H4 query code completion throws exception

java.lang.LinkageError: loader constraint violation: when resolving method "org.hibernate.eclipse.console.workbench.HibernateWorkbenchHelper.getImage(Lorg/hibernate/mapping/Property;)Lorg/eclipse/swt/graphics/Image;" the class loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) of the current class, org/jboss/tools/hibernate4_0/console/EclipseHQLCompletionRequestor, and the class loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) for resolved class, org/hibernate/eclipse/console/workbench/HibernateWorkbenchHelper, have different Class objects for the type org/hibernate/mapping/Property used in the signature
at org.jboss.tools.hibernate4_0.console.EclipseHQLCompletionRequestor.getImage(EclipseHQLCompletionRequestor.java:120)
at org.jboss.tools.hibernate4_0.console.EclipseHQLCompletionRequestor.accept(EclipseHQLCompletionRequestor.java:59)
at org.hibernate.tool.ide.completion.ConfigurationCompletion.addPropertiesToList(ConfigurationCompletion.java:187)
at org.hibernate.tool.ide.completion.ConfigurationCompletion.getMatchingProperties(ConfigurationCompletion.java:80)
at org.hibernate.tool.ide.completion.HQLCodeAssist.codeComplete(HQLCodeAssist.java:66)
at org.jboss.tools.hibernate4_0.console.ConsoleExtension4_0.hqlCodeComplete(ConsoleExtension4_0.java:93)
at org.hibernate.eclipse.hqleditor.HQLCompletionProcessor.computeProposals(HQLCompletionProcessor.java:122)
at org.hibernate.eclipse.hqleditor.HQLCompletionProcessor.computeCompletionProposals(HQLCompletionProcessor.java:82)
at org.hibernate.eclipse.hqleditor.HQLCompletionProcessor.computeCompletionProposals(HQLCompletionProcessor.java:65)
at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1830)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:556)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$16(CompletionProposalPopup.java:553)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:488)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:482)
at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1656)
at org.hibernate.eclipse.hqleditor.HQLSourceViewer.doOperation(HQLSourceViewer.java:58)
at org.eclipse.ui.texteditor.TextOperationAction$1.run(TextOperationAction.java:128)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.texteditor.TextOperationAction.run(TextOperationAction.java:126)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:185)
at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:109)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:468)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:786)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:885)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:567)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:508)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:123)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1069)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4127)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1494)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1490)
at org.eclipse.swt.widgets.Canvas.sendKeyEvent(Canvas.java:463)
at org.eclipse.swt.widgets.Control.doCommandBySelector(Control.java:1051)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5563)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
at org.eclipse.swt.internal.cocoa.NSResponder.interpretKeyEvents(NSResponder.java:68)
at org.eclipse.swt.widgets.Composite.keyDown(Composite.java:587)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5473)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220)
at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2092)
at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2252)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5535)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:4989)
at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5138)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3610)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
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:344)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)