fprintf(stderr, "matchbuflen: %s with no matchbuf: %x", matchbuf, matchbuflen);

-- 
Markus