When a build has no labels it will throw a null pointer exception due to the change in JENKINS-9773

Jul 27, 2011 12:04:46 PM hudson.triggers.SafeTimerTask run
SEVERE: Timer task hudson.slaves.NodeProvisioner$NodeProvisionerInvoker@1454f68 failed
java.lang.NullPointerException
at hudson.plugins.ec2.EC2Cloud.getTemplate(EC2Cloud.java:127)
at hudson.plugins.ec2.EC2Cloud.canProvision(EC2Cloud.java:239)
at hudson.slaves.NodeProvisioner.update(NodeProvisioner.java:220)
at hudson.slaves.NodeProvisioner.access$000(NodeProvisioner.java:51)
at hudson.slaves.NodeProvisioner$NodeProvisionerInvoker.doRun(NodeProvisioner.java:308)
at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:54)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)