代码混淆出问题，求大神！

Question

Unexpected error while editing code:
Class = [com/ad/control/AdService]
Method = [a(Lcom/ad/view/d;)V]
Exception = java.lang.IllegalArgumentException
Unexpected error while shrinking instructions after partial evaluation:
Class = [com/ad/control/AdService]
Method = [a(Lcom/ad/view/d;)V]
Exception = java.lang.IllegalArgumentException
Not optimizing this method
Unexpected error while editing code:
Class = [com/ad/control/AdService]
Method = [b(Lcom/ad/view/d;)V]
Exception = java.lang.IllegalArgumentException
Unexpected error while shrinking instructions after partial evaluation:
Class = [com/ad/control/AdService]
Method = [b(Lcom/ad/view/d;)V]
Exception = java.lang.IllegalArgumentException
Not optimizing this method
Unexpected error while editing code:
Class = [com/ad/control/d]
Method = [a(Lcom/ad/view/d;)V]
Exception = java.lang.IllegalArgumentException
Unexpected error while shrinking instructions after partial evaluation:
Class = [com/ad/control/d]
Method = [a(Lcom/ad/view/d;)V]
Exception = java.lang.IllegalArgumentException
混淆后出现上面的问题，不知道是不是哪个没有keep住，求会混淆的大神帮忙

Answer 1

混淆-optimizationpasses 2，1次或2次，3次以上会出错