Abstract delegation: super's equals method delegates to an abstract method: null

[don-vip]

What steps will reproduce the problem?

I'm using EqualsVerifier 2.0.1 for several classes already, but I face an error I don't know how to solve.
I want to test a generic class which looks like that:

public class Storage<T> extends AbstractSet<T>

My equals() method calls super.equals().

What is the code that triggers this problem?

EqualsVerifier.forClass(Storage.class).usingGetClass().verify();

Please try to provide an example of a complete class (equals method, hashCode method, relevant fields) and a call to EqualsVerifier.

What error message or stack trace does EqualsVerifier give?

java.lang.AssertionError: Abstract delegation: AbstractSet's equals method delegates to an abstract method:
 null
For more information, go to: http://www.jqno.nl/equalsverifier/errormessages
at nl.jqno.equalsverifier.EqualsVerifier.handleError(EqualsVerifier.java:381)
at nl.jqno.equalsverifier.EqualsVerifier.verify(EqualsVerifier.java:367)
at org.openstreetmap.josm.data.osm.StorageTest.equalsContract(StorageTest.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.AbstractMethodError
at java.util.AbstractSet.equals(AbstractSet.java:92)
at nl.jqno.equalsverifier.AbstractDelegationChecker.checkAbstractMethods(AbstractDelegationChecker.java:129)
at nl.jqno.equalsverifier.AbstractDelegationChecker.checkAbstractDelegationInSuper(AbstractDelegationChecker.java:115)
at nl.jqno.equalsverifier.AbstractDelegationChecker.check(AbstractDelegationChecker.java:55)
at nl.jqno.equalsverifier.EqualsVerifier.verifyWithoutExamples(EqualsVerifier.java:405)
at nl.jqno.equalsverifier.EqualsVerifier.performVerification(EqualsVerifier.java:391)
at nl.jqno.equalsverifier.EqualsVerifier.verify(EqualsVerifier.java:364)
... 24 more

What did you expect?

Success.

Which version of EqualsVerifier are you using?

2.0.1

Please provide any additional information below.

[jqno]

I've just released version 2.0.2, which should fix this. Sorry it took a while.

[don-vip]

No problem, thanks for fixing it, I'm giving it a try :)