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.
США впервые ударили по Ирану ракетой PrSM. Что о ней известно и почему ее назвали «уничтожителем» российских С-400?20:16
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В России ответили на имитирующие высадку на Украине учения НАТО18:04
Марина Совина (ночной редактор)
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大年初十，村里举行游神活动，往年应该是阿爸去的，今年由我替他参加。南方周末记者郑彩琳摄