When selecting an overload item for constraint template matching, treat any ParamSpec in the template as free #19487
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…at any ParamSpec in the template as free
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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Fixes #19480. This does not fix the root of the problem, but current logic seems to work well enough to keep as-is, at least until we have an inference engine that can handle multiple alternative constraints ("any of") in some more reliable way.
This should not cause any new false positives: previously a template with paramspec could only be matched against an overload item with
*args, **kwargsof some shape, and that will still be matched.