X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcBinds.lhs;h=a71da2e711bbab05d6665b11e399575a05c02180;hb=e6ca2d4ac1e3d86bd93e5884fbae03151c708862;hp=18c61917c2bbbf0f332972667e8dce41f778e96a;hpb=d49e38db67eaefa9c53356a9193c7a1e13a9b8f9;p=ghc-hetmet.git

diff --git a/compiler/typecheck/TcBinds.lhs b/compiler/typecheck/TcBinds.lhs
index 18c6191..a71da2e 100644
--- a/compiler/typecheck/TcBinds.lhs
+++ b/compiler/typecheck/TcBinds.lhs
@@ -26,7 +26,6 @@ import TcHsType
 import TcPat
 import TcMType
 import TcType
-import {- Kind parts of -} Type
 import Coercion
 import VarEnv
 import TysPrim
@@ -41,7 +40,6 @@ import Bag
 import ErrUtils
 import Digraph
 import Maybes
-import List
 import Util
 import BasicTypes
 import Outputable
@@ -807,7 +805,8 @@ unifyCtxts :: [TcSigInfo] -> TcM [Inst]
 -- Post-condition: the returned Insts are full zonked
 unifyCtxts [] = panic "unifyCtxts []"
 unifyCtxts (sig1 : sigs)        -- Argument is always non-empty
-  = do  { mapM unify_ctxt sigs
+  = do  { traceTc $ text "unifyCtxts" <+> ppr (sig1 : sigs)
+	; mapM_ unify_ctxt sigs
         ; theta <- zonkTcThetaType (sig_theta sig1)
         ; newDictBndrs (sig_loc sig1) theta }
   where
@@ -866,7 +865,7 @@ checkDistinctTyVars :: [TcTyVar] -> TcM [TcTyVar]
 
 checkDistinctTyVars sig_tvs
   = do  { zonked_tvs <- mapM zonkSigTyVar sig_tvs
-        ; foldlM check_dup emptyVarEnv (sig_tvs `zip` zonked_tvs)
+        ; foldlM_ check_dup emptyVarEnv (sig_tvs `zip` zonked_tvs)
         ; return zonked_tvs }
   where
     check_dup :: TyVarEnv TcTyVar -> (TcTyVar, TcTyVar) -> TcM (TyVarEnv TcTyVar)