java.lang.NoClassDefFoundError: groovy/lang/Script

I have an Eclipse RCP application built on Eclipse 3.0.1. I get the error mentioned in the subject line when I do the following:

• Add the groovy-all-*.jar to the project (both the project build path as well as the plugin.xml runtime path)
• Add the following code to the project (executed via menu item and script is inserted via a dialog box)

GroovyShell shell = new GroovyShell();

String groovyScript = text.getText();

logger.debug("Running script: " + groovyScript);

try

{ Object value = shell.evaluate(groovyScript); }

catch (CompilationFailedException e1)

{ e1.printStackTrace(); }

catch (Throwable t)

{ t.printStackTrace(); }

• I get the following stacktrace:

java.lang.NoClassDefFoundError: groovy/lang/Script
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at groovy.lang.GroovyClassLoader.access$200(GroovyClassLoader.java:83)
at groovy.lang.GroovyClassLoader$ClassCollector.onClassNode(GroovyClassLoader.java:541)
at groovy.lang.GroovyClassLoader$ClassCollector.call(GroovyClassLoader.java:552)
at org.codehaus.groovy.control.CompilationUnit$5.call(CompilationUnit.java:635)
at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:850)
at org.codehaus.groovy.control.CompilationUnit.classgen(CompilationUnit.java:556)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:461)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:271)
at groovy.lang.GroovyShell.parseClass(GroovyShell.java:536)
at groovy.lang.GroovyShell.parse(GroovyShell.java:548)
at groovy.lang.GroovyShell.parse(GroovyShell.java:527)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:505)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:484)
at us.fl.state.dep.waste.bpss.first.client.interfaces.dialogs.GroovyScriptDialog$1.widgetSelected(GroovyScriptDialog.java:81)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:89)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2773)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2432)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:668)
at org.eclipse.jface.window.Window.open(Window.java:648)
at us.fl.state.dep.waste.bpss.first.client.FirstClientWorkbenchAdvisor$47.run(FirstClientWorkbenchAdvisor.java:632)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:881)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:915)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:866)
at org.eclipse.jface.action.ActionContributionItem$7.handleEvent(ActionContributionItem.java:785)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2773)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2432)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
at us.fl.state.dep.waste.bpss.first.client.FirstClientApplication.run(FirstClientApplication.java:68)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
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:324)
at org.eclipse.core.launcher.Main.basicRun(Main.java:185)
at org.eclipse.core.launcher.Main.run(Main.java:704)
at org.eclipse.core.launcher.Main.main(Main.java:688)

I've tried this with beta 6, JSR 01-03, and the latest CVS build which labels itself as 04-SNAPSHOT.

I've seen mention of this problem in reference to Eclipse RCP in another JIRA issue, but it was reported as resolved. I'm unsure where to go from here, since the bug still happens in my case.