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Title: bpo-46642: explicitly disallow typing.TypeVar instance subclassing by GBeauregard · Pull Request #31148 · python/cpython · GitHub

Open Graph Title: bpo-46642: explicitly disallow typing.TypeVar instance subclassing by GBeauregard · Pull Request #31148 · python/cpython

X Title: bpo-46642: explicitly disallow typing.TypeVar instance subclassing by GBeauregard · Pull Request #31148 · python/cpython

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Open Graph Description: The existing test covering this case passed only incidentally. We explicitly disallow doing this and add a proper error message. The way this test passed before this PR is almost certainly a bug (s...

X Description: The existing test covering this case passed only incidentally. We explicitly disallow doing this and add a proper error message. The way this test passed before this PR is almost certainly a bug (s...

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explicitly disallow typing.TypeVar subclassinghttps://github.com/python/cpython/pull/31148/commits/c51f48ee1a964c9e225b8d95db45336a91b439b6
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Merge branch 'main' into fix-typevar-testhttps://github.com/python/cpython/pull/31148/commits/a7a6074f6b38621eea867f526b2e10fb6f67ff52
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