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Date:      Wed, 9 May 2007 15:06:02 -0400
From:      Thomas Dickey <dickey@radix.net>
To:        freebsd-current@freebsd.org
Subject:   Re: yacc(1) causes a fault -- "fault VA = 0xa5a5a5b1"
Message-ID:  <20070509190602.GA647@saltmine.radix.net>
In-Reply-To: <20070509185324.GB30662@dan.emsphone.com>
References:  <20070509185905.GA29365@FreeBSD.czest.pl> <464213F4.5030704@samsco.org> <20070509185324.GB30662@dan.emsphone.com>

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On Wed, May 09, 2007 at 01:53:25PM -0500, Dan Nelson wrote:
> In the last episode (May 09), Scott Long said:
> >  Wojciech A. Koszek wrote:
> > > Hi,
> > > I have a file:
> > > 	http://people.freebsd.org/~wkoszek/traces/grammar.y
=2E..
> actually a "use-before-set".  I can get it to core on 6.x too by
> setting MALLOC_OPTIONS=3DJ.  valgrind (with MALLOC_OPTIONS=3Dj) says:

fwiw,
	http://invisible-island.net/byacc/

does not appear to exhibit this defect.
=20
> =3D=3D52609=3D=3D Conditional jump or move depends on uninitialised value=
(s)
> =3D=3D52609=3D=3D    at 0x8052B40: end_rule (reader.c:1260)
> =3D=3D52609=3D=3D    by 0x805393C: read_grammar (reader.c:1621)
> =3D=3D52609=3D=3D    by 0x80546C4: reader (reader.c:1926)
> =3D=3D52609=3D=3D    by 0x804C3DB: main (main.c:434)

--=20
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net

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