bug#65324: "make check" hangs on NetBSD 9.3

[Bruno Haible]

Michael Albinus wrote:
> In order to reduce test time, what happens if you call
> 
> --8<---------------cut here---------------start------------->8---
> # make -C test tramp-tests SELECTOR=tramp-test41-special-characters
> --8<---------------cut here---------------end--------------->8---

Run as a normal user (not root):

$ gmake -C test tramp-tests SELECTOR=tramp-test41-special-characters
gmake: Entering directory '/home/bruno/emacs/build/test'
gmake[1]: Entering directory '/home/bruno/emacs/build/test'
../../build-aux/install-sh -c -d lisp/net/
HOME=/nonexistent LANG=C EMACS_TEST_DIRECTORY=/home/bruno/emacs/test   
"../src/emacs"  --no-init-file --no-site-file --no-site-lisp -L ":../../test"  \
  -l ert  -l lisp/net/tramp-tests.el \
  --batch --eval '(ert-run-tests-batch-and-exit (quote 
tramp-test41-special-characters))' 
Running 1 tests (2023-09-04 12:36:53+0200, selector 
`tramp-test41-special-characters')
Test tramp-test41-special-characters backtrace:
  (tramp-test-instrument-test-case 10 (setq tramp-debug-to-file t) (le
  (closure (tramp-use-connection-share tramp-inline-compress-start-siz
  ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test
  ert-run-test(#s(ert-test :name tramp-test41-special-characters :docu
  ert-run-or-rerun-test(#s(ert--stats :selector tramp-test41-special-c
  ert-run-tests(tramp-test41-special-characters #f(compiled-function (
  ert-run-tests-batch(tramp-test41-special-characters)
  ert-run-tests-batch-and-exit(tramp-test41-special-characters)
  eval((ert-run-tests-batch-and-exit 'tramp-test41-special-characters)
  command-line-1(("-L" ":../../test" "-l" "ert" "-l" "lisp/net/tramp-t
  command-line()
  normal-top-level()
Test tramp-test41-special-characters condition:
    (void-function tramp-test-instrument-test-case)
   FAILED  1/1  tramp-test41-special-characters (0.000283 sec) at 
../../test/lisp/net/tramp-tests.el:7408

Ran 1 tests, 0 results as expected, 1 unexpected (2023-09-04 12:36:53+0200, 
0.048956 sec)

1 unexpected results:
   FAILED  tramp-test41-special-characters

gmake[1]: *** [Makefile:181: lisp/net/tramp-tests.log] Error 1
gmake[1]: Leaving directory '/home/bruno/emacs/build/test'
gmake: *** [Makefile:247: lisp/net/tramp-tests] Error 2
gmake: Leaving directory '/home/bruno/emacs/build/test'