Hello LuJian-666,
I have not received any official feedback on my bug report yet and DTS Engineer Quinn has stated that they are not aware of a work around. The only thing I can think of that might help is to file a bug report of your own. Somewhere I read that more bug reports help draw attention to the issue. There is a link in a previous response in this thread.
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Developer Tools & Services
SubTopic:
Swift Playground
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