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java.lang.IncompatibleClassChangeError: Found class scalaz.Tree, but interface was expected	at org.specs2.mutable.SideEffectingCreationPaths$class.$init$(FragmentsBuilder.scala:245)	at org.specs2.mutable.Specification.(Specification.scala:12)	at controllers.VerificationApiSpec.(VerificationApiSpec.scala:26)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)	at org.specs2.reflect.Classes$class.createInstanceFor(Classes.scala:154)	at org.specs2.reflect.Classes$.createInstanceFor(Classes.scala:207)	at org.specs2.reflect.Classes$$anonfun$createInstanceOfEither$1.apply(Classes.scala:145)	at org.specs2.reflect.Classes$$anonfun$createInstanceOfEither$1.apply(Classes.scala:145)	at scala.Option.map(Option.scala:146)	at org.specs2.reflect.Classes$class.createInstanceOfEither(Classes.scala:145)	at org.specs2.reflect.Classes$.createInstanceOfEither(Classes.scala:207)	at org.specs2.reflect.Classes$class.org$specs2$reflect$Classes$$createInstanceForConstructor(Classes.scala:118)	at org.specs2.reflect.Classes$$anonfun$4.apply(Classes.scala:98)	at org.specs2.reflect.Classes$$anonfun$4.apply(Classes.scala:98)	at scala.collection.immutable.List.map(List.scala:273)	at org.specs2.reflect.Classes$class.tryToCreateObjectEither(Classes.scala:98)	at org.specs2.reflect.Classes$.tryToCreateObjectEither(Classes.scala:207)	at org.specs2.reflect.Classes$class.tryToCreateObject(Classes.scala:70)	at org.specs2.reflect.Classes$.tryToCreateObject(Classes.scala:207)	at org.specs2.specification.SpecificationStructure$.createSpecificationFromClassOrObject(BaseSpecification.scala:126)	at org.specs2.specification.SpecificationStructure$.createSpecificationOption(BaseSpecification.scala:107)	at org.specs2.specification.SpecificationStructure$.createSpecification(BaseSpecification.scala:95)	at org.specs2.runner.ClassRunner.createSpecification(ClassRunner.scala:60)	at org.specs2.runner.ClassRunner.start(ClassRunner.scala:31)	at org.specs2.runner.NotifierRunner.start(NotifierRunner.scala:25)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.jetbrains.plugins.scala.testingSupport.specs2.JavaSpecs2Runner.runSpecs2_old(JavaSpecs2Runner.java:133)	at org.jetbrains.plugins.scala.testingSupport.specs2.JavaSpecs2Runner.runSingleTest(JavaSpecs2Runner.java:204)	at org.jetbrains.plugins.scala.testingSupport.specs2.JavaSpecs2Runner.main(JavaSpecs2Runner.java:85)