Just upgrading to jenkins 1.459, and now none of my promotions run, with this error message:

14:28:23 Started by upstream project "lanai-master/promotion/tapp-sandbox-rollout" build number 2169
14:28:23 FATAL: null
14:28:23 java.lang.NullPointerException
14:28:23 at org.jvnet.hudson.plugins.DownstreamBuildViewUpdateListener.onStarted(DownstreamBuildViewUpdateListener.java:85)
14:28:23 at org.jvnet.hudson.plugins.DownstreamBuildViewUpdateListener.onStarted(DownstreamBuildViewUpdateListener.java:46)
14:28:23 at hudson.model.listeners.RunListener.fireStarted(RunListener.java:188)
14:28:23 at hudson.model.Run.run(Run.java:1408)
14:28:23 at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
14:28:23 at hudson.model.ResourceController.execute(ResourceController.java:88)
14:28:23 at hudson.model.Executor.run(Executor.java:238)

Let me know if you need anything else.