Bug 331335 [Wizards] Bad implementation of IWizard's dispose() method can prevent the dialog from closing
If there is bad client code in an IWizard's dispose() method, the dialog get into a state where it cannot be closed. ------------ Run this code and try to close the wizard dialog, you will not be able to. Display display = new Display(); Wizard wizard = new Wizard() { public boolean performFinish() { return true; } public void dispose() { throw new RuntimeException(); } }; WizardDialog dialog = new WizardDialog(null, wizard); dialog.open(); display.dispose(); ------------ java.lang.RuntimeException at Main$5.dispose(Main.java:142) at org.eclipse.jface.wizard.WizardDialog.hardClose(WizardDialog.java:859) at org.eclipse.jface.wizard.WizardDialog.close(WizardDialog.java:484) at org.eclipse.jface.window.Window.handleShellCloseEvent(Window.java:741) at org.eclipse.jface.window.Window$3.shellClosed(Window.java:687) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:98)
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/Wizard.java
* return the page that was added to this wizard before the given page.
     */
    public IWizardPage getPreviousPage(IWizardPage page) {
        int index = pages.indexOf(page);
        if (index == 0 || index == -1) {
			
            return null;
		} 
		return (IWizardPage) pages.get(index - 1);
    }
    /**
     * Returns the wizard's shell if the wizard is visible. Otherwise
     * <code>null</code> is returned.
     * 
     * @return Shell
     */
    public Shell getShell() {
        if (container == null) {
			return null;
		}
        return container.getShell();
    }
    /*
     * (non-Javadoc) Method declared on IWizard. By default this is the first
     * page inserted into the wizard.
     */
    public IWizardPage getStartingPage() {
        if (pages.size() == 0) {
			return null;
		}