java.lang.NullPointerException
   at org.netbeans.spi.debugger.ui.EditorContextDispatcher.getMIMETypesOnLine(EditorContextDispatcher.java:329)
   at org.netbeans.spi.debugger.ui.EditorContextDispatcher.getMIMETypesOnCurrentLine(EditorContextDispatcher.java:307)
Caused: java.lang.reflect.InvocationTargetException
   at sun.reflect.GeneratedMethodAccessor22.invoke(GeneratedMethodAccessor22.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:497)
   at org.netbeans.spi.debugger.ActionsProvider$ContextAware.isCurrentMIMETypeIn(ActionsProvider.java:407)
   at org.netbeans.spi.debugger.ActionsProvider$ContextAware.isEnabled(ActionsProvider.java:278)
   at org.netbeans.api.debugger.ActionsManager.isEnabled(ActionsManager.java:406)
   at org.netbeans.modules.debugger.ui.actions.DebuggerAction.isEnabled(DebuggerAction.java:133)
   at org.netbeans.modules.debugger.ui.actions.DebuggerAction.access$000(DebuggerAction.java:73)
   at org.netbeans.modules.debugger.ui.actions.DebuggerAction$Listener.actionStateChanged(DebuggerAction.java:417)
   at org.netbeans.api.debugger.ActionsManager.fireActionStateChanged(ActionsManager.java:575)
   at org.netbeans.api.debugger.ActionsManager.access$1000(ActionsManager.java:67)
   at org.netbeans.api.debugger.ActionsManager$MyActionListener.actionStateChange(ActionsManager.java:787)
   at org.netbeans.spi.debugger.ActionsProviderSupport.fireActionStateChanged(ActionsProviderSupport.java:111)
   at org.netbeans.spi.debugger.ActionsProviderSupport.setEnabled(ActionsProviderSupport.java:98)
   at org.netbeans.modules.ruby.debugger.breakpoints.RubyBreakpointActionProvider.propertyChange(RubyBreakpointActionProvider.java:107)
   at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:215)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
   at org.netbeans.spi.debugger.ui.EditorContextDispatcher.firePropertyChange(EditorContextDispatcher.java:616)
   at org.netbeans.spi.debugger.ui.EditorContextDispatcher.access$2000(EditorContextDispatcher.java:122)
   at org.netbeans.spi.debugger.ui.EditorContextDispatcher$EventFirer.run(EditorContextDispatcher.java:1010)
   at org.netbeans.spi.debugger.ui.EditorContextDispatcher$EditorRegistryListener$1.run(EditorContextDispatcher.java:807)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)