Hello.

When we attempted to upgrade to Python 3.10.0b3 on Fedora 33 and 34, we see the following test failure:



======================================================================
ERROR: test_entry_points_by_index (test.test_importlib.test_metadata_api.APITests)
Prior versions of Distribution.entry_points would return a
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/Python-3.10.0b3/Lib/test/test_importlib/test_metadata_api.py", line 145, in test_entry_points_by_index
    expected = next(iter(caught))
StopIteration
----------------------------------------------------------------------
Ran 1402 tests in 2.125s
FAILED (errors=1, skipped=18, expected failures=1)


I've reproduced it without any Fedora's patches:

$ cd cpython
$ git switch -d v3.10.0b3  # or the tip of 3.10 today, 77eaf14d27

$ ./configure --enable-shared && make

$ LD_LIBRARY_PATH=. ./python -m test test_importlib
0:00:00 load avg: 13.59 Run tests sequentially
0:00:00 load avg: 13.59 [1/1] test_importlib
test test_importlib failed -- Traceback (most recent call last):
  File "/home/churchyard/Dokumenty/RedHat/cpython/Lib/test/test_importlib/test_metadata_api.py", line 145, in test_entry_points_by_index
    expected = next(iter(caught))
StopIteration

test_importlib failed

== Tests result: FAILURE ==

1 test failed:
    test_importlib

Total duration: 11.0 sec
Tests result: FAILURE