bug#65590: 29.0.50; esh-var-test/interp-concat-cmd fails on macOS

[Stefan Kangas]

Jim Porter <jporterbugs@gmail.com> writes:

> Thanks for the logs. Could you try the attached patch to see if it
> improves things?

Thanks.  The tests do not seem to fail with that patch:

  GEN      lisp/eshell/esh-cmd-tests.log

I was seeing some intermittent deadlocks in esh-cmd-tests.el at first,
but not yet after I rebased your patch on top of the fixes you just
pushed to master.

So for now, your patch seems to improve things.  I'll report back if I
see the deadlocks again.