after mempcy, verify that src[i] == dst[i] == i and count mismatches
after mempcy, verify that src[i] == dst[i] == i and count mismatches

hanw/connectal,hanw/connectal,csail-csg/connectal,hanw/connectal,hanw/connectal,csail-csg/connectal,hanw/connectal,cambridgehackers/connectal,chenm001/connectal,cambridgehackers/connectal,csail-csg/connectal,cambridgehackers/connectal,csail-csg/connectal,chenm001/connectal,chenm001/connectal,cambridgehackers/connectal,chenm001/connectal,chenm001/connectal,csail-csg/connectal,cambridgehackers/connectal