com.sun.jdi.ObjectCollectedException
   at com.sun.tools.jdi.JDWPException.toJDIException(JDWPException.java:27)
   at com.sun.tools.jdi.ReferenceTypeImpl.signature(ReferenceTypeImpl.java:163)
   at com.sun.tools.jdi.TypeImpl.name(TypeImpl.java:25)
   at org.netbeans.modules.debugger.jpda.jdi.TypeWrapper.name(TypeWrapper.java:74)
   at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getCachedType(AbstractObjectVariable.java:639)
   at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getType(AbstractObjectVariable.java:660)
   at org.netbeans.modules.debugger.jpda.ui.models.VariablesTreeModelFilter.getFilter(VariablesTreeModelFilter.java:652)
   at org.netbeans.modules.debugger.jpda.ui.models.VariablesTreeModelFilter.access$400(VariablesTreeModelFilter.java:124)
   at org.netbeans.modules.debugger.jpda.ui.models.VariablesTreeModelFilter$3.run(VariablesTreeModelFilter.java:361)
   at org.netbeans.modules.debugger.jpda.ui.models.VariablesTreeModelFilter.run(VariablesTreeModelFilter.java:259)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)