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java.lang.NullPointerException: 	at hudson.util.RunList$9.apply(RunList.java:271)	at hudson.util.RunList$9.apply(RunList.java:269)	at com.google.common.collect.Iterators$7.computeNext(Iterators.java:649)	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)	at hudson.util.Iterators$8.fetch(Iterators.java:358)	at hudson.util.Iterators$8.hasNext(Iterators.java:345)	at org.kohsuke.stapler.export.Property.writeValue(Property.java:181)	at org.kohsuke.stapler.export.Property.writeValue(Property.java:137)	at org.kohsuke.stapler.export.Property.writeTo(Property.java:114)	at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:187)	at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:182)	at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:182)	at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:182)	at org.kohsuke.stapler.export.Model.writeTo(Model.java:154)	at org.kohsuke.stapler.ResponseImpl.serveExposedBean(ResponseImpl.java:222)	at hudson.model.Api.doXml(Api.java:94)	at sun.reflect.GeneratedMethodAccessor350.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:288)	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:151)	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:90)	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:111)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)	at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:203)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)	at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:574)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:659)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:488)	at org.kohsuke.stapler.Stapler.service(Stapler.java:162)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:95)	at hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:58)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:98)	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:87)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:50)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)	at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:306)	at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:323)	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1719)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:662)