JavaScriptException: Cannot call method 'nullMethod' of null arguments: nullMethod

[SamBFries]

I'm having an issue with my GWT/GAE app.  Whenever it returns one
specific kind of serialized object from the backend via RPC, I get
this exception and a failure.  I know the code is working on the
backend (it'll be included under the stack trace).
(Exception)

    com.google.gwt.core.client.JavaScriptException: (TypeError):
Cannot call method 'nullMethod' of null
     arguments: nullMethod,
     type: non_object_property_call
     stack: TypeError: Cannot call method 'nullMethod' of null
        at Object.ClientPlayer_1 (http://rpstag.appspot.com/
com.MES.Tap2/A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:993:89)
        at Object.ClientPlayer_0 (http://rpstag.appspot.com/
com.MES.Tap2/A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:984:18)
        at Array.instantiate_1 [as 0] (http://rpstag.appspot.com/
com.MES.Tap2/A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:1031:10)
        at $instantiate_0 (http://rpstag.appspot.com/com.MES.Tap2/
A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:10660:34)
        at $instantiate (http://rpstag.appspot.com/com.MES.Tap2/
A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:1948:10)
        at $readObject (http://rpstag.appspot.com/com.MES.Tap2/
A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:10148:95)
        at Object.read_8 [as read] (http://rpstag.appspot.com/
com.MES.Tap2/A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:10608:10)
        at $onResponseReceived (http://rpstag.appspot.com/com.MES.Tap2/
A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:10352:247)
        at $fireOnResponseReceived (http://rpstag.appspot.com/
com.MES.Tap2/A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:5002:5)
        at Object.onReadyStateChange (http://rpstag.appspot.com/
com.MES.Tap2/A37A2E2E9A65DB1BAAE2BFA42572F7F8.cache.html:5222:5)


(Code)
@Override
public ClientPlayer login(String uid) {
    PersistenceManager pm=PMF.get().getPersistenceManager();
    log.warning(Player.class.getName());
    log.warning(uid);
    Key k=KeyFactory.createKey(Player.class.getSimpleName(), uid);
    Player p;
    List<List<Integer>> stats;
    try{
        p=pm.getObjectById(Player.class, k);
    } catch (JDOObjectNotFoundException e){
        p=new Player(uid);
        p.setKey(k);
        pm.makePersistent(p);
    } finally {
        pm.close();
    }
    stats=p.getStats();
    return new ClientPlayer(p.getUID(),p.getPerm(),
p.getDecks(),stats.get(0), stats.get(1), stats.get(2));
}

If you have anything else you want me to post, I'll be happy to
provide it.

Thanks!
-Sam

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