[issue42010] Generic types accept indexing/subscripting, causing confusion

[Ken Jin]

Change by Ken Jin <kenjin4096 at gmail.com>:


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pull_requests: +21779
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/22822

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42010>
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