add a few assertions to file open/reads
add a few assertions to file open/reads

sdalton1/legion,chuckatkins/legion,sdalton1/legion,chuckatkins/legion,sdalton1/legion,sdalton1/legion,chuckatkins/legion,sdalton1/legion,chuckatkins/legion,StanfordLegion/legion,StanfordLegion/legion,chuckatkins/legion,StanfordLegion/legion,chuckatkins/legion,StanfordLegion/legion,StanfordLegion/legion,sdalton1/legion,chuckatkins/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion