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.
Цены на нефть взлетели до максимума за полгода17:55
，这一点在搜狗输入法下载中也有详细论述
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Цены на нефть взлетели до максимума за полгода17:55