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Sync typeshed - #14992
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Sync typeshed#14992
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Source commit: python/typeshed@6fd245d
This is allegedly causing large performance problems, see 13821 typeshed/8231 had zero hits on mypy_primer, so it's not the worst thing to undo. Patching this in typeshed also feels weird, since there's a more general soundness issue. If a typevar has a bound or constraint, we might not want to solve it to a Literal. If we can confirm the performance regression or fix the unsoundness within mypy, I might pursue upstreaming this in typeshed. (Reminder: add this to the sync_typeshed script once merged)
Since the plugin provides superior type checking: python#13987 (comment)
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Diff from mypy_primer, showing the effect of this PR on open source code: cwltool (https://github.com/common-workflow-language/cwltool)
+ cwltool/cuda.py: note: In function "cuda_version_and_device_count":
+ cwltool/cuda.py:21:13: error: Item "Node" of "Optional[Node]" has no attribute "data" [union-attr]
+ cwltool/cuda.py:21:13: error: Item "None" of "Optional[Node]" has no attribute "data" [union-attr]
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The sole mypy_primer hit comes from: |
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Source commit: python/typeshed@6fd245d
The automated PR failed again last night due to merge conflicts in the
functoolspatch: https://github.com/python/mypy/actions/runs/4580127588/jobs/8088541502