delete with null columnQualifier occurs NullPointerException when NewVersionBehavior is on

@Test
public void testNullColumnQualifier() throws IOException {
  try (Table t = createTable()) {
    Delete del = new Delete(ROW);
    del.addColumn(FAMILY, null);
    t.delete(del);
    Result r = t.get(new Get(ROW)); //NPE happens.
    assertTrue(r.isEmpty());
  }
} 

 //output
Caused by: java.lang.NullPointerException at org.apache.hadoop.hbase.regionserver.querymatcher.NewVersionBehaviorTracker.add(NewVersionBehaviorTracker.java:214) at org.apache.hadoop.hbase.regionserver.querymatcher.NormalUserScanQueryMatcher.match(NormalUserScanQueryMatcher.java:73) at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:627) at org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:157) at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.populateResult(HRegion.java:6672) at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:6836) at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:6606) at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.next(HRegion.java:6583) at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.next(HRegion.java:6570) at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2645) at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2571) at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:42274) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:418) ... 3 more