Getting "EnclosingMethod" errors on building in Android Studio 2

Question

I am getting below build errors when I am running the app in Android Studio 2. These errors were not there when I was using earlier version of Android Studio.

Error:warning: Ignoring InnerClasses attribute for an anonymous inner class Error:(com.squareup.haha.guava.base.Joiner$1) that doesn't come with an Error:associated EnclosingMethod attribute. This class was probably produced by a Error:compiler that did not target the modern .class file format. The recommended Error:solution is to recompile the class from source, using an up-to-date compiler Error:and without specifying any "-target" type options. The consequence of ignoring Error:this warning is that reflective operations on this class will incorrectly Error:indicate that it is *not* an inner class. Error:warning: Ignoring InnerClasses attribute for an anonymous inner class Error:(com.squareup.haha.guava.collect.Iterables$2) that doesn't come with an Error:associated EnclosingMethod attribute. This class was probably produced by a Error:compiler that did not target the modern .class file format. The recommended Error:solution is to recompile the class from source, using an up-to-date compiler Error:and without specifying any "-target" type options. The consequence of ignoring Error:this warning is that reflective operations on this class will incorrectly Error:indicate that it is *not* an inner class. Error:warning: Ignoring InnerClasses attribute for an anonymous inner class Error:(com.squareup.haha.guava.collect.Iterables$3) that doesn't come with an Error:associated EnclosingMethod attribute. This class was probably produced by a Error:compiler that did not target the modern .class file format. The recommended Error:solution is to recompile the class from source, using an up-to-date compiler Error:and without specifying any "-target" type options. The consequence of ignoring Error:this warning is that reflective operations on this class will incorrectly Error:indicate that it is *not* an inner class. 

What are these errors and how to resolve them? Also, the apk is building fine and the app also runs perfectly.

Answer 1

Update 2016/09/19

This is fixed in LeakCanary 1.4, so simply upgrading should fix it without needing to mess with an alternate version of haha.

debugCompile 'com.squareup.leakcanary:leakcanary-android:1.4' 

Previously

These warnings are caused by haha:2.0.2, which is a dependency of leakcanary-android:1.4-beta2.

It's fixed in haha:2.0.3, so you can fix it by explicitly using the newer version in your dependencies. Add this line for each flavor where you are adding a leakcanary dependency. You don't need to add it for leakcanary-android-no-op, since it has no dependencies.

debugCompile 'com.squareup.haha:haha:2.0.3'