CI warning is causing build to fail

[MarcoGorelli]

The following shows up in some recent jobs: https://github.com/pandas-dev/pandas/actions/runs/3641110250/jobs/6146658226

2022-12-07T17:13:17.4282435Z pandas/_libs/tslibs/parsing.c: In function ‘__pyx_f_6pandas_5_libs_6tslibs_7parsing_dateutil_parse.constprop’:
2022-12-07T17:13:17.4286489Z pandas/_libs/tslibs/parsing.c:10634:22: error: array subscript ‘PyMethodObject[0]’ is partly outside array bounds of ‘PyObject[1]’ {aka ‘struct _object[1]’} [-Werror=array-bounds]
2022-12-07T17:13:17.4287232Z 10634 |           __pyx_t_10 = PyMethod_GET_SELF(__pyx_t_2);
2022-12-07T17:13:17.4288524Z In file included from /home/runner/micromamba/envs/test/include/python3.8/pytime.h:6,
2022-12-07T17:13:17.4289063Z                  from /home/runner/micromamba/envs/test/include/python3.8/Python.h:85,
2022-12-07T17:13:17.4289520Z                  from pandas/_libs/tslibs/parsing.c:46:
2022-12-07T17:13:17.4290230Z /home/runner/micromamba/envs/test/include/python3.8/object.h:560:22: note: while referencing ‘_Py_NoneStruct’
2022-12-07T17:13:17.4290904Z   560 | PyAPI_DATA(PyObject) _Py_NoneStruct; /* Don't use this directly */
2022-12-07T17:13:17.4291327Z       |                      ^~~~~~~~~~~~~~
2022-12-07T17:13:17.4299214Z pandas/_libs/tslibs/parsing.c:10636:23: error: array subscript ‘PyMethodObject[0]’ is partly outside array bounds of ‘PyObject[1]’ {aka ‘struct _object[1]’} [-Werror=array-bounds]
2022-12-07T17:13:17.4299878Z 10636 |             PyObject* function = PyMethod_GET_FUNCTION(__pyx_t_2);
2022-12-07T17:13:17.4300282Z       |                       ^~~~~~~~
2022-12-07T17:13:17.4300776Z In file included from /home/runner/micromamba/envs/test/include/python3.8/pytime.h:6,
2022-12-07T17:13:17.4301291Z                  from /home/runner/micromamba/envs/test/include/python3.8/Python.h:85,
2022-12-07T17:13:17.4301779Z                  from pandas/_libs/tslibs/parsing.c:46:
2022-12-07T17:13:17.4302447Z /home/runner/micromamba/envs/test/include/python3.8/object.h:560:22: note: while referencing ‘_Py_NoneStruct’
2022-12-07T17:13:17.4303287Z   560 | PyAPI_DATA(PyObject) _Py_NoneStruct; /* Don't use this directly */
2022-12-07T17:13:17.4303722Z       |                      ^~~~~~~~~~~~~~
2022-12-07T17:13:18.5474602Z cc1: all warnings being treated as errors

Example of green job: https://github.com/pandas-dev/pandas/actions/runs/3633476581/jobs/6130537543
Example of red job: https://github.com/pandas-dev/pandas/actions/runs/3641110250/jobs/6146658226

Can't tell what's caused this

Here's the difference between the environments:

                                                  Name Version_x Version_y
0    ──────────────────────────────────────────────...      None      None
59                                           db-dtypes     1.0.4     1.0.5
109                               google-cloud-storage     2.6.0     2.7.0
114                                             grpcio    1.49.1    1.51.1
115                                      grpcio-status    1.49.1    1.51.1
126                                importlib_resources    5.10.0    5.10.1
183                                            libgrpc    1.49.1    1.51.1
284                                     prompt-toolkit    3.0.33    3.0.36

[MarcoGorelli]

@jbrockmendel any idea what might be causing this?

[jbrockmendel]

no idea cc @WillAyd ?

[MarcoGorelli]

pinning ubuntu seems to have fixed it #50113