python-bleach: Non-determistically FTBFS due to unreliable tests

[Logan Rosen]

Imported from Debian bug http://bugs.debian.org/798441:

Source: python-bleach
Version: 1.4-1
Severity: serious
Justification: fails to build from source
User: <email address hidden>
Usertags: ftbfs
X-Debbugs-Cc: <email address hidden>

Dear Maintainer,

python-bleach's testsuite can non-deterministically fail, causing the
package
to FTBFS:

  [..]
  nosetests3
  ...................F............................................................................................................
  ======================================================================
  FAIL: Make sure that applying the filter twice doesn't change
  anything.
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/nose/case.py", line 198, in
    runTest
      self.test(*self.arg)
    File "/tmp/buildd/python-bleach-1.4/bleach/tests/test_basics.py",
    line 156, in test_idempotent
      eq_(linked, bleach.linkify(linked))
  AssertionError: '<span>invalid &amp; </span> &lt; extra <a
  rel="nofollow" href="http://link.com">http://link.com</a><em></em>' !=
  '<span>invalid &amp; </span> &lt; extra <a href="http://link.com"
  rel="nofollow">http://link.com</a><em></em>'

  ----------------------------------------------------------------------
  Ran 128 tests in 1.007s

  FAILED (failures=1)
  debian/rules:13: recipe for target 'override_dh_auto_test' failed
  make[1]: *** [override_dh_auto_test] Error 1
  make[1]: Leaving directory '/tmp/buildd/python-bleach-1.4'
  debian/rules:6: recipe for target 'build' failed
  make: *** [build] Error 2
  dpkg-buildpackage: error: debian/rules build gave error exit status 2

  [..]

You can see demonstrate this by leaving this to run for a minute or so:

  $ while nosetests3 bleach.tests.test_basics:test_idempotent; do :;
  done

Curiously, I cannot reproduce when running the tests under Python 2.X
which may help track down the underlying issue.

The full build log is attached or can be viewed here:

    https://reproducible.debian.net/logs/unstable/amd64/python-bleach_1.4-1.build2.log.gz

Regards,

--
      ,''`.
     : :' : Chris Lamb
     `. `'` <email address hidden> / chris-lamb.co.uk
       `-

[Logan Rosen (logan)]

This bug was fixed in the package python-bleach - 1.4.2-1

---------------
python-bleach (1.4.2-1) unstable; urgency=low

  [ Per Andersson ]
  * Bump debhelper compat level to 9 (level 8 is required in Build-Depends).
  * Add extend-diff-ignore for egg.info in debian/source/options.
  * d/watch: Use github.com, githubredir is deprecated.
  * Use my @debian.org address.
  * Use HTTPS protocol for Homepage and Vcs-* fields.

  [ Christopher Baines ]
  * New upstream release.
    - Includes fix upstream fix for #798441 (Closes: #798441).
  * Up standards version to 3.9.6, no changes required.

 -- Per Andersson <email address hidden> Mon, 22 Feb 2016 20:38:36 +0100