remove_stale_bytecode stops test run, if unlink fails

[Michael Howitz]

When trying to remove stale bytecode files the developer is not allowed to the test run stops with the following traceback.

Removing stale bytecode file /home/zope/local/lib/python2.4/site-packages.org/_xmlplus/FtCore.pyc
Traceback (most recent call last):
...
  File ".../zope/testing/testrunner.py", line 932, in run
    failed = not run_with_options(options)
  File ".../zope/testing/testrunner.py", line 1038, in run_with_options
    remove_stale_bytecode(options)
  File ".../zope/testing/testrunner.py", line 1812, in remove_stale_bytecode
    os.unlink(fullname)
OSError: [Errno 13] Permission denied: '/home/zope/local/lib/python2.4/site-packages.org/_xmlplus/FtCore.pyc'

It would be helpful to have an option to produce a warning instead.

[Marius Gedminas (mgedmin)]

This needs to be fixed in zope.testrunner, not zope.testing.

[Colin Watson (cjwatson)]

The zope.testrunner project on Launchpad has been archived at the request of the Zope developers (see https://answers.launchpad.net/launchpad/+question/683589 and https://answers.launchpad.net/launchpad/+question/685285). If this bug is still relevant, please refile it at https://github.com/zopefoundation/zope.testrunner.