Netflix/feign — pull request #61 by davidmc24 (2013-08-30 19:59:30+00:00)
Title: Fix NullPointerException when equals or hashCode are called on proxy instance

They look something like this:

java.lang.NullPointerException
at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:88)
at feign.$Proxy16.equals(Unknown Source)

In my particular instance, I had a proxy created by Feign registered in a Spring application context,
and it resulted in a NullPointerException on application shutdown.