Message in Chinese (Simplified) (中文(简体))
如果联合类型有包含各种联合的成员，并且该成员无法使用其自己的成员替换，则是错误的。这可能是因为该联合成员是对具有方面的联合的限制。
Unlocalized message
It is an error if a union type has a member with variety union and this member cannot be substituted with its own members. This may be due to the fact that the union member is a restriction of a union with facets.
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