FIX Trac 1662: actually check for existentials in proc patterns

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

diff --git a/compiler/typecheck/TcArrows.lhs b/compiler/typecheck/TcArrows.lhs
index 8276bc8..52b22cf 100644 (file)
--- a/compiler/typecheck/TcArrows.lhs
+++ b/compiler/typecheck/TcArrows.lhs
@@ -60,7 +60,7 @@ tcProc pat cmd exp_ty
     do { ((exp_ty1, res_ty), coi) <- boxySplitAppTy exp_ty 
        ; ((arr_ty, arg_ty), coi1) <- boxySplitAppTy exp_ty1
        ; let cmd_env = CmdEnv { cmd_arr = arr_ty }
-       ; (pat', cmd') <- tcLamPat pat arg_ty (emptyRefinement, res_ty) $
+       ; (pat', cmd') <- tcProcPat pat arg_ty (emptyRefinement, res_ty) $
                          tcCmdTop cmd_env cmd []
         ; let res_coi = mkTransCoI coi (mkAppTyCoI exp_ty1 coi1 res_ty IdCo)
        ; return (pat', cmd', res_coi) 
@@ -206,7 +206,7 @@ tc_cmd env cmd@(HsLam (MatchGroup [L mtch_loc (match@(Match pats maybe_rhs_sig g
   where
     n_pats     = length pats
     stk'       = drop n_pats cmd_stk
-    match_ctxt = LambdaExpr    -- Maybe KappaExpr?
+    match_ctxt = (LambdaExpr :: HsMatchContext Name)   -- Maybe KappaExpr?
     pg_ctxt    = PatGuard match_ctxt
 
     tc_grhss (GRHSs grhss binds) res_ty