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Date: Mon, 15 Jul 2013 21:14:31 +0200
Reply-To: mpy@gmx.net
From: "Manuel Presnitz" <mpy@gmx.net>
To: zsh-workers@zsh.org
Subject: Re[2]: bug with eval, proc-subst and pipes
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SC> NOK$ eval 'paste <(echo 1) <(echo 2) <(echo 3) <(echo 4)' | cat
SC> paste: /proc/self/fd/13: No such file or directory
SC> Reproduced with Zsh 5.0.2 on Debian amd64 on two different
SC> machines, not with 4.3.17 on Ubuntu 12.04 amd64

BS> It's a race condition of some kind.  I can reproduce reliably with
BS> 
BS> % (){ sleep 5; paste "$@" } <(echo 1)
BS> 
BS> even without an "eval".

I don't know if it helps to get an idea what's going on, but
both variants work as expected with zsh 5.0.2 under the cygwin
environment:

$ uname -smo  
CYGWIN_NT-6.1-WOW64 i686 Cygwin
$ mkdir /tmp/empty
$ ZDOTDIR=/tmp/empty zsh -f
$ autoload compinit
$ compinit
$ eval 'paste <(echo 1) <(echo 2) <(echo 3) <(echo 4)' | cat
1       2       3       4
$ (){ sleep 5; paste "$@" } <(echo 1)
1
$ print $ZSH_VERSION $ZSH_PATCHLEVEL 
5.0.2 1.5778


Regards,
Manuel.