Feedback-ID: id4a34324:Fastmail
Date: Wed, 1 Apr 2026 10:49:28 -0400
From: Andres Freund <andres@anarazel.de>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Nazir Bilal Yavuz <byavuz81@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
 Noah Misch <noah@leadboat.com>
Subject: Re: 'Bad file descriptor: dup2( 1, 2 )' error on MacOS CI tasks
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Hi,

On 2026-04-01 10:26:54 -0400, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
> > On 2026-04-01 16:28:21 +0300, Nazir Bilal Yavuz wrote:
> >> My current hypothesis is that all of these three tests use 'IO::Pty'.
> >> On MacOS CI, we install this via MacPorts using the 'p5.34-io-tty'
> >> package [2], which was updated about 2.5 days ago. I am not sure if is
> >> relevant but it has a known issue on Darwin [3]:
> 
> > This presumably means that every macports user (e.g. Tom), will see this as
> > well after installing the latest updates.
> 
> There must be some other factor involved.  indri has been using
> p5.34-io-tty since I last did "port update" there, which looks
> to have been 22 March.  And it's not failing.  My laptop is
> also okay with these tests, and it likewise has
> 
> $ port installed | grep io-.ty
>   p5.34-io-tty @1.200.0_0 (active)

I think that means you have the old version. The new, broken, version appears
to be p5.34-io-tty @ 1.240.0

The problematic version was just released two days ago, so if you last did a
port update on the 22nd, it'd make sense that you don't have the problematic
version yet.

The macports change was:
https://github.com/macports/macports-ports/commit/7aafb014a1204e7bef28d5ec5b907bd2b0dee018

Greetings,

Andres Freund