temporarily fix double free problem in mutate test. Need to look into this case and define the free behaviors for freeing unlined data. The mutate test still fails due to other problems when parallel test is enabled
temporarily fix double free problem in mutate test. Need to look into this case and define the free behaviors for freeing unlined data.
The mutate test still fails due to other problems when parallel test is enabled

eric-haibin-lin/peloton,eric-haibin-lin/peloton,eric-haibin-lin/peloton,eric-haibin-lin/peloton,eric-haibin-lin/peloton,eric-haibin-lin/peloton,eric-haibin-lin/peloton