unwrap_ty res_pat
-- Add the stupid theta
- ; addDataConStupidTheta data_con ctxt_res_tys
+ ; setSrcSpan con_span $ addDataConStupidTheta data_con ctxt_res_tys
; ex_tvs' <- tcInstSkolTyVars skol_info ex_tvs
-- Get location from monad, not from ex_tvs