NullPointerException in LogonImpl when Credential Delegate is not enabled

When trying to connect via JDBC using GSS authentication, the follwing exception is thrown if Credential Delegation is not enabled. Via ODBC, same setup works fine.

2014-10-14 11:22:35,199 INFO [org.teiid.SECURITY] (New I/O worker #4 TEIID40017 Unexpected exception for session null: java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:514)
at org.teiid.transport.LogonImpl.neogitiateGssLogin(LogonImpl.java:197)
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:606)
at org.teiid.transport.ServerWorkItem.run(ServerWorkItem.java:87)
at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:274)
at org.teiid.transport.SocketClientInstance.processMessagePacket(SocketClientInstance.java:207)
at org.teiid.transport.SocketClientInstance.receivedMessage(SocketClientInstance.java:193)
at org.teiid.transport.SSLAwareChannelHandler.messageReceived(SSLAwareChannelHandler.java:211)