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Re: 'while do done' hangs interactive zsh

X-seq: zsh-workers 48834
From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
To: Arseny Maslennikov <ar@xxxxxxxxx>
Cc: Zsh hackers list <zsh-workers@xxxxxxx>
Subject: Re: 'while do done' hangs interactive zsh
Date: Sun, 16 May 2021 07:28:42 -0700
Archived-at: <https://zsh.org/workers/48834>
In-reply-to: <YKDi6GYtnBt1ZYTU@cello>
List-id: <zsh-workers.zsh.org>
References: <YKDi6GYtnBt1ZYTU@cello>

On Sun, May 16, 2021 at 2:17 AM Arseny Maslennikov <ar@xxxxxxxxx> wrote:
>
> When zsh tries to execute "while do; done", it enters a busy loop:

I can reproduce this, and it is not dependent on the shortloops option.

> Even more, if the user enters "while do; done" in an interactive zsh
> instance, the busy loop is not interruptible by ^C, ^\ or ^Z; the shell
> has to be killed via some external means.

I can NOT reproduce this in the latest revision from git, but I can
reproduce it in zsh-5.8.

Follow-Ups:
- Re: 'while do done' hangs interactive zsh
  - From: Bart Schaefer

References:
- 'while do done' hangs interactive zsh
  - From: Arseny Maslennikov

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