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The type parameters to `Union` may be `Type`s or `TypeVar`s, but `apply_type_tfunc` failed to recognize the latter as valid in the single-argument case.
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CI failure is due to 2 errors in threads test on x86_64-apple-darwin only, likely unrelated. |
vtjnash
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Jan 24, 2023
vtjnash
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Jan 24, 2023
| @@ -1713,7 +1713,7 @@ const _tvarnames = Symbol[:_A, :_B, :_C, :_D, :_E, :_F, :_G, :_H, :_I, :_J, :_K, | |||
| end | |||
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This if branch has a weird isa(ai, Type) instead of ai = widenconst(ai) call
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A brief look at the history reveals that it was added by some @martinholters in #27150 who apparently had no clue what he was doing, but merged it after @vtjnash had given his approval. 😄
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The type parameters to
Unionmay beTypes orTypeVars, butapply_type_tfuncfailed to recognize the latter as valid in the single-argument case.Fixes #48374.