handle None stmt_idx better
handle None stmt_idx better

iamahuman/angr,chubbymaggie/simuvex,chubbymaggie/angr,angr/angr,angr/simuvex,chubbymaggie/simuvex,zhuyue1314/simuvex,schieb/angr,axt/angr,schieb/angr,f-prettyland/angr,angr/angr,axt/angr,chubbymaggie/angr,f-prettyland/angr,tyb0807/angr,iamahuman/angr,chubbymaggie/angr,schieb/angr,tyb0807/angr,iamahuman/angr,angr/angr,f-prettyland/angr,chubbymaggie/simuvex,tyb0807/angr,axt/angr