addInsols :: WantedConstraints -> Bag Ct -> WantedConstraints
addInsols wc cts
  = wc { wc_insol = wc_insol wc `unionBags` cts }
addInsols :: WantedConstraints -> Bag Ct -> WantedConstraints
addInsols wc cts
  = wc { wc_insol = wc_insol wc `unionBags` cts }
addInsols wc cts
  = wc { wc_insol = wc_insol wc `unionBags` cts }