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Possible ZSH bug involving piping ls to less (MSYS2 & Cygwin)

X-seq: zsh-workers 47847
From: <agkozak@xxxxxxxxx>
To: <zsh-workers@xxxxxxx>
Subject: Possible ZSH bug involving piping ls to less (MSYS2 & Cygwin)
Date: Mon, 18 Jan 2021 11:08:27 -0800
Archived-at: <https://zsh.org/workers/47847>
Archived-at: <http://www.zsh.org/sympa/arcsearch_id/zsh-workers/2021-01/013001d6edcd%244dd2d670%24e9788350%24%40gmail.com>
List-id: <zsh-workers.zsh.org>
Thread-index: AdbtyMmbTHQE0GwzTQaG7OWhpqmtEw==

Using zsh v5.8 on both MSYS2 and Cygwin and a plain vanilla shell (no
dotfiles):

If I run

    ls --color | less -R

frequently I get

    zsh: done                    ls --color |
    zsh: suspended (tty output)  less -R

On rare occasions I can get this to happen with a simple

    ls | less

but using the --color option seems to make it happen considerably more
often. It happens quite frequently on MSYS2; it is harder to reproduce on
Cygwin, but it does happen. This problem doesn't happen in bash. I don't
know the origin of the problem, but I suspect list members will have
insight.

Alex

Follow-Ups:
- Re: Possible ZSH bug involving piping ls to less (MSYS2 & Cygwin)
  - From: Jun T

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