julia

30d11a3b - Fix `apply_type_tfunc` for `Union{T::TypeVar}` (#48384)

Fix `apply_type_tfunc` for `Union{T::TypeVar}` (#48384) 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.