If fn() takes longer than the timeout then the parent returns nil and nobody ever reads from ch. The child goroutine blocks on ch <- result and will never be cleaned up. Go garbage-collects objects, but it doesn’t garbage-collect goroutines blocked on channels that will never be read.
Tourette's film nominated for six BAFTA awards
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In this article, we'll examine the history of ATMs—by IBM. IBM was just one of，更多细节参见PDF资料
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