FW: [commit: ghc] master: Add missing kind-check for tcEqType on forall-types (74894e0)
Austin, this one looks like a bug waiting to happen, so let's merge if time. Simon -----Original Message----- From: ghc-commits [mailto:ghc-commits-bounces@haskell.org] On Behalf Of git@git.haskell.org Sent: 24 March 2014 10:27 To: ghc-commits@haskell.org Subject: [commit: ghc] master: Add missing kind-check for tcEqType on forall-types (74894e0) Repository : ssh://git@git.haskell.org/ghc On branch : master Link : http://ghc.haskell.org/trac/ghc/changeset/74894e0bc405247092e865b9541f5f18d2...
---------------------------------------------------------------
commit 74894e0bc405247092e865b9541f5f18d26aa015
Author: Simon Peyton Jones
---------------------------------------------------------------
74894e0bc405247092e865b9541f5f18d26aa015 compiler/typecheck/TcType.lhs | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/compiler/typecheck/TcType.lhs b/compiler/typecheck/TcType.lhs index 9b58b4c..08c7a62 100644 --- a/compiler/typecheck/TcType.lhs +++ b/compiler/typecheck/TcType.lhs @@ -245,7 +245,6 @@ checking. It's attached to mutable type variables only. It's knot-tied back to Var.lhs. There is no reason in principle why Var.lhs shouldn't actually have the definition, but it "belongs" here. - Note [Signature skolems] ~~~~~~~~~~~~~~~~~~~~~~~~ Consider this @@ -1008,7 +1007,8 @@ tcEqType ty1 ty2 | Just t2' <- tcView t2 = go env t1 t2' go env (TyVarTy tv1) (TyVarTy tv2) = rnOccL env tv1 == rnOccR env tv2 go _ (LitTy lit1) (LitTy lit2) = lit1 == lit2 - go env (ForAllTy tv1 t1) (ForAllTy tv2 t2) = go (rnBndr2 env tv1 tv2) t1 t2 + go env (ForAllTy tv1 t1) (ForAllTy tv2 t2) = go env (tyVarKind tv1) (tyVarKind tv2) + && go (rnBndr2 env tv1 + tv2) t1 t2 go env (AppTy s1 t1) (AppTy s2 t2) = go env s1 s2 && go env t1 t2 go env (FunTy s1 t1) (FunTy s2 t2) = go env s1 s2 && go env t1 t2 go env (TyConApp tc1 ts1) (TyConApp tc2 ts2) = (tc1 == tc2) && gos env ts1 ts2 @@ -1027,7 +1027,8 @@ pickyEqType ty1 ty2 init_env = mkRnEnv2 (mkInScopeSet (tyVarsOfType ty1 `unionVarSet` tyVarsOfType ty2)) go env (TyVarTy tv1) (TyVarTy tv2) = rnOccL env tv1 == rnOccR env tv2 go _ (LitTy lit1) (LitTy lit2) = lit1 == lit2 - go env (ForAllTy tv1 t1) (ForAllTy tv2 t2) = go (rnBndr2 env tv1 tv2) t1 t2 + go env (ForAllTy tv1 t1) (ForAllTy tv2 t2) = go env (tyVarKind tv1) (tyVarKind tv2) + && go (rnBndr2 env tv1 + tv2) t1 t2 go env (AppTy s1 t1) (AppTy s2 t2) = go env s1 s2 && go env t1 t2 go env (FunTy s1 t1) (FunTy s2 t2) = go env s1 s2 && go env t1 t2 go env (TyConApp tc1 ts1) (TyConApp tc2 ts2) = (tc1 == tc2) && gos env ts1 ts2 _______________________________________________ ghc-commits mailing list ghc-commits@haskell.org http://www.haskell.org/mailman/listinfo/ghc-commits
participants (1)
-
Simon Peyton Jones