Since updating Hudson (1.371 to 1.378) and Emma (1.20 to 1.21) all our builds are failing due to a nullpointer in EmmaPublisher:

ERROR: Publisher hudson.plugins.emma.EmmaPublisher aborted due to exception
java.lang.NullPointerException
at hudson.plugins.emma.EmmaPublisher.perform(EmmaPublisher.java:132)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:601)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:580)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:558)
at hudson.model.Build$RunnerImpl.post2(Build.java:157)
at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:528)
at hudson.model.Run.run(Run.java:1303)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:137)

Same problem occurs with Version 1.20 of the Emma-Plugin which was installed previously.