混淆之后，apkpatch的时候出现java.lang.RuntimeException

没混淆之前是没有问题的，但增加了混淆之后就出现异常

```
-keep class com.alipay.euler.andfix.AndFix { *; }
-keep class com.alipay.euler.andfix.annotation.MethodReplace { *; }
-keep class * extends java.lang.annotation.Annotation
-keepclasseswithmembernames class * {
native ;
}
```

是我操作出现了问题了吗？ 这个问题搞了好久，求帮助

异常信息：

```
java.lang.RuntimeException: can,t add new Field:a(I), in class :Lcom/euler/a/a;
at com.euler.patch.diff.DiffInfo.addAddedFields(DiffInfo.java:77)
at com.euler.patch.diff.DexDiffer.compareField(DexDiffer.java:132)
at com.euler.patch.diff.DexDiffer.compareField(DexDiffer.java:101)
at com.euler.patch.diff.DexDiffer.compareField(DexDiffer.java:95)
at com.euler.patch.diff.DexDiffer.diff(DexDiffer.java:32)
at com.euler.patch.ApkPatch.doPatch(ApkPatch.java:68)
at com.euler.patch.Main.main(Main.java:97)
```

Reproduce the failure with the reported obfuscation and keep rules, then trace the stack from ApkPatch.java through DexDiffer.java to DiffInfo.java, especially the addAddedFields path. Compare the obfuscated class and field data involved in the exception; done means apkpatch completes without the reported RuntimeException.

Written by the indexing model from the issue text.