1190 extract variable broken?

i'm getting this error when trying to extract a local variable. is this myself-fixable, aka known to be caused by a plugin?


com/intellij/lang/refactoring/DefaultRefactoringSupportProvider: com/intellij/lang/refactoring/DefaultRefactoringSupportProvider
java.lang.NoClassDefFoundError: com/intellij/lang/refactoring/DefaultRefactoringSupportProvider
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:466)
    at com.intellij.util.lang.UrlClassLoader._defineClass(UrlClassLoader.java:123)
    at com.intellij.util.lang.UrlClassLoader.defineClass(UrlClassLoader.java:119)
    at com.intellij.util.lang.UrlClassLoader._findClass(UrlClassLoader.java:95)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClassInsideSelf(PluginClassLoader.java:94)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:57)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at com.intellij.openapi.extensions.AbstractExtensionPointBean.findClass(AbstractExtensionPointBean.java:37)
    at com.intellij.openapi.extensions.AbstractExtensionPointBean.instantiate(AbstractExtensionPointBean.java:57)
    at com.intellij.openapi.extensions.CustomLoadingExtensionPointBean.instantiateExtension(CustomLoadingExtensionPointBean.java:45)
    at com.intellij.lang.LanguageExtensionPoint.access$000(LanguageExtensionPoint.java:28)
    at com.intellij.lang.LanguageExtensionPoint$1.compute(LanguageExtensionPoint.java:41)
    at com.intellij.openapi.util.NotNullLazyValue.getValue(NotNullLazyValue.java:34)
    at com.intellij.lang.LanguageExtensionPoint.getInstance(LanguageExtensionPoint.java:50)
    at com.intellij.openapi.util.KeyedExtensionCollector.buildExtensions(KeyedExtensionCollector.java:160)
    at com.intellij.openapi.util.KeyedExtensionCollector.buildExtensions(KeyedExtensionCollector.java:139)
    at com.intellij.openapi.util.KeyedExtensionCollector.forKey(KeyedExtensionCollector.java:129)
    at com.intellij.lang.LanguageExtension.allForLanguage(LanguageExtension.java:72)
    at com.intellij.refactoring.actions.BasePlatformRefactoringAction.isAvailableForLanguage(BasePlatformRefactoringAction.java:118)
    at com.intellij.refactoring.actions.BasePlatformRefactoringAction.a(BasePlatformRefactoringAction.java:135)
    at com.intellij.refactoring.actions.BasePlatformRefactoringAction.isHidden(BasePlatformRefactoringAction.java:128)
    at com.intellij.refactoring.actions.BaseRefactoringAction.update(BaseRefactoringAction.java:94)
    at com.intellij.openapi.actionSystem.AnAction.beforeActionPerformedUpdate(AnAction.java:227)
    at com.intellij.openapi.actionSystem.ex.ActionUtil.performDumbAwareUpdate(ActionUtil.java:95)
    at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:505)
    at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.d(IdeKeyEventDispatcher.java:425)
    at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:187)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:495)
    at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:406)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:370)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.ClassNotFoundException: com.intellij.lang.refactoring.DefaultRefactoringSupportProvider
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:70)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    ... 41 more



java.lang.ClassNotFoundException: com.intellij.lang.refactoring.DefaultRefactoringSupportProvider
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:70)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:466)
    at com.intellij.util.lang.UrlClassLoader._defineClass(UrlClassLoader.java:123)
    at com.intellij.util.lang.UrlClassLoader.defineClass(UrlClassLoader.java:119)
    at com.intellij.util.lang.UrlClassLoader._findClass(UrlClassLoader.java:95)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClassInsideSelf(PluginClassLoader.java:94)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:57)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at com.intellij.openapi.extensions.AbstractExtensionPointBean.findClass(AbstractExtensionPointBean.java:37)
    at com.intellij.openapi.extensions.AbstractExtensionPointBean.instantiate(AbstractExtensionPointBean.java:57)
    at com.intellij.openapi.extensions.CustomLoadingExtensionPointBean.instantiateExtension(CustomLoadingExtensionPointBean.java:45)
    at com.intellij.lang.LanguageExtensionPoint.access$000(LanguageExtensionPoint.java:28)
    at com.intellij.lang.LanguageExtensionPoint$1.compute(LanguageExtensionPoint.java:41)
    at com.intellij.openapi.util.NotNullLazyValue.getValue(NotNullLazyValue.java:34)
    at com.intellij.lang.LanguageExtensionPoint.getInstance(LanguageExtensionPoint.java:50)
    at com.intellij.openapi.util.KeyedExtensionCollector.buildExtensions(KeyedExtensionCollector.java:160)
    at com.intellij.openapi.util.KeyedExtensionCollector.buildExtensions(KeyedExtensionCollector.java:139)
    at com.intellij.openapi.util.KeyedExtensionCollector.forKey(KeyedExtensionCollector.java:129)
    at com.intellij.lang.LanguageExtension.allForLanguage(LanguageExtension.java:72)
    at com.intellij.refactoring.actions.BasePlatformRefactoringAction.isAvailableForLanguage(BasePlatformRefactoringAction.java:118)
    at com.intellij.refactoring.actions.BasePlatformRefactoringAction.a(BasePlatformRefactoringAction.java:135)
    at com.intellij.refactoring.actions.BasePlatformRefactoringAction.isHidden(BasePlatformRefactoringAction.java:128)
    at com.intellij.refactoring.actions.BaseRefactoringAction.update(BaseRefactoringAction.java:94)
    at com.intellij.openapi.actionSystem.AnAction.beforeActionPerformedUpdate(AnAction.java:227)
    at com.intellij.openapi.actionSystem.ex.ActionUtil.performDumbAwareUpdate(ActionUtil.java:95)
    at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:505)
    at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.d(IdeKeyEventDispatcher.java:425)
    at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:187)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:495)
    at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:406)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:370)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

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