Fix checkpoint_test valgrind complaint
Fix checkpoint_test valgrind complaint

AllisonWang/peloton,eric-haibin-lin/peloton-1,haojin2/peloton,AngLi-Leon/peloton,malin1993ml/peloton,jessesleeping/iso_peloton,wangziqi2016/peloton,jessesleeping/iso_peloton,AngLi-Leon/peloton,prashasthip/peloton,vittvolt/peloton,apavlo/peloton,wangziqi2016/peloton,phisiart/peloton-p3,AngLi-Leon/peloton,eric-haibin-lin/peloton-1,seojungmin/peloton,yingjunwu/peloton,apavlo/peloton,vittvolt/peloton,wangziqi2016/peloton,seojungmin/peloton,seojungmin/peloton,AngLi-Leon/peloton,cmu-db/peloton,vittvolt/15721-peloton,malin1993ml/peloton,yingjunwu/peloton,apavlo/peloton,wangziqi2016/peloton,eric-haibin-lin/peloton-1,haojin2/peloton,prashasthip/peloton,wangziqi2016/peloton,eric-haibin-lin/peloton-1,haojin2/peloton,vittvolt/15721-peloton,vittvolt/15721-peloton,ShuxinLin/peloton,malin1993ml/peloton,PauloAmora/peloton,yingjunwu/peloton,jessesleeping/iso_peloton,cmu-db/peloton,yingjunwu/peloton,ShuxinLin/peloton,vittvolt/peloton,yingjunwu/peloton,prashasthip/peloton,cmu-db/peloton,cmu-db/peloton,vittvolt/15721-peloton,phisiart/peloton-p3,phisiart/peloton-p3,PauloAmora/peloton,PauloAmora/peloton,malin1993ml/peloton,jessesleeping/iso_peloton,cmu-db/peloton,jessesleeping/iso_peloton,AllisonWang/peloton,vittvolt/peloton,AngLi-Leon/peloton,seojungmin/peloton,PauloAmora/peloton,PauloAmora/peloton,seojungmin/peloton,eric-haibin-lin/peloton-1,vittvolt/15721-peloton,malin1993ml/peloton,cmu-db/peloton,phisiart/peloton-p3,haojin2/peloton,jessesleeping/iso_peloton,ShuxinLin/peloton,apavlo/peloton,AllisonWang/peloton,malin1993ml/peloton,vittvolt/15721-peloton,vittvolt/peloton,vittvolt/peloton,yingjunwu/peloton,wangziqi2016/peloton,haojin2/peloton,apavlo/peloton,phisiart/peloton-p3,AllisonWang/peloton,prashasthip/peloton,ShuxinLin/peloton,seojungmin/peloton,AngLi-Leon/peloton,AllisonWang/peloton,AllisonWang/peloton,PauloAmora/peloton,prashasthip/peloton,ShuxinLin/peloton,phisiart/peloton-p3,prashasthip/peloton,jessesleeping/iso_peloton,haojin2/peloton,eric-haibin-lin/peloton-1,ShuxinLin/peloton,apavlo/peloton