sql std auth - show grant statement for all principals throws NPE

show grant on table t1;
2014-03-14 12:45:46,573 ERROR exec.DDLTask (DDLTask.java:execute(461)) - java.lang.NullPointerException
        at org.apache.hadoop.hive.ql.exec.DDLTask.getHivePrincipal(DDLTask.java:893)
        at org.apache.hadoop.hive.ql.exec.DDLTask.showGrantsV2(DDLTask.java:648)
        at org.apache.hadoop.hive.ql.exec.DDLTask.showGrants(DDLTask.java:553)
        at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:426)
        at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:153)
...
...