When open source code diff page in local changes tab, below exception occurred:

ava.lang.NullPointerException
     at com.pmease.quickbuild.web.page.source.SourceDiffPage.onInitialize(SourceDiffPage.java:134)
     at org.apache.wicket.Component.fireInitialize(Component.java:1009)
     at org.apache.wicket.MarkupContainer.internalInitialize(MarkupContainer.java:953)
     at org.apache.wicket.Page.internalPrepareForRender(Page.java:285)
     at org.apache.wicket.Component.render(Component.java:2333)
     at org.apache.wicket.Page.renderPage(Page.java:1120)
     at org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:105)
     at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:218)
     at org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:139)
     at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:718)
     at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:63)
     at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:96)
     at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212)
     at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:253)
     at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:138)
     at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:137)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
     at com.pmease.quickbuild.web.WebServlet.service(WebServlet.java:122)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.equinox.http.helper.FilterServletAdaptor$FilterChainImpl.doFilter(FilterServletAdaptor.java:56)
     at org.mortbay.servlet.UserAgentFilter.doFilter(UserAgentFilter.java:78)
     at org.mortbay.servlet.GzipFilter.doFilter(GzipFilter.java:131)
     at org.eclipse.equinox.http.helper.FilterServletAdaptor.service(FilterServletAdaptor.java:37)
     at com.pmease.quickbuild.web.HttpServiceProvider$1$1.service(HttpServiceProvider.java:86)
     at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
     at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:126)
     at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:76)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:318)
     at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
     at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
... ...