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
return;
                    }
                    itemCount[0] = resourceNames.getItemCount();
                    if (itemIndex[0] < itemCount[0]) {
                        resourceNames.setRedraw(false);
                        resourceNames.remove(itemIndex[0], itemCount[0] - 1);
                        resourceNames.setRedraw(true);
                    }
                    
                    if (resourceNames.getItemCount() == 0) {
                        folderNames.removeAll();
                    }
                }
            });
        }
    };
    /**
     * Creates a new instance of the class.
     * 
     * @param parentShell shell to parent the dialog on
     * @param resources resources to display in the dialog
     */
    public ResourceListSelectionDialog(Shell parentShell, IResource[] resources) {
        super(parentShell);
        setShellStyle(getShellStyle() | SWT.RESIZE);
        gatherResourcesDynamically = false;
        initDescriptors(resources);
    }
    /**
     * Creates a new instance of the class.  When this constructor is used to