Null agent description causes Bamboo to NPE

2016-01-25 15:08:10,306 WARN [13-BAM::Default Agent::Agent:pool-28-thread-1] [BuildAgentControllerImpl] Error occurred while executing the build for Interaction Check Service 2.0 - Master - Build, test, analyze #191 (ICS2-MAS-JOB1-191)
java.lang.NullPointerException: Log entry can't be null
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:226)
at com.atlassian.bamboo.build.SimpleLogEntry.<init>(SimpleLogEntry.java:36)
at com.atlassian.bamboo.build.SimpleLogEntry.<init>(SimpleLogEntry.java:30)
at com.atlassian.bamboo.build.logger.AbstractBuildLogger.addBuildLogEntry(AbstractBuildLogger.java:163)
at com.atlassian.bamboo.v2.build.agent.BuildAgentControllerImpl$1.call(BuildAgentControllerImpl.java:138)
at com.atlassian.bamboo.v2.build.agent.BuildAgentControllerImpl$1.call(BuildAgentControllerImpl.java:130)
at com.atlassian.bamboo.variable.CustomVariableContextImpl.withVariableSubstitutor(CustomVariableContextImpl.java:215)
at com.atlassian.bamboo.v2.build.agent.BuildAgentControllerImpl.waitAndPerformBuild(BuildAgentControllerImpl.java:129)
at com.atlassian.bamboo.v2.build.agent.DefaultBuildAgent$1.run(DefaultBuildAgent.java:136)
at com.atlassian.bamboo.utils.BambooRunnables$1.run(BambooRunnables.java:49)
at com.atlassian.bamboo.security.ImpersonationHelper.runWith(ImpersonationHelper.java:31)
at com.atlassian.bamboo.security.ImpersonationHelper.runWithSystemAuthority(ImpersonationHelper.java:20)
at com.atlassian.bamboo.security.ImpersonationHelper$1.run(ImpersonationHelper.java:52)
at java.lang.Thread.run(Thread.java:744)