How to reproduce
When a bounded buffer fills up and a producer wants to write more, there are only a few things you can do:
，详情可参考Line官方版本下载
// 易错点3：处理最终结果为空的场景（比如num="10"，k=2）
Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10142-1