In addition, you must use the correct programming idiom to check if the collector has reclaimed the object before using it, and if it has, you must re-create the object first.
In many programming environments it will be possible to check in experimental code in such a way that no one except the author is affected by it.
许多编程环境是允许提交试验性代码的，这种代码除了提交者本人外不会影响任何人。
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