Forgetting releaseLock() permanently breaks the stream. The locked property tells you that a stream is locked, but not why, by whom, or whether the lock is even still usable. Piping internally acquires locks, making streams unusable during pipe operations in ways that aren't obvious.
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触屏 MacBook 的设计向来饱受争议，其中最旗帜鲜明的反对者，就是苹果公司的创始人——史蒂夫·乔布斯。