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types.UnionType no longer an alias of typing.Union and no longer subscriptable, but subscribing typing.Union returns an instance of types.UnionType. typing.Union can no ... |
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Merge 'types.UnionType' with typing._UnionGenericAlias, not typing.Union
#137065
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Fix Union type merging to use types.UnionType instead of typing.Union
#137068
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