diff options
Diffstat (limited to 'compiler/GHC/Tc/TyCl/PatSyn.hs')
| -rw-r--r-- | compiler/GHC/Tc/TyCl/PatSyn.hs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/GHC/Tc/TyCl/PatSyn.hs b/compiler/GHC/Tc/TyCl/PatSyn.hs index 7fd1f3677f..dad820674e 100644 --- a/compiler/GHC/Tc/TyCl/PatSyn.hs +++ b/compiler/GHC/Tc/TyCl/PatSyn.hs @@ -42,7 +42,7 @@ import GHC.Utils.Panic import GHC.Utils.Outputable import GHC.Data.FastString import GHC.Types.Var -import GHC.Types.Var.Env( emptyTidyEnv, mkInScopeSet ) +import GHC.Types.Var.Env( emptyTidyEnv, mkInScopeSetList ) import GHC.Types.Id import GHC.Types.Id.Info( RecSelParent(..) ) import GHC.Tc.Gen.Bind @@ -456,7 +456,7 @@ tcCheckPatSynDecl psb@PSB{ psb_id = lname@(L _ name), psb_args = details pushLevelAndCaptureConstraints $ tcExtendNameTyVarEnv univ_tv_prs $ tcCheckPat PatSyn lpat (unrestricted skol_pat_ty) $ - do { let in_scope = mkInScopeSet (mkVarSet skol_univ_tvs) + do { let in_scope = mkInScopeSetList skol_univ_tvs empty_subst = mkEmptyTCvSubst in_scope ; (inst_subst, ex_tvs') <- mapAccumLM newMetaTyVarX empty_subst skol_ex_tvs -- newMetaTyVarX: see the "Existential type variables" |