fix: 修正增强 for 循环中 Iterator fail-fast 机制的描述#2820
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Snailclimb merged 1 commit intomainfrom Apr 9, 2026
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原描述错误地声称 Iterator 工作在独立线程中并持有 mutex 锁， 实际机制是通过 modCount/expectedModCount 计数器比较实现 fail-fast。 同时修正了 Iterator.remove() 的说明。 Closes #2818
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Summary
ConcurrentModificationException原因的错误描述modCount/expectedModCount计数器比较实现 fail-fastIterator.remove()的说明：原文说"维护索引的一致性"，实际是同步更新expectedModCountCloses #2818
Test plan
ArrayList.Itr）中 fail-fast 实现一致