one_tuple_case chunk_vars (us, vs, body)
= let (us1, us2) = splitUniqSupply us
scrut_var = mkSysLocal (fsLit "ds") (uniqFromSupply us1)
one_tuple_case chunk_vars (us, vs, body)
= let (us1, us2) = splitUniqSupply us
scrut_var = mkSysLocal (fsLit "ds") (uniqFromSupply us1)