bug#21669: 25.0.50; file-notify-tests failure on Fedora x86-64

[Paul Eggert <eggert@cs.ucla.edu>]

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On 10/13/2015 12:46 AM, Michael Albinus wrote:
>> Is that something you could do for me, by changing it in master?  To
>> >be honest I don't want to spend a lot of time worrying about this
>> >one....
> Done. Pls let us know, whether it solves the problem for you.
>
> Best regards, Michael.

Unfortunately it does not. Most of the time file-notify-tests succeeds, 
but it occasionally fails. I'm attaching a failure log, generated from 
commit 1e1a326c0f609f403c625bd9082e1099a4d9a52a and built with GCC 5.2 
on Fedora 21 x86-64 with './configure --enable-gcc-warnings'.

[-- Attachment #2: file-notify-tests.log --]
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Running 12 tests (2015-10-16 13:14:40-0700)
Local library: `inotify'
   passed   1/12  file-notify-test00-availability
Remote command: `gvfs-monitor-dir'
   passed   2/12  file-notify-test00-availability-remote
   passed   3/12  file-notify-test01-add-watch
   passed   4/12  file-notify-test01-add-watch-remote
   passed   5/12  file-notify-test02-events
Test file-notify-test02-events-remote backtrace:
  #[0 "\306\307\310C\307C\3111(\0\312\313\314\315\316\x06\b\x06\b\x06\b\x06\b$\317\"\32
  #[0 "\b\x19\303\304!\305\306\307C\306C\3101-\0\311\312\313\314\315\x06\b\x06\b\x06\b\x06
  ert--run-test-internal([cl-struct-ert--test-execution-info [cl-struc
  ert-run-test([cl-struct-ert-test file-notify-test02-events-remote "C
  ert-run-or-rerun-test([cl-struct-ert--stats t [[cl-struct-ert-test f
  ert-run-tests(t #[385 "\306\x02\307\"\203G\0\211\211G\310U\203\x14\0\211@\20
  ert-run-tests-batch(nil)
  ert-run-tests-batch-and-exit()
  command-line-1(("-L" ":." "-l" "ert" "-l" "file-notify-tests.elc" "-
  command-line()
  normal-top-level()
Test file-notify-test02-events-remote condition:
    (ert-test-failed
     ((should
       (equal '...
	(mapcar ... file-notify--test-events)))
      :form
      (equal
       (attribute-changed attribute-changed)
       nil)
      :value nil :explanation
      (different-types
       (attribute-changed attribute-changed)
       nil)))
   FAILED   6/12  file-notify-test02-events-remote
Reverting buffer `file-notify-test24487EdC'.
   passed   7/12  file-notify-test03-autorevert


Reverting buffer `file-notify-test24487RnI'.


   passed   8/12  file-notify-test03-autorevert-remote
   passed   9/12  file-notify-test04-file-validity
   passed  10/12  file-notify-test04-file-validity-remote
   passed  11/12  file-notify-test05-dir-validity
   passed  12/12  file-notify-test05-dir-validity-remote

Ran 12 tests, 11 results as expected, 1 unexpected (2015-10-16 13:15:30-0700)

1 unexpected results:
   FAILED  file-notify-test02-events-remote