ASSERT( isId new_bndr )
WARN( new_arity < old_arity || new_arity < dmd_arity,
(ptext (sLit "Arity decrease:") <+> ppr final_id <+> ppr old_arity
ASSERT( isId new_bndr )
WARN( new_arity < old_arity || new_arity < dmd_arity,
(ptext (sLit "Arity decrease:") <+> ppr final_id <+> ppr old_arity