Source: matplotlib Version: 3.8.3-1 Severity: normal The matplotlib build is failing tests during the transition from 3.7 to 3.8 (for debian, that's from 3.6 to 3.8), when docs are being built <!nodoc>.
The reason is twofold - upstream changed the import handling of mpl_toolkits (they removed __init__.py) - the doc build has a circular dependency in python3-sphinx-gallery, which Depends on python3-matplotlib. If python3-matplotlib 3.6 is installed (as forced by python3-sphinx-gallery), then when matplot v3.8 tests are run, python selects the 3.6 version of mpl_toolkits instead of the newly built 3.8 version. Consequently the test run fails (the Axes3D API changed between 3.6 and 3.8). The problem is discussed upstream at https://github.com/matplotlib/matplotlib/issues/26827 It's effectively unavoidable (short of not building docs in order to avoid python3-sphinx-gallery), we just have to hold our breath and push through to v3.8. But in any case this test failure is ignored, and the debian build goes on to build the packages anyway. This is actually a "good" thing for the 3.6 → 3.8 transition. We can build the new packages in spite of the build time test failure. But in general (after 3.8 or 3.9 is settled in testing), we should probably check the tests and not ignore failure e.g. use `set -e` at the beginning of the test block
