function luaY.markupval(M,b,V)local Q=b.bl while Q and Q.nactvar>V do Q=Q.previous end if Q then Q.upval=true end end

function luaY:markupval(fs, level)
  local bl = fs.bl
  while bl and bl.nactvar > level do bl = bl.previous end
  if bl then bl.upval = true end
end
