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via Google Groups by Kenneth Kalmer, 1 year ago
the number of constructors during runtime and compile time for groovy.lang.DelegatingMetaClass do not match. Expected -1 but got 2
java.lang.IncompatibleClassChangeError: the number of constructors during 
runtime and compile time for groovy.lang.DelegatingMetaClass do not match. 
Expected -1 but got 2	at geb.navigator.AttributeAccessingMetaClass.(AttributeAccessingMetaClass.groovy:24)	at geb.transform.AttributeAccessingMetaClassRegistrar.registerFor(AttributeAccessingMetaClassRegistrar.groovy:22)	at geb.navigator.NonEmptyNavigator.(NonEmptyNavigator.groovy:42)	at geb.navigator.factory.DefaultInnerNavigatorFactory.createNavigator(DefaultInnerNavigatorFactory.groovy:39)	at geb.navigator.factory.AbstractNavigatorFactory.createFromWebElements(AbstractNavigatorFactory.groovy:43)	at geb.navigator.factory.BrowserBackedNavigatorFactory.createBase(BrowserBackedNavigatorFactory.groovy:33)	at geb.navigator.factory.BrowserBackedNavigatorFactory.getBase(BrowserBackedNavigatorFactory.groovy:39)	at geb.content.NavigableSupport.getBase(NavigableSupport.groovy:31)	at geb.content.NavigableSupport.$(NavigableSupport.groovy:111)	at geb.content.PageContentTemplateFactoryDelegate.$(PageContentTemplateFactoryDelegate.groovy:142)	at pages.LoginPage$__clinit__closure2_closure3.doCall(LoginPage.groovy:10)	at geb.content.PageContentTemplate.invokeFactory(PageContentTemplate.groovy:97)	at geb.content.PageContentTemplate$_create_closure1.doCall(PageContentTemplate.groovy:59)	at geb.content.PageContentTemplate.create(PageContentTemplate.groovy:82)	at geb.content.PageContentTemplate.get(PageContentTemplate.groovy:54)	at geb.content.PageContentSupport.getContent(PageContentSupport.groovy:43)	at geb.content.PageContentSupport.propertyMissing(PageContentSupport.groovy:59)	at geb.Page.propertyMissing(Page.groovy:77)	at pages.LoginPage.login(LoginPage.groovy:18)	at LoginTest.testLoginFailure(LoginTest.groovy:11)