[New-bugs-announce] [issue38151] test_types: test_duck_gen() leaks reference

[STINNER Victor]

New submission from STINNER Victor <vstinner at python.org>:

https://buildbot.python.org/all/#/builders/1/builds/712

Python 3.8 is not affected, only the master branch.

See also bpo-38150.

vstinner at apu$ ./python -m test test_types -R 3:3 -m test.test_types.CoroutineTests.test_duck_gen
Run tests sequentially
0:00:00 load avg: 0.89 [1/1] test_types
beginning 6 repetitions
123456
......
test_types leaked [7, 7, 7] references, sum=21
test_types failed

== Tests result: FAILURE ==

1 test failed:
    test_types

Total duration: 472 ms
Tests result: FAILURE

----------
components: Tests
messages: 352250
nosy: vstinner
priority: normal
severity: normal
status: open
title: test_types: test_duck_gen() leaks reference
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38151>
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