默认方法返回true一段时间，然后返回false？ （可能的JVM错误）

I have an issue with the following code, which I isolated to the most closed form, I am using Java 8, which is almost ready for launch (18 March 2014), so I expect no serious issues in the implementation itself, so it may/must be my own code:I have an issue with the following code, which