Omit constraints referencing dict if a conflicting TypedDict constraint exists
#19225
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Diff from mypy_primer, showing the effect of this PR on open source code: core (https://github.com/home-assistant/core)
+ homeassistant/core.py:2342: error: Unused "type: ignore" comment [unused-ignore]
+ homeassistant/scripts/benchmark/__init__.py:144: error: Unused "type: ignore" comment [unused-ignore]
+ homeassistant/scripts/benchmark/__init__.py:144: error: Argument 2 to "async_fire" of "EventBus" has incompatible type "dict[str, object]"; expected "EventStateChangedData | None" [arg-type]
+ homeassistant/scripts/benchmark/__init__.py:144: note: Error code "arg-type" not covered by "type: ignore" comment
+ homeassistant/scripts/benchmark/__init__.py:177: error: Unused "type: ignore" comment [unused-ignore]
+ homeassistant/scripts/benchmark/__init__.py:177: error: Argument 2 to "async_fire" of "EventBus" has incompatible type "dict[str, object]"; expected "EventStateChangedData | None" [arg-type]
+ homeassistant/scripts/benchmark/__init__.py:177: note: Error code "arg-type" not covered by "type: ignore" comment
+ homeassistant/scripts/benchmark/__init__.py:215: error: Unused "type: ignore" comment [unused-ignore]
+ homeassistant/scripts/benchmark/__init__.py:215: error: Argument 2 to "async_fire" of "EventBus" has incompatible type "dict[str, object]"; expected "EventStateChangedData | None" [arg-type]
+ homeassistant/scripts/benchmark/__init__.py:215: note: Error code "arg-type" not covered by "type: ignore" comment
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Fixes #19201.
When inferring callable constraints, excludes constraints with
dicttarget when other constraints haveTypedDicttype. The right way to do this would be to allow backtracking in meet and join (so thatdictcan be promoted toTypedDictif possible), but that seems to be way more difficult and needs significant refactoring first.This should be safe as we never rely solely on solutions, such inference is followed by actually checking all arguments, so any incompatibilities will still be reported.