bug#56025: 29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin

[Sean Whitton]

Hello,

On Thu 23 Jun 2022 at 09:18pm -04, Ken Brown wrote:

> diff --git a/lisp/eshell/esh-io.el b/lisp/eshell/esh-io.el
> index 3644c1a18b..1c4131cb07 100644
> --- a/lisp/eshell/esh-io.el
> +++ b/lisp/eshell/esh-io.el
> @@ -276,8 +276,8 @@ eshell-close-target
>      ;; If we're redirecting to a process (via a pipe, or process
>      ;; redirection), send it EOF so that it knows we're finished.
>      ((eshell-processp target)
> -    (if (eq (process-status target) 'run)
> -       (process-send-eof target)))
> +    (while (eq (process-status target) 'run)
> +      (process-send-eof target)))
>
>      ;; A plain function redirection needs no additional arguments
>      ;; passed.
>
> I'm about to go AFK for a few days.  If the eshell people agree that something
> like this patch should be installed, please go ahead.  I think it would then 
> be
> worth re-enabling the extpipe tests on EMBA to see if the problem is fixed 
> there
> too.

I'm a bit queasy about an unbounded loop here.  Why not just try three
times?  Or, better, try twice, and a third time only if we're on a
platform where we know it's needed.

Many thanks for the investigative work.

-- 
Sean Whitton