René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Weird test errors on OSX","articleBody":"Last successful test run on OSX was: https://travis-ci.org/MacPython/matplotlib-wheels/builds/158635805, 4 months ago.\r\n\r\nErrors started 24 days ago, at https://travis-ci.org/MacPython/matplotlib-wheels/builds/181269028:\r\n\r\n```\r\n======================================================================\r\nERROR: Failure: RuntimeError ('list' must be None or a list, not \u003cclass 'str'\u003e)\r\n----------------------------------------------------------------------\r\nTraceback (most recent call last):\r\n  File \"/Users/travis/build/MacPython/matplotlib-wheels/venv/lib/python3.5/site-packages/nose/failure.py\", line 39, in runTest\r\n    raise self.exc_val.with_traceback(self.tb)\r\n  File \"/Users/travis/build/MacPython/matplotlib-wheels/venv/lib/python3.5/site-packages/nose/loader.py\", line 285, in generate\r\n    for test in g():\r\n  File \"/Users/travis/build/MacPython/matplotlib-wheels/venv/lib/python3.5/site-packages/matplotlib/testing/decorators.py\", line 216, in test\r\n    baseline_dir, result_dir = _image_directories(self._func)\r\n  File \"/Users/travis/build/MacPython/matplotlib-wheels/venv/lib/python3.5/site-packages/matplotlib/testing/decorators.py\", line 399, in _image_directories\r\n    mod_file = find_dotted_module(func.__module__)[1]\r\n  File \"/Users/travis/build/MacPython/matplotlib-wheels/venv/lib/python3.5/site-packages/matplotlib/testing/decorators.py\", line 389, in find_dotted_module\r\n    res = file, path, _ = imp.find_module(sub_mod, path)\r\n  File \"/Users/travis/build/MacPython/matplotlib-wheels/venv/lib/python3.5/imp.py\", line 270, in find_module\r\n    \"not {}\".format(type(name)))\r\nRuntimeError: 'list' must be None or a list, not \u003cclass 'str'\u003e\r\n```\r\n\r\nhttps://travis-ci.org/MacPython/matplotlib-wheels/jobs/181269039\r\n\r\nErrors on Python 3.4 and Python 3.5, but not 2.7.\r\n\r\nInvestigation by TC at the time at : https://gitter.im/matplotlib/matplotlib?at=58457e49b4ffd59e38ea84c8, further pointing to http://bugs.python.org/issue26844 , but this is a patch to fix the error message, to make it more informative.\r\n\r\nI couldn't reproduce the error on my local desktop, running OSX 10.11. \r\n\r\nThoughts:\r\n\r\n* travis recently replaced its OSX default runtime; need to replicate OSX / xcode version for last successful build, to see if it could be an infrastructure change;\r\n* investigate dependencies.  TC mentioned namespace packages - @tacaswell - was that from some further investigation you did?","author":{"url":"https://github.com/matthew-brett","@type":"Person","name":"matthew-brett"},"datePublished":"2016-12-29T13:39:27.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/2/matplotlib-wheels/issues/2"}