René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"CI tests failing due to linking error in conda-based pytest","articleBody":"When PR #693 was merged, it started generating an error in the [conda-based pytest GitHub action](https://github.com/python-control/python-control/runs/6637792716).  The error occurs when importing scipy:\r\n```\r\nfrom scipy.signal import tf2zpk, zpk2tf, cont2discrete\r\n[17](https://github.com/python-control/python-control/runs/6637792716#step:5:18)\r\n/usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/signal/__init__.py:309: in \u003cmodule\u003e\r\n[18](https://github.com/python-control/python-control/runs/6637792716#step:5:19)\r\n    from . import _sigtools, windows\r\n[19](https://github.com/python-control/python-control/runs/6637792716#step:5:20)\r\n/usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/signal/windows/__init__.py:41: in \u003cmodule\u003e\r\n[20](https://github.com/python-control/python-control/runs/6637792716#step:5:21)\r\n    from ._windows import *\r\n[21](https://github.com/python-control/python-control/runs/6637792716#step:5:22)\r\n/usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/signal/windows/_windows.py:7: in \u003cmodule\u003e\r\n[22](https://github.com/python-control/python-control/runs/6637792716#step:5:23)\r\n    from scipy import linalg, special, fft as sp_fft\r\n[23](https://github.com/python-control/python-control/runs/6637792716#step:5:24)\r\n/usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/fft/__init__.py:91: in \u003cmodule\u003e\r\n[24](https://github.com/python-control/python-control/runs/6637792716#step:5:25)\r\n    from ._helper import next_fast_len\r\n[25](https://github.com/python-control/python-control/runs/6637792716#step:5:26)\r\n/usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/fft/_helper.py:3: in \u003cmodule\u003e\r\n[26](https://github.com/python-control/python-control/runs/6637792716#step:5:27)\r\n    from ._pocketfft import helper as _helper\r\n[27](https://github.com/python-control/python-control/runs/6637792716#step:5:28)\r\n/usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/fft/_pocketfft/__init__.py:3: in \u003cmodule\u003e\r\n[28](https://github.com/python-control/python-control/runs/6637792716#step:5:29)\r\n    from .basic import *\r\n[29](https://github.com/python-control/python-control/runs/6637792716#step:5:30)\r\n/usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/fft/_pocketfft/basic.py:6: in \u003cmodule\u003e\r\n[30](https://github.com/python-control/python-control/runs/6637792716#step:5:31)\r\n    from . import pypocketfft as pfft\r\n[31](https://github.com/python-control/python-control/runs/6637792716#step:5:32)\r\nE   ImportError: /usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/linalg/../../../../libstdc++.so.6: version `GLIBCXX_3.4.30' not found (required by /usr/share/miniconda/envs/test-environment/lib/python3.9/site-packages/scipy/fft/_pocketfft/pypocketfft.cpython-39-x86_64-linux-gnu.so)\r\n```\r\nOther CI tests are working, so it is probably something in the way that we are managing dependencies in the GitHub action scripts.\r\n","author":{"url":"https://github.com/murrayrm","@type":"Person","name":"murrayrm"},"datePublished":"2022-05-28T16:12:29.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/735/python-control/issues/735"}