bug#71709: Fix recent change in tramp-sh-handle-make-process

[Iurie Marian <marian.iurie@gmail.com>]

Unfortunately, the patch doesn't help.
By the way, this is what I noticed:
* the issue seems to occur more often in a docker container
* over /ssh it is working well, or at least it never occurred
* the temporary buffers like ~/tmp/tramp.J0RZDc~ are actually created on remote
* after repetitive tests I noticed that it doesn't reproduce anymore
and I added a line to print the default-directory right before
`make-process` for stderr: ~lisp/net/tramp-sh.el:3057~
  - when it fails, the default-directory is on local host
  - when it succeeds - it's on remote (where I guess it finds that
temporary file)
* on emacs restart it starts reproducing again
* once it starts working, it never reproduces again until emacs restart

It looks like it has something to do with `stderr` process execution
environment.

On Sat, 22 Jun 2024 at 14:02, Michael Albinus <michael.albinus@gmx.de> wrote:
>
> Michael Albinus <michael.albinus@gmx.de> writes:
>
> Hi Iurie,
>
> > Thanks for the recipe. I've played with it. Most cases, it works as
> > expected, but sometimes I see a similar error. Looks like a race
> > condition. I'll debug further.
>
> Well, I've found something suspicious in the code. Could you, pls, apply
> the appended patch to tramp.el in your Emacs Lisp directory? Since it
> changes a macro, you must remove all tramp*.elc files, and run 'make'
> afzerwards.
>
> >> Kind Regards,
> >> Iurie
>
> Best regards, Michael.
>