From 0cf6f8c36250e64b5b2bdf0bd6ed10e71984becc Mon Sep 17 00:00:00 2001
From: simonpj <unknown>
Date: Tue, 9 Nov 2004 17:38:01 +0000
Subject: [PATCH] [project @ 2004-11-09 17:38:01 by simonpj] Remember to zonk
 the quantified type variables of a for-all type before
 forming the type

---
 ghc/compiler/typecheck/TcRnDriver.lhs |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ghc/compiler/typecheck/TcRnDriver.lhs b/ghc/compiler/typecheck/TcRnDriver.lhs
index 02b586a..676792b 100644
--- a/ghc/compiler/typecheck/TcRnDriver.lhs
+++ b/ghc/compiler/typecheck/TcRnDriver.lhs
@@ -84,7 +84,7 @@ import TcHsSyn		( mkHsLet, zonkTopLExpr, zonkTopBndrs )
 import TcHsType		( kcHsType )
 import TcExpr		( tcCheckRho )
 import TcIface		( loadImportedInsts )
-import TcMType		( zonkTcType )
+import TcMType		( zonkTcType, zonkQuantifiedTyVar )
 import TcUnify		( unifyTyConApp )
 import TcMatches	( tcStmtsAndThen, TcStmtCtxt(..) )
 import TcSimplify	( tcSimplifyInteractive, tcSimplifyInfer )
@@ -903,8 +903,9 @@ tcRnExpr hsc_env ictxt rdr_expr
     ((tc_expr, res_ty), lie)	   <- getLIE (tcInferRho rn_expr) ;
     ((qtvs, _, dict_ids), lie_top) <- getLIE (tcSimplifyInfer smpl_doc (tyVarsOfType res_ty) lie)  ;
     tcSimplifyInteractive lie_top ;
+    qtvs' <- mappM zonkQuantifiedTyVar qtvs ;
 
-    let { all_expr_ty = mkForAllTys qtvs 		$
+    let { all_expr_ty = mkForAllTys qtvs' $
     		        mkFunTys (map idType dict_ids)	$
     		        res_ty } ;
     zonkTcType all_expr_ty
-- 
1.7.10.4