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java.lang.ClassCircularityError: org/eclipse/core/net/proxy/IProxyChangeListener	at org.eclipse.mylyn.internal.tasks.ui.util.TaskPreferenceTester.shouldShowTrim(TaskPreferenceTester.java:35)	at org.eclipse.mylyn.internal.tasks.ui.util.TaskPreferenceTester.test(TaskPreferenceTester.java:29)	at org.eclipse.core.internal.expressions.Property.test(Property.java:58)	at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression.java:99)	at org.eclipse.ui.internal.services.EvaluationResultCache.evaluate(EvaluationResultCache.java:74)	at org.eclipse.ui.internal.services.ExpressionAuthority.evaluate(ExpressionAuthority.java:165)	at org.eclipse.ui.internal.services.EvaluationAuthority.refsWithSameExpression(EvaluationAuthority.java:153)	at org.eclipse.ui.internal.services.EvaluationAuthority.sourceChanged(EvaluationAuthority.java:129)	at org.eclipse.ui.internal.services.ExpressionAuthority.sourceChanged(ExpressionAuthority.java:311)	at org.eclipse.ui.internal.services.ExpressionAuthority.sourceChanged(ExpressionAuthority.java:290)	at org.eclipse.ui.AbstractSourceProvider.fireSourceChanged(AbstractSourceProvider.java:99)	at org.eclipse.ui.internal.services.WorkbenchSourceProvider.checkActivePart(WorkbenchSourceProvider.java:401)	at org.eclipse.ui.internal.services.WorkbenchSourceProvider.checkActivePart(WorkbenchSourceProvider.java:300)	at org.eclipse.ui.internal.services.WorkbenchSourceProvider.handleCheck(WorkbenchSourceProvider.java:286)	at org.eclipse.ui.internal.services.WorkbenchSourceProvider.checkOtherSources(WorkbenchSourceProvider.java:855)	at org.eclipse.ui.internal.services.WorkbenchSourceProvider$6.handleEvent(WorkbenchSourceProvider.java:839)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1058)	at org.eclipse.swt.widgets.Decorations.WM_ACTIVATE(Decorations.java:1664)	at org.eclipse.swt.widgets.Shell.WM_ACTIVATE(Shell.java:2145)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4525)	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627)	at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2069)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4976)	at org.eclipse.swt.internal.win32.OS.BringWindowToTop(Native Method)	at org.eclipse.swt.widgets.Decorations.bringToTop(Decorations.java:231)	at org.eclipse.swt.widgets.Shell.open(Shell.java:1217)	at org.eclipse.jface.window.Window.open(Window.java:797)	at org.eclipse.equinox.internal.security.ui.storage.DefaultPasswordProvider$1.run(DefaultPasswordProvider.java:49)	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180)	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4687)	at org.eclipse.equinox.internal.security.ui.storage.DefaultPasswordProvider.getPassword(DefaultPasswordProvider.java:47)	at org.eclipse.equinox.internal.security.storage.PasswordProviderModuleExt.getPassword(PasswordProviderModuleExt.java:35)	at org.eclipse.equinox.internal.security.storage.SecurePreferencesRoot.getModulePassword(SecurePreferencesRoot.java:259)	at org.eclipse.equinox.internal.security.storage.SecurePreferencesRoot.getPassword(SecurePreferencesRoot.java:224)	at org.eclipse.equinox.internal.security.storage.SecurePreferences.get(SecurePreferences.java:262)	at org.eclipse.equinox.internal.security.storage.SecurePreferencesWrapper.get(SecurePreferencesWrapper.java:106)	at org.eclipse.core.internal.net.ProxyType.loadProxyAuth(ProxyType.java:537)	at org.eclipse.core.internal.net.ProxyType.createProxyData(ProxyType.java:138)	at org.eclipse.core.internal.net.ProxyType.getProxyData(ProxyType.java:127)	at org.eclipse.core.internal.net.ProxyType.initialize(ProxyType.java:517)	at org.eclipse.core.internal.net.ProxyManager.initialize(ProxyManager.java:274)	at org.eclipse.core.internal.net.Activator.start(Activator.java:181)	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)	at java.security.AccessController.doPrivileged(Native Method)	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:300)	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:440)	at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:263)	at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:469)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)	at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)	at org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:35)	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:461)	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)	at java.lang.Class.getDeclaredConstructors0(Native Method)	