bug#71778: 30.0.60; Eshell hangs when switching buffers during output redirection

[Sean Devlin <spd@toadstyle.org>]

> On Jun 26, 2024, at 12:45 AM, Jim Porter <jporterbugs@gmail.com> wrote:
> 
> Version: 30.1
> 
> On 6/25/2024 1:50 PM, Sean Devlin wrote:
>> I've found it is possible to Eshell in the middle of a command. Here's a
>> recipe:
> [snip]
>> $ for x in 1 2 3 4 5 { echo hello ; sleep 2 } > #<buffer test>
>> 4. While the above command is running, C-x b test
>> 5. C-x b *eshell*
> 
> Tricky! But thankfully it was an easy fix. We just needed to make sure that when cleaning up in a timer after 'eshell-sentinel', we always do it from the Eshell buffer.
> 
> Fixed on both the master branch and the release branch, with a regression test.

Thanks, verified!