Message in Chinese (Traditional) (中文（繁體）)
這是錯誤的，如果聯合型別具有不同的聯合成員，則此成員不可以自己的成員身分代替。這可能是因為聯合成員具有 facet 聯合限制。
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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