抽空搭建了个国内版—The Go Playground

In the playground the time begins at 2009-11-10 23:00:00 UTC (determining the significance of this date is an exercise for the reader). This makes it easier to cache programs by giving them deterministic output.

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这个怎么有些包例如 ("github.com/pkg/errors") ,已使用,就不行.很多包不支持吗