Bug 73769 [Dialogs] Open Resource dialog has OK enabled when entry invalid
3.0.1 RC2 - Ctrl+Shift+R - type: WorkbenchWino (note the missing d) and hit Enter - the dialog is dismissed with no action Should disable OK if there is no match.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/ResourceListSelectionDialog.java
boolean stop = false;
        int lastMatch = -1;
        int firstMatch = 0;
        boolean refilter = false;
        public void run() {
            Display display = resourceNames.getDisplay();
            final int itemIndex[] = { 0 };
            final int itemCount[] = { 0 };
             
            
            final boolean[] disposed = { false };
            display.syncExec(new Runnable() {
                public void run() {
                    
                    if (resourceNames.isDisposed()) {
                        disposed[0] = true;
                        return;
                    }
                    itemCount[0] = resourceNames.getItemCount();
                }