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Date:      Wed, 31 Mar 2021 18:49:55 -0400
From:      Thomas Dickey <dickey@his.com>
To:        Juraj Lutter <otis@FreeBSD.org>
Cc:        Henric Jungheim <software@henric.org>, Thomas Dickey <dickey@his.com>, FreeBSD-current@freebsd.org
Subject:   Re: 13.0-RC3 bison causes tputs SIGSEGV
Message-ID:  <20210331224955.GA8387@prl-debianold-64.jexium-island.net>
In-Reply-To: <7E5FFF68-3FDC-42C4-A1C9-4B2F483FABC5@FreeBSD.org>
References:  <YGImt%2BhzWnQTUjz/@mail.henric.info> <20210329233138.GA4334@prl-debianold-64.jexium-island.net> <33EE2402-4447-4168-AB5B-D98009CD03AA@FreeBSD.org> <20210331004803.GA1607@prl-debianold-64.jexium-island.net> <YGR%2B1yOzagxgvpqk@mail.henric.info> <7E5FFF68-3FDC-42C4-A1C9-4B2F483FABC5@FreeBSD.org>

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On Wed, Mar 31, 2021 at 09:40:49PM +0200, Juraj Lutter wrote:
>=20
> > On 31 Mar 2021, at 15:53, Henric Jungheim <software@henric.org> wrote:
> >=20
> >>=20
> >> Knowing that would help me see whether the problem is faulty initializ=
ation
> >> from libtextstyle (i.e., the SCREEN pointer is null, making the path v=
ia
> >> the static structure), or some ifdef-combination in ncurses that I've
> >> neglected (i.e., a flaw in the pointer juggling).
>=20
> I=E2=80=99ve observed that the application in question calls:
>=20
>   /* Create the output styled stream.  */
>   pk_ostream =3D
>     (color_mode =3D=3D color_html
>      ? html_styled_ostream_create (file_ostream_create (stdout),
>                                    style_file_name)
>      : styled_ostream_create (STDOUT_FILENO, "(stdout)",
>                               TTYCTL_AUTO, style_file_name));
>=20
> Does it make any difference?

I don't know yet.  I've been setting up a build for bison+libtextstyle
so that I can study it firsthand (and use valgrind, etc., to look for
problems).

That chunk is just the initialization, while the problem appears later.

--=20
Thomas E. Dickey <dickey@invisible-island.net>
https://invisible-island.net
ftp://ftp.invisible-island.net

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