I have a job that is configured to trigger downstream job as a post build action. It gives me the following NPE:

Warning: you have no plugins providing access control for builds, so falling back to legacy behavior of permitting any downstream builds to be triggered
FATAL: null
java.lang.NullPointerException
at hudson.model.Result.isBetterOrEqualTo(Result.java:125)
at hudson.tasks.BuildTrigger$2.shouldTriggerBuild(BuildTrigger.java:285)
at hudson.tasks.BuildTrigger.execute(BuildTrigger.java:243)
at hudson.model.AbstractBuild$AbstractBuildExecution.cleanUp(AbstractBuild.java:674)
at hudson.model.Build$BuildExecution.cleanUp(Build.java:193)
at hudson.model.Run.execute(Run.java:1755)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:231)

This is happening only in 1.561 and works fine in 1.556