René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"test_transparent_markers[pdf] is broken on v3.3.x Travis macOS","articleBody":"### Bug report\r\n\r\n**Bug summary**\r\n\r\nStarting with #18545 and the subsequent merge, `test_transparent_markers[pdf]` has been failing on v3.3.x for Travis macOS. It does not appear to be failing on other systems or other branches. There were no other builds on that branch for 5 days before that, so it may or may not be related to that PR specifically.\r\n\r\nI could not reproduce on the Mac Mini either, so I'm not sure how to fix it.\r\n\r\n**Actual outcome**\r\n\r\n```\r\n________________________ test_transparent_markers[pdf] _________________________\r\n[gw0] darwin -- Python 3.8.5 /usr/local/opt/python@3.8/bin/python3.8\r\nexpected = '/Users/travis/build/matplotlib/matplotlib/result_images/test_axes/transparent_markers-expected.pdf'\r\nactual = PosixPath('/Users/travis/build/matplotlib/matplotlib/result_images/test_axes/transparent_markers.pdf')\r\ntol = 0\r\n    def _raise_on_image_difference(expected, actual, tol):\r\n        __tracebackhide__ = True\r\n    \r\n        err = compare_images(expected, actual, tol, in_decorator=True)\r\n        if err:\r\n            for key in [\"actual\", \"expected\", \"diff\"]:\r\n                err[key] = os.path.relpath(err[key])\r\n\u003e           raise ImageComparisonFailure(\r\n                ('images not close (RMS %(rms).3f):'\r\n                    '\\n\\t%(actual)s\\n\\t%(expected)s\\n\\t%(diff)s') % err)\r\nE           matplotlib.testing.exceptions.ImageComparisonFailure: images not close (RMS 4.572):\r\nE           \tresult_images/test_axes/transparent_markers_pdf.png\r\nE           \tresult_images/test_axes/transparent_markers-expected_pdf.png\r\nE           \tresult_images/test_axes/transparent_markers_pdf-failed-diff.png\r\nlib/matplotlib/testing/decorators.py:139: ImageComparisonFailure\r\n\r\n------------------------------ Captured log call -------------------------------\r\nDEBUG    matplotlib.axes._base:_base.py:2613 title position was updated manually, not adjusting\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'IHDR' 16 13\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'iCCP' 41 2354\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:351 iCCP profile name b'default_rgb.icc'\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:352 Compression method 0\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'pHYs' 2407 9\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'tEXt' 2428 31\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'IDAT' 2471 8192\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'IHDR' 16 13\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'iCCP' 41 2354\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:351 iCCP profile name b'default_rgb.icc'\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:352 Compression method 0\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'pHYs' 2407 9\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'tEXt' 2428 31\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'IDAT' 2471 8192\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'IHDR' 16 13\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'iCCP' 41 2354\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:351 iCCP profile name b'default_rgb.icc'\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:352 Compression method 0\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'pHYs' 2407 9\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'tEXt' 2428 31\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'IDAT' 2471 8192\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'IHDR' 16 13\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'iCCP' 41 2354\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:351 iCCP profile name b'default_rgb.icc'\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:352 Compression method 0\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'pHYs' 2407 9\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'tEXt' 2428 31\r\nDEBUG    PIL.PngImagePlugin:PngImagePlugin.py:153 STREAM b'IDAT' 2471 8192\r\n```\r\n\r\n**Matplotlib version**\r\n  * Operating system: macOS\r\n  * Matplotlib version: v3.3.x\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): macosx, I guess, though maybe Agg for the test\r\n  * Python version: 3.8","author":{"url":"https://github.com/QuLogic","@type":"Person","name":"QuLogic"},"datePublished":"2020-09-23T21:20:49.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/18551/matplotlib/issues/18551"}