java.lang.AssertionError
	at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionImpl.add(GrTypeDefinitionImpl.java:916)
	at com.intellij.codeInsight.generation.GenerateMembersUtil.insert(GenerateMembersUtil.java:9)
	at com.intellij.codeInsight.generation.PsiGenerationInfo.insert(PsiGenerationInfo.java:8)
	at com.intellij.codeInsight.generation.GenerateMembersUtil.insertMembersBeforeAnchor(GenerateMembersUtil.java:68)
	at com.intellij.codeInsight.generation.GenerateMembersUtil.insertMembersAtOffset(GenerateMembersUtil.java:66)
	at com.intellij.codeInsight.generation.GenerateMembersHandlerBase.a(GenerateMembersHandlerBase.java:40)
	at com.intellij.codeInsight.generation.GenerateMembersHandlerBase.access$000(GenerateMembersHandlerBase.java:35)
	at com.intellij.codeInsight.generation.GenerateMembersHandlerBase$1.run(GenerateMembersHandlerBase.java:1)
	at com.intellij.openapi.application.impl.ApplicationImpl$13.compute(ApplicationImpl.java:1)
	at com.intellij.psi.impl.source.PostprocessReformattingAspect.postponeFormattingInside(PostprocessReformattingAspect.java:33)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:15)
	at com.intellij.codeInsight.generation.GenerateMembersHandlerBase.invoke(GenerateMembersHandlerBase.java:34)
	at com.intellij.codeInsight.actions.CodeInsightAction$1$1.run(CodeInsightAction.java:56)
	at com.intellij.openapi.application.impl.ApplicationImpl$13.compute(ApplicationImpl.java:1)
	at com.intellij.psi.impl.source.PostprocessReformattingAspect.postponeFormattingInside(PostprocessReformattingAspect.java:33)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:15)
	at com.intellij.codeInsight.actions.CodeInsightAction$1.run(CodeInsightAction.java:60)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:5)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:74)
	at com.intellij.codeInsight.actions.CodeInsightAction.actionPerformedImpl(CodeInsightAction.java:50)
	at com.intellij.codeInsight.actions.CodeInsightAction.actionPerformed(CodeInsightAction.java:38)
	at com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep$1.run(PopupFactoryImpl.java:2)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:173)
	at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:178)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:143)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)