TST: Prevent blocking error in Travis CI

[pllim]

The error on Travis CI:

error: [Errno 11] write could not complete without blocking
Exception ignored in: <_io.TextIOWrapper name='<stdout>' mode='w' encoding='UTF8'>
BlockingIOError: [Errno 11] write could not complete without blocking

I am not sure if this will fix your problem or not but it's worth a try? If this doesn't work, be sure to revert the change. Solution based on travis-ci/travis-ci#8982 (comment) .

Others mentioned they put it in before_install but given that you use ci-helpers, I moved it to after you activated the conda env.

🤷‍♀

[bsipocz]

Thanks @pllim, I owe you my eternal gratitude.

If travis passes, I'll cherry pick the commit and try it directly on the test branch, as the issue didn't come up for a long time on PR runs, but only on direct pushes. If that's fine, too, I'll merge the PR.

[pllim]

LoL... No such module on Windows...

ModuleNotFoundError: No module named 'fcntl'

[bsipocz]

That's ok, it wasn't an issue to begin with on windows.

(also for the record, your investigation was rather nice, hiding the whole workaround in a stale-bot closed issue wasn't a super nice approach from the CI folks)

[pllim]

Well, it is green but should keep an eye on master for a while yet to see if we just got lucky or this is really the solution.

hiding the whole workaround in a stale-bot closed issue wasn't a super nice approach

I am surprised too. They did not even really explain the cause. I am glad we have Internet search. 😅

[bsipocz]

Thanks @pllim!

[pllim]

Let's hope you are not thanking me prematurely. 🤞 😅

[bsipocz]

It was passing on the direct branch, too, so I'm confident 😅

[pllim]

First run after merge looked promising. Only remote data job failed and the failure is not this. 🤞

= 9 failed, 1288 passed, 32 skipped, 7 xfailed, 2 xpassed in 2308.11s (0:38:28) =
WARNING: AstropyDeprecationWarning: The remote_data option should be one of none/astropy/any (found =any). For backward-compatibility, assuming 'any', but you should change the option to be one of the supported ones to avoid issues in future. [astropy.tests.runner]