Need error informative error for invalid commadns - NPE with g.v.count vs g.V.count

[astubbs]

I know g.V. .. is the correct form, but a nicer error regarding syntax input would be nice

09:17:02 INFO mapred.LocalJobRunner: Map task executor complete.
09:17:02 WARN mapred.LocalJobRunner: job_local104758096_0006
java.lang.Exception: java.io.IOException: java.lang.reflect.InvocationTargetException
    at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:354)
Caused by: java.io.IOException: java.lang.reflect.InvocationTargetException
    at com.thinkaurelius.faunus.mapreduce.MapSequence$Map.setup(MapSequence.java:60)
    at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:364)
    at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:223)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.thinkaurelius.faunus.mapreduce.MapSequence$Map.setup(MapSequence.java:39)
    ... 10 more
Caused by: java.lang.NullPointerException
    at com.thinkaurelius.faunus.mapreduce.transform.VertexMap$Map.getLongCollection(VertexMap.java:57)
    at com.thinkaurelius.faunus.mapreduce.transform.VertexMap$Map.setup(VertexMap.java:42)
    ... 15 more
09:17:03 INFO mapred.JobClient: Job complete: job_local104758096_0006
09:17:03 INFO mapred.JobClient: Counters: 0
09:17:03 ERROR mapreduce.FaunusCompiler: Faunus job error -- remaining MapReduce jobs have been canceled