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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「像鬼一樣工作」：台灣外籍移工為何陷入「強迫勞動」處境
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🎁 Bonus: 所有代码已整理成单个.c文件，可直接编译运行：