CI/BLD: Build Failures on CircleCI

[TomAugspurger]

Seeing these somewhat regularly now. The cythonize step fails with

pandas/_libs/reshape.pyx:11:0: 'numpy/float16_t.pxd' not found

Examples:

• https://circleci.com/gh/pandas-dev/pandas/5122#tests/containers/3
• https://circleci.com/gh/pandas-dev/pandas/5176#tests/containers/3

cc @jbrockmendel if you have any ideas

[jbrockmendel]

Did it happen to start using cython 0.27 recently? I had trouble when upgrading last week, downgraded to wait for 0.27.1

[TomAugspurger]

Perhaps, I'll see if I can find any failures like this with older cythons. I haven't been able to reproduce with cython 0.27

[jbrockmendel]

What happens if you go into setup.py and remove the 'include': [] key from the ext_data entry for _libs.reshape?

[jreback]

these look all ok now. FYI we have been testing with cython 0.27 on the numpy_dev build for a week or so (its not the problem).

[TomAugspurger]

Back in https://circleci.com/gh/pandas-dev/pandas/5265#tests/containers/3

[jbrockmendel]

@TomAugspurger this showed up in #17750, went away after 0b9fff321328af1b172659c0d361eb5b6227b2ba