From: Roman Perepelitsa <roman.perepelitsa@gmail.com>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: Eric Cook <llua@gmx.com>, zsh-users@zsh.org
Subject: Re: Bug/regression: tt(RANDOM) seed not updating when $RANDOM is used in a pipe
Date: Thu, 29 Jun 2023 16:56:01 +0200 [thread overview]
Message-ID: <CAN=4vMqjv_Y+Sg9hg_i3tC1XMp0ZLxLM8C=iYLkTsKriMEpuHg@mail.gmail.com> (raw)
In-Reply-To: <CAH+w=7YEgHWBroyBYOg5t7QcLpxsCmUU2f_04XPt2+sy+ayj2g@mail.gmail.com>
On Thu, Jun 29, 2023 at 7:43 AM Bart Schaefer <schaefer@brasslantern.com> wrote:
>
> On Wed, Jun 28, 2023 at 7:46 PM Eric Cook <llua@gmx.com> wrote:
> >
> > On 6/28/23 16:10, Jon Oster wrote:
> > > In 5.8.1, $RANDOM seems not to update its state when the command $RANDOM
> > > was used in is piped somewhere. For example:
> > >
> > > Is this considered a bug? Or is it intended behaviour?
> > >
> > > [1] https://sourceforge.net/p/zsh/code/ci/faf0035e532cde45528806e7a05ad28a0ab7c0fb/
> >
> > The LHS of the pipe should be a subshell, so the behavior is intentional.
>
> This was, however, an unanticipated side-effect of the referenced
> commit. It changed behavior (that, before, did not conform to the
> documentation) without that fact being called out in any of our files
> that serve as release notes.
>
> It opens the question of whether anything else that previously was
> "pre-fork" might have changed behavior at that point.
Perhaps things of this sort?
% echo ${foo::=bar} | cat
% zmodload zsh/system; echo $sysparams[pid] | cat
I cannot reproduce the 5.4.2 behavior reported by Jon, so I cannot
verify whether the identified commit affects these test cases.
% docker run --rm zshusers/zsh:5.4.2 zsh -c 'repeat 2 echo $RANDOM | cat'
15988
9706
Roman.
next prev parent reply other threads:[~2023-06-29 14:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-28 20:10 Jon Oster
2023-06-29 2:46 ` Eric Cook
2023-06-29 5:42 ` Bart Schaefer
2023-06-29 14:41 ` Ray Andrews
2023-06-29 14:56 ` Roman Perepelitsa [this message]
2023-06-29 17:53 ` Mikael Magnusson
2023-06-29 18:15 ` Roman Perepelitsa
2023-06-29 23:41 ` Bart Schaefer
2023-07-02 7:17 ` Mikael Magnusson
2023-07-02 7:29 ` Roman Perepelitsa
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