bindFreeVars (Rec prs)    = fvVarSet $ filterFV isLocalVar $
                                addBndrs (map fst prs)
                                     (mapUnionFV rhs_fvs prs)
bindFreeVars (Rec prs)    = fvVarSet $ filterFV isLocalVar $
                                addBndrs (map fst prs)
                                     (mapUnionFV rhs_fvs prs)
bindFreeVars (Rec prs)    = fvVarSet $ filterFV isLocalVar $
                                addBndrs (map fst prs)
                                     (mapUnionFV rhs_fvs prs)