X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcInstDcls.lhs;h=4e40be31b91d71fda93d05334c07670c711d285e;hp=76ba66fd03b03242c64e68278c5409516fa924d3;hb=b10d7d079ec9c3fc22d4700fe484dd297bddb805;hpb=9a0d8e2bb7957e22f4555fb4f461bd71bd3bdca6

diff --git a/compiler/typecheck/TcInstDcls.lhs b/compiler/typecheck/TcInstDcls.lhs
index 76ba66f..4e40be3 100644
--- a/compiler/typecheck/TcInstDcls.lhs
+++ b/compiler/typecheck/TcInstDcls.lhs
@@ -33,7 +33,6 @@ import TyCon
 import DataCon
 import Class
 import Var
-import VarSet	  ( emptyVarSet )
 import CoreUtils  ( mkPiTypes )
 import CoreUnfold ( mkDFunUnfolding )
 import CoreSyn	  ( Expr(Var) )
@@ -638,7 +637,7 @@ tc_inst_decl2 dfun_id inst_binds
                                     mapAndUnzipM tc_sc (sc_sels `zip` sc_dicts)
 
 				    -- NOT FINISHED!
-       ; (_eq_sc_binds, sc_eq_vars) <- checkConstraints InstSkol emptyVarSet 
+       ; (_eq_sc_binds, sc_eq_vars) <- checkConstraints InstSkol
                                            inst_tyvars' dfun_ev_vars $
                                       emitWanteds ScOrigin sc_eqs
 
@@ -707,7 +706,7 @@ tcSuperClass tyvars dicts
              self_ev_bind@(EvBind self_dict _)
 	     (sc_sel, sc_pred)
   = do { (ev_binds, wanted, sc_dict)
-             <- newImplication InstSkol emptyVarSet tyvars dicts $
+             <- newImplication InstSkol tyvars dicts $
                 emitWanted ScOrigin sc_pred
 
        ; simplifySuperClass self_dict wanted
@@ -970,7 +969,7 @@ tcInstanceMethods dfun_id clas tyvars dfun_ev_vars inst_tys
 -- by the constraint solver, since the <context> may be
 -- user-specified.
 
-  = do { rep_d_stuff <- checkConstraints InstSkol emptyVarSet tyvars dfun_ev_vars $
+  = do { rep_d_stuff <- checkConstraints InstSkol tyvars dfun_ev_vars $
                         emitWanted ScOrigin rep_pred
                          
        ; mapAndUnzipM (tc_item rep_d_stuff) op_items }