X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypes%2FType.lhs;h=d5c00e80704c35d0b4031b5a08998b854c2fc8cf;hp=67b58a37269e0fb3ccafe2abbbd357fd0da1a569;hb=c26717e6713bf1037a065ae5d89f98b109f87fab;hpb=72d043c04c1b0db0896e2c876a1544434f0428ec

diff --git a/compiler/types/Type.lhs b/compiler/types/Type.lhs
index 67b58a37..d5c00e8 100644
--- a/compiler/types/Type.lhs
+++ b/compiler/types/Type.lhs
@@ -1272,11 +1272,9 @@ mkOpenTvSubst env = TvSubst (mkInScopeSet (tyVarsOfTypes (varEnvElts env))) env
 
 zipOpenTvSubst :: [TyVar] -> [Type] -> TvSubst
 zipOpenTvSubst tyvars tys 
-#ifdef DEBUG
-  | length tyvars /= length tys
+  | debugIsOn && (length tyvars /= length tys)
   = pprTrace "zipOpenTvSubst" (ppr tyvars $$ ppr tys) emptyTvSubst
   | otherwise
-#endif
   = TvSubst (mkInScopeSet (tyVarsOfTypes tys)) (zipTyEnv tyvars tys)
 
 -- mkTopTvSubst is called when doing top-level substitutions.
@@ -1287,20 +1285,16 @@ mkTopTvSubst prs = TvSubst emptyInScopeSet (mkVarEnv prs)
 
 zipTopTvSubst :: [TyVar] -> [Type] -> TvSubst
 zipTopTvSubst tyvars tys 
-#ifdef DEBUG
-  | length tyvars /= length tys
+  | debugIsOn && (length tyvars /= length tys)
   = pprTrace "zipTopTvSubst" (ppr tyvars $$ ppr tys) emptyTvSubst
   | otherwise
-#endif
   = TvSubst emptyInScopeSet (zipTyEnv tyvars tys)
 
 zipTyEnv :: [TyVar] -> [Type] -> TvSubstEnv
 zipTyEnv tyvars tys
-#ifdef DEBUG
-  | length tyvars /= length tys
+  | debugIsOn && (length tyvars /= length tys)
   = pprTrace "mkTopTvSubst" (ppr tyvars $$ ppr tys) emptyVarEnv
   | otherwise
-#endif
   = zip_ty_env tyvars tys emptyVarEnv
 
 -- Later substitutions in the list over-ride earlier ones,