By Brian O’Connell Real Money Columnist Jonathan Heller’s crab bisque index is flashing a warning signal. Real Money Columnist Jonathan Heller has been looking back to the 1970s to gain some perspective of rising inflation rates these days. He’s using some familiar consumer products to take the measure of rising prices. “Recently, I have been served a couple of very stark reminders of the current state of the economy in terms of supply-chain issues and inflation,” Heller wrote on Real Money. First, Heller cited his failed attempt to secure a fairly common type of roofing shingle in order to co…