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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: test_figure_leak_20490 repeatedly failing on CI","articleBody":"### Bug summary\n\n`lib/matplotlib/tests/test_backends_interactive.py::test_figure_leak_20490[time_mem0-MPLBACKEND=wxagg-BACKEND_DEPS=wx]` has been failing for a while on CI now, just on the `Tests / Python 3.10 on ubuntu-20.04 (pull_request)` job. See e.g. [this run](https://github.com/matplotlib/matplotlib/actions/runs/7483622289/job/20369156885?pr=27634) for an example failure. \r\n\r\nThe trace is\r\n```python\r\n ______ test_figure_leak_20490[time_mem0-MPLBACKEND=wxagg-BACKEND_DEPS=wx] ______\r\n[gw1] linux -- Python 3.10.13 /opt/hostedtoolcache/Python/3.10.13/x64/bin/python\r\n\r\nenv = {'BACKEND_DEPS': 'wx', 'MPLBACKEND': 'wxagg'}, time_mem = (0.0, 2000000)\r\nrequest = \u003cFixtureRequest for \u003cFunction test_figure_leak_20490[time_mem0-MPLBACKEND=wxagg-BACKEND_DEPS=wx]\u003e\u003e\r\n\r\n    @pytest.mark.skipif(sys.platform == \"win32\",\r\n                        reason=\"appveyor tests fail; gh-22988 suggests reworking\")\r\n    @pytest.mark.parametrize(\"env\", _get_testable_interactive_backends())\r\n    @pytest.mark.parametrize(\"time_mem\", [(0.0, 2_000_000), (0.1, 30_000_000)])\r\n    def test_figure_leak_20490(env, time_mem, request):\r\n        pytest.importorskip(\"psutil\", reason=\"psutil needed to run this test\")\r\n    \r\n        # We haven't yet directly identified the leaks so test with a memory growth\r\n        # threshold.\r\n        pause_time, acceptable_memory_leakage = time_mem\r\n        if env[\"MPLBACKEND\"] == \"wx\":\r\n            pytest.skip(\"wx backend is deprecated; tests failed on appveyor\")\r\n    \r\n        if env[\"MPLBACKEND\"] == \"macosx\":\r\n            request.node.add_marker(pytest.mark.xfail(reason=\"macosx backend is leaky\"))\r\n    \r\n        if env[\"MPLBACKEND\"] == \"tkagg\" and sys.platform == \"darwin\":\r\n            acceptable_memory_leakage += 11_000_000\r\n    \r\n        result = _run_helper(\r\n            _test_figure_leak, str(pause_time),\r\n            timeout=_test_timeout, extra_env=env)\r\n    \r\n        growth = int(result.stdout)\r\n\u003e       assert growth \u003c= acceptable_memory_leakage\r\nE       AssertionError\r\n\r\nlib/matplotlib/tests/test_backends_interactive.py:687: AssertionError\r\n```\n\n### Code for reproduction\n\n```python\nn/a\n```\n\n\n### Actual outcome\n\nFailing test\n\n### Expected outcome\n\nPassing test\n\n### Additional information\n\n_No response_\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\nCurrent main\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n_No response_\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\ngit checkout","author":{"url":"https://github.com/dstansby","@type":"Person","name":"dstansby"},"datePublished":"2024-01-11T11:14:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/27635/matplotlib/issues/27635"}