Starting repository without transactions results in NPE

javax.jcr.RepositoryException: Error while starting 'DataRepository' repository: null
          at org.modeshape.jcr.JcrRepository.login(JcrRepository.java:611)
          at org.modeshape.jcr.JcrRepository.login(JcrRepository.java:568)
          at org.modeshape.jcr.JcrRepository.login(JcrRepository.java:147)
          at au.com.infomedix.notransaction.TransactionTest.simpleAccess(TransactionTest.java:76)
          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:597)
          at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
          at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
          at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
          at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
          at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
          at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
          at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
          at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
          at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
          at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
          at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
          at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
          at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
          at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
          at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
          at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
          at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
          at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
          at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
          at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
          at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
          at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.NullPointerException
          at org.modeshape.jcr.txn.SynchronizedTransactions.begin(SynchronizedTransactions.java:60)
          at org.modeshape.jcr.cache.document.WritableSessionCache.save(WritableSessionCache.java:362)
          at org.modeshape.jcr.cache.document.WritableSessionCache.save(WritableSessionCache.java:337)
          at org.modeshape.jcr.cache.RepositoryCache.<init>(RepositoryCache.java:174)
          at org.modeshape.jcr.JcrRepository$RunningState.<init>(JcrRepository.java:1069)
          at org.modeshape.jcr.JcrRepository$RunningState.<init>(JcrRepository.java:960)
          at org.modeshape.jcr.JcrRepository.doStart(JcrRepository.java:352)
          at org.modeshape.jcr.JcrRepository.login(JcrRepository.java:609)
          ... 29 more