Demo代码：

public abstract class TestContext {
    private static Map<Integer,TestContext> contextMap = new HashMap<>();
    static {
        contextMap.put(1,new TestOneContext());
    }
}

class TestOneContext extends TestContext {

}

静态代码块中，警告提示Referencing subclass TestOneContext from superclass TestContext initializer might lead to class loading deadlock

loading deadlock的具体原因是什么啊？由于classloader 机制导致的，子类需要父类加载完成，而父类又要实例化子类。同时发生时，会照成死锁？