在Android kotlin 项目中开启混淆后出现了
INT for value: v24(2) by constraint: OBJECT
一直修改配置，总是不对，找不到原因。最后更改了配置解决了。

-flattenpackagehierarchy
-allowaccessmodification
-keepattributes Exceptions,InnerClasses,Signature,SourceFile,LineNumberTable,
-dontskipnonpubliclibraryclassmembers
-ignorewarnings
#kotlin
-keep class kotlin.** { *; }
-keep class kotlin.Metadata { *; }
-dontwarn kotlin.**
-keepclassmembers class **$WhenMappings {
    <fields>;
}
-keepclassmembers class kotlin.Metadata {
    public <methods>;
}
-assumenosideeffects class kotlin.jvm.internal.Intrinsics {
    static void checkParameterIsNotNull(java.lang.Object, java.lang.String);
}

-keepclasseswithmembernames class * {
    native <methods>;
}

-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}
-keepclassmembers class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}
-keep class **.R$* {*;}
-keepclassmembers enum * { *;}