at java.lang.Class.privateGetDeclaredConstructors(Class.java:2398)	at java.lang.Class.getConstructor0(Class.java:2708)	at java.lang.Class.newInstance0(Class.java:328)	at java.lang.Class.newInstance(Class.java:310)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator(AbstractBundle.java:167)	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:679)	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:300)	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:440)	at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:263)	at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:469)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)	at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:464)	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)	at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:340)	at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:229)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1212)	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174)	at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)	at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)	at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)	at org.eclipse.core.internal.expressions.PropertyTesterDescriptor.instantiate(PropertyTesterDescriptor.java:92)	at org.eclipse.core.internal.expressions.TypeExtension.findTypeExtender(TypeExtension.java:91)	at org.eclipse.core.internal.expressions.TypeExtension.findTypeExtender(TypeExtension.java:124)	at org.eclipse.core.internal.expressions.TypeExtension.findTypeExtender(TypeExtension.java:124)	at org.eclipse.core.internal.expressions.TypeExtension.findTypeExtender(TypeExtension.java:124)	at org.eclipse.core.internal.expressions.TypeExtensionManager.getProperty(TypeExtensionManager.java:114)	at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression.java:96)	at org.eclipse.ui.internal.services.EvaluationResultCache.evaluate(EvaluationResultCache.java:74)	at org.eclipse.ui.internal.services.ExpressionAuthority.evaluate(ExpressionAuthority.java:165)	at org.eclipse.ui.internal.services.EvaluationAuthority.addEvaluationListener(EvaluationAuthority.java:79)	at org.eclipse.ui.internal.services.EvaluationService.addEvaluationListener(EvaluationService.java:47)	at org.eclipse.ui.internal.menus.WorkbenchMenuService.registerVisibleWhen(WorkbenchMenuService.java:884)	at org.eclipse.ui.internal.menus.ContributionRoot.addContributionItem(ContributionRoot.java:60)	at org.eclipse.ui.internal.menus.MenuAdditionCacheEntry.createContributionItems(MenuAdditionCacheEntry.java:188)	at org.eclipse.ui.internal.menus.WorkbenchMenuService$5.run(WorkbenchMenuService.java:584)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.ui.internal.menus.WorkbenchMenuService.processAdditions(WorkbenchMenuService.java:656)	at org.eclipse.ui.internal.menus.WorkbenchMenuService.addContributionsToManager(WorkbenchMenuService.java:744)	at org.eclipse.ui.internal.menus.WorkbenchMenuService.populateContributionManager(WorkbenchMenuService.java:730)	at org.eclipse.ui.internal.menus.TrimContributionManager$ToolBarTrimProxy.dock(TrimContributionManager.java:75)	at org.eclipse.ui.internal.menus.TrimContributionManager.update(TrimContributionManager.java:265)	at org.eclipse.ui.internal.WorkbenchWindow.updateLayoutDataForContents(WorkbenchWindow.java:3874)	at org.eclipse.ui.internal.WorkbenchWindow.setLayoutDataForContents(WorkbenchWindow.java:3885)	at org.eclipse.ui.internal.WorkbenchWindow.createDefaultContents(WorkbenchWindow.java:1157)	at org.eclipse.ui.internal.WorkbenchWindowConfigurer.createDefaultContents(WorkbenchWindowConfigurer.java:623)	at org.eclipse.ui.application.WorkbenchWindowAdvisor.createWindowContents(WorkbenchWindowAdvisor.java:300)	at org.eclipse.ui.internal.WorkbenchWindow.createContents(WorkbenchWindow.java:1043)	at org.eclipse.jface.window.Window.create(Window.java:431)	at org.eclipse.ui.internal.Workbench$22.runWithException(Workbench.java:1216)	at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4144)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)	at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)	at org.eclipse.ui.internal.Workbench$33.runWithException(Workbench.java:1600)	at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4144)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2609)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)	at org.eclipse.equinox.launcher.Main.run(Main.java:1438)	at org.eclipse.equinox.launcher.Main.main(Main.java:1414)