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Subject: Re: 'Bad file descriptor: dup2( 1, 2 )' error on MacOS CI tasks
From: Daniel Gustafsson <daniel@yesql.se>
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 <CAOYmi+kuxWPBte3R3azvXg8K-tvEX1WNoYHt1+R9N8GWTAGkkA@mail.gmail.com>
Date: Wed, 1 Apr 2026 17:49:15 +0200
Cc: Andres Freund <andres@anarazel.de>,
 Nazir Bilal Yavuz <byavuz81@gmail.com>,
 PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
 Tom Lane <tgl@sss.pgh.pa.us>,
 Noah Misch <noah@leadboat.com>
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To: Jacob Champion <jacob.champion@enterprisedb.com>
Archived-At: 
 <https://www.postgresql.org/message-id/B9C7D975-8FD2-43AD-90DA-C83DD92AE6AC%40yesql.se>
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> On 1 Apr 2026, at 17:36, Jacob Champion =
<jacob.champion@enterprisedb.com> wrote:
>=20
> On Wed, Apr 1, 2026 at 6:58=E2=80=AFAM Andres Freund =
<andres@anarazel.de> wrote:
>> I'm afraid the guy maintaining both IPC::Run [1] and IO::Tty has gone =
all in on AI
>> authored code.  Both IPC::Run and IO::Tty have seen more merges in =
the last
>> week than in the 5 years before. Stuff getting merged left and right, =
with
>> failing tests to boot.
>>=20
>> If I wanted to do a supply chain attack on postgres, this would be =
the
>> way. Hijack IPC::Run, edit the commits locally on a committers =
machine before
>> push, to add a backdoor, celebrate.
>=20
> I did consider locking the exact version of IPC::Run during the NetBSD
> flake debacle [1], but abandoned it after the cross-platform pain... I
> believed signature verification was "good enough" at the time. Should
> we reconsider?

I think it makes sense to pin the versions of these modules, I =
personally have
them like that on my system to avoid surprises from package upgrades.

--
Daniel Gustafsson