Description Katarzyna Marsza³ek 2007-08-01 07:33:32 EDT

Build ID:  I20070625-1500

Steps To Reproduce:
 Simple case:

        new ComputedValue() {

            final IObservableValue name = BeansObservables.observeValue(dto, "name"); //$NON-NLS-1$

            @Override
            protected Object calculate() {
                return name.getValue() != null;
            }
        };


More information:
When ComputedValue recalculates the value, it calls the makeDirty() and then stopListening() methods which, in turn, may result in call to lastListenerRemoved() (if there are no other listeners attached) in the JavaBeanObservableValue class, causing listenerSupport.dispose() call. From now on, adding new listeners (which happens next during the calculate call) will cause NullPointerException.