q

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

diff --git a/compiler/typecheck/Inst.lhs b/compiler/typecheck/Inst.lhs
index ffb0104..c34bf6d 100644 (file)
--- a/compiler/typecheck/Inst.lhs
+++ b/compiler/typecheck/Inst.lhs
@@ -110,7 +110,8 @@ instType imp@(ImplicInst {})      = mkImplicTy (tci_tyvars imp) (tci_given imp)
                                               (tci_wanted imp)
 
 mkImplicTy tvs givens wanteds  -- The type of an implication constraint
-  = -- pprTrace "mkImplicTy" (ppr givens) $
+  = ASSERT( all isDict givens )
+    -- pprTrace "mkImplicTy" (ppr givens) $
     mkForAllTys tvs $ 
     mkPhiTy (map dictPred givens) $
     if isSingleton wanteds then
@@ -330,6 +331,7 @@ mkPredName uniq loc pred_ty
     occ = case pred_ty of
            ClassP cls tys -> mkDictOcc (getOccName cls)
            IParam ip ty   -> getOccName (ipNameName ip)
+           EqPred _ _     -> pprPanic "mkPredName" (ppr pred_ty)
 \end{code}
 
 %************************************************************************