Hang in make check

[Jeffrey Walton]

Hi Everyone,

I'm testing Emacs 27.2 on both Linux and Apple. 'make check' is
hanging somewhere around this test:

HOME=/nonexistent EMACSLOADPATH= LC_ALL=C
EMACS_TEST_DIRECTORY=/home/jwalton/Build-Scripts/emacs-27.2/test
"../src/emacs"  --no-init-file --no-site-file --no-site-lisp -L ":."
\
  -l ert  -l lisp/autorevert-tests \
  --batch --eval '(ert-run-tests-batch-and-exit (quote (not (or (tag
:expensive-test) (tag :unstable)))))' > lisp/autorevert-tests.log 2>&1
|| { STAT=$?; cat lisp/autorevert-tests.log; exit $STAT; }
<hang here>

CTRL+C is needed to break into the test.

Jeff