⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot wasm32-emscripten node (pthreads) 3.12 has failed when building commit a70b2cd.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/1146/builds/394) and take a look at the build logs.
4. Check if the failure is related to this commit (a70b2cd) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/1146/builds/394

Failed tests:

• test_fileio

Failed subtests:

• testErrnoOnClosedTruncate - test.test_fileio.CAutoFileTests.testErrnoOnClosedTruncate

Summary of the results of the build (if available):

==

Traceback (most recent call last):
  File "/opt/buildbot/bcannon-wasm/3.12.bcannon-wasm.emscripten-node-pthreads/build/Lib/test/test_fileio.py", line 274, in wrapper
    self.assertEqual(e.errno, errno.EBADF)
AssertionError: 28 != 8


Traceback (most recent call last):
  File "/opt/buildbot/bcannon-wasm/3.12.bcannon-wasm.emscripten-node-pthreads/build/Lib/test/test_fileio.py", line 272, in wrapper
    func(self, f)
  File "/opt/buildbot/bcannon-wasm/3.12.bcannon-wasm.emscripten-node-pthreads/build/Lib/test/test_fileio.py", line 302, in testErrnoOnClosedTruncate
    f.truncate(0)
OSError: [Errno 28] Invalid argument