New deprecation warnings about missing or inconsistent__spec__.loader and__loader__ introduced in#86298 are emitted only for the C implementation of thewarnings module. Existing errors (AttributeError or ValueError) are also only raised for the C implementation of thewarnings module. See tests added in#122227.

I believe that before turning the deprecation warnings into errors, we should add warnings for the Python implementation.

cc@brettcannon,@warsaw

Linked PRs

• gh-122255: Add black box tests in test_warnings #122227
• [3.13] gh-122255: Add black box tests in test_warnings (GH-122227) #122818
• [3.12] gh-122255: Add black box tests in test_warnings (GH-122227) #122819
• gh-122255: Synchronize warnings in C and Python implementations of the warnings module #122824