[project @ 2005-03-01 21:40:40 by simonpj]

[ghc-hetmet.git] / ghc / compiler / typecheck / TcPat.lhs

diff --git a/ghc/compiler/typecheck/TcPat.lhs b/ghc/compiler/typecheck/TcPat.lhs
index 9261ecb..208af13 100644 (file)
--- a/ghc/compiler/typecheck/TcPat.lhs
+++ b/ghc/compiler/typecheck/TcPat.lhs
@@ -25,7 +25,7 @@ import TcEnv          ( newLocalName, tcExtendIdEnv1, tcExtendTyVarEnv2,
                          tcLookupClass, tcLookupDataCon, tcLookupId )
 import TcMType                 ( newTyFlexiVarTy, arityErr, tcSkolTyVars, readMetaTyVar )
 import TcType          ( TcType, TcTyVar, TcSigmaType, TcTauType, zipTopTvSubst,
-                         SkolemInfo(PatSkol), isSkolemTyVar, isMetaTyVar, pprSkolemTyVar, 
+                         SkolemInfo(PatSkol), isSkolemTyVar, isMetaTyVar, pprTcTyVar, 
                          TvSubst, mkOpenTvSubst, substTyVar, substTy, MetaDetails(..),
                          mkTyVarTys, mkClassPred, mkTyConApp, isOverloadedTy )
 import VarEnv          ( mkVarEnv )    -- ugly
@@ -634,9 +634,7 @@ badTypePat pat = ptext SLIT("Illegal type pattern") <+> ppr pat
 lazyPatErr pat tvs
   = failWithTc $
     hang (ptext SLIT("A lazy (~) pattern connot bind existential type variables"))
-       2 (vcat (map get tvs))
-  where
-   get tv = ASSERT( isSkolemTyVar tv ) pprSkolemTyVar tv
+       2 (vcat (map pprTcTyVar tvs))
 
 inaccessibleAlt msg
   = hang (ptext SLIT("Inaccessible case alternative:")) 2 msg