org.eclipse.core.runtime.CoreException: BUILD FAILED
at org.eclipse.buckminster.ant.AntRunner.handleInvocationTargetException(AntRunner.java:167)
at org.eclipse.buckminster.ant.AntRunner.run(AntRunner.java:322)
at org.eclipse.buckminster.ant.actor.AntActor.internalPerform(AntActor.java:254)
at org.eclipse.buckminster.core.actor.AbstractActor.perform(AbstractActor.java:195)
at org.eclipse.buckminster.core.internal.actor.PerformManager$DirectActionInvocation.execute(PerformManager.java:143)
at org.eclipse.buckminster.core.internal.actor.PerformManager.internalPerform(PerformManager.java:454)
at org.eclipse.buckminster.core.internal.actor.PerformManager.perform(PerformManager.java:293)
at org.eclipse.buckminster.core.internal.actor.PerformManager.perform(PerformManager.java:305)
at org.eclipse.buckminster.ui.InvokeActionJob.runInWorkspace(InvokeActionJob.java:67)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:459)
at org.apache.tools.ant.PropertyHelper.setUserProperty(PropertyHelper.java:750)
at org.apache.tools.ant.Project.setUserProperty(Project.java:563)
at org.eclipse.ant.internal.core.ant.InternalAntRunner.setProperties(InternalAntRunner.java:267)
at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:632)
at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:525)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.eclipse.buckminster.ant.AntRunner.run(AntRunner.java:318)
... 9 more
BUILD FAILED: java.lang.NullPointerException