Upgrading to 1.537 causes jenkins to show the following error on every page,
org.jvnet.hudson.reactor.ReactorException: java.lang.NullPointerException at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:246) at jenkins.InitReactorRunner.run(InitReactorRunner.java:43) at jenkins.model.Jenkins.executeReactor(Jenkins.java:915) at jenkins.model.Jenkins.<init>(Jenkins.java:811) at hudson.model.Hudson.<init>(Hudson.java:81) at hudson.model.Hudson.<init>(Hudson.java:77) at hudson.WebAppMain$3.run(WebAppMain.java:221) Caused by: java.lang.NullPointerException at java.io.Reader.<init>(Reader.java:78) at java.io.InputStreamReader.<init>(InputStreamReader.java:97) at org.codehaus.groovy.runtime.DefaultGroovyMethods.getText(DefaultGroovyMethods.java:16092) at groovy.lang.GroovyShell$7.run(GroovyShell.java:714) at groovy.lang.GroovyShell$7.run(GroovyShell.java:711) at java.security.AccessController.doPrivileged(Native Method) at groovy.lang.GroovyShell.parse(GroovyShell.java:711) at groovy.lang.GroovyShell.parse(GroovyShell.java:790) at hudson.util.spring.BeanBuilder.parse(BeanBuilder.java:133) at hudson.security.AbstractPasswordBasedSecurityRealm.createSecurityComponents(AbstractPasswordBasedSecurityRealm.java:46) at hudson.security.SecurityRealm.getSecurityComponents(SecurityRealm.java:398) at hudson.security.HudsonFilter.reset(HudsonFilter.java:134) at jenkins.model.Jenkins.setSecurityRealm(Jenkins.java:2055) at jenkins.model.Jenkins$20.run(Jenkins.java:2632) at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146) at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259) at jenkins.model.Jenkins$7.runTask(Jenkins.java:904) at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187) at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722