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
* @param index index of the resource descriptor
     * @param itemPos position of the existing item to update
     * @param itemCount number of items in the resources table widget
     */
    private void updateItem(int index, int itemPos, int itemCount) {
        ResourceDescriptor desc = descriptors[index];
        TableItem item;
        if (itemPos < itemCount) {
            item = resourceNames.getItem(itemPos);
            if (item.getData() != desc) {
                item.setText(desc.label);
                item.setData(desc);
                item.setImage(getImage(desc));
                if (itemPos == 0) {
                    resourceNames.setSelection(0);
                    updateFolders(desc);
                }
            }
        } else {
            item = new TableItem(resourceNames, SWT.NONE);
            item.setText(desc.label);
            item.setData(desc);
            item.setImage(getImage(desc));
            if (itemPos == 0) {
                resourceNames.setSelection(0);
                updateFolders(desc);
            }
        }
    }
}