Bamboo build fails with java.lang.IllegalStateException

After creating a plan the initial build remains in "building state", although the current activity tab says that the build has passed -

28-Mar-2008 12:14:25 Running pre-build action: VCS Version Collector
28-Mar-2008 12:14:25 Building started with CustomCommandBuilder
28-Mar-2008 12:14:25
Starting to build 'Test - sdf'
... running command line: /bin/bash a.bash
... in : /Users/asridhar/Bamboo/homes/trunk/xml-data/build-dir/TST-DDDD
... using java: null
... using environment variables:
28-Mar-2008 12:14:25 a
28-Mar-2008 12:14:25 Build process for 'Test - sdf' returned with return code = 0
28-Mar-2008 12:14:25 Failed to execute build: @NotNull method com/atlassian/bamboo/v2/build/CurrentBuildResultImpl.getBuildState must not return null
28-Mar-2008 12:14:25 Finalising the build...
28-Mar-2008 12:14:25 Stopping timer.
28-Mar-2008 12:14:25 Build TST-DDDD-1 completed.
28-Mar-2008 12:14:25 Running post build plugin on server 'Clover Delta Calculator'

Where as on the dashboard I get the exception below -

Build Test - sdf 1 : Failed to execute build 'com.atlassian.bamboo.v2.build.CurrentBuildResultImpl@9ebca3'
(java.lang.IllegalStateException : @NotNull method com/atlassian/bamboo/v2/build/CurrentBuildResultImpl.getBuildState must not return null)java.lang.IllegalStateException: @NotNull method com/atlassian/bamboo/v2/build/CurrentBuildResultImpl.getBuildState must not return null
at com.atlassian.bamboo.v2.build.CurrentBuildResultImpl.getBuildState(CurrentBuildResultImpl.java)
at com.atlassian.bamboo.builder.AbstractBuilder.determineBuildStatus(AbstractBuilder.java:400)
at com.atlassian.bamboo.builder.AbstractBuilder.collateTestResults(AbstractBuilder.java:361)
at com.atlassian.bamboo.builder.AbstractBuilder.runBuild(AbstractBuilder.java:280)
at com.atlassian.bamboo.builder.AbstractBuilder.executeBuild(AbstractBuilder.java:232)
at com.atlassian.bamboo.build.pipeline.tasks.ExecuteBuildTask.call(ExecuteBuildTask.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at org.springframework.orm.hibernate.HibernateInterceptor.invoke(HibernateInterceptor.java:117)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy42.call(Unknown Source)
at com.atlassian.bamboo.v2.build.agent.DefaultBuildAgent.build(DefaultBuildAgent.java:188)
at com.atlassian.bamboo.v2.build.agent.BuildAgentControllerImpl.waitAndPerformBuild(BuildAgentControllerImpl.java:86)
at com.atlassian.bamboo.v2.build.agent.DefaultBuildAgent$1.run(DefaultBuildAgent.java:101)
at com.atlassian.bamboo.build.pipeline.concurrent.NamedThreadFactory$1.run(NamedThreadFactory.java:32)
at edu.emory.mathcs.backport.java.util.concurrent.helpers.ThreadHelpers$1.run(ThreadHelpers.java:34)
at java.lang.Thread.run(Thread.java:613)