From 83a8fc9f6e04436784693a2188a58eac9c3e9664 Mon Sep 17 00:00:00 2001
From: "simonpj@microsoft.com" <unknown>
Date: Tue, 14 Sep 2010 11:39:00 +0000
Subject: [PATCH] Improve ASSERT

---
 compiler/iface/TcIface.lhs |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/iface/TcIface.lhs b/compiler/iface/TcIface.lhs
index 83a2458..fde3146 100644
--- a/compiler/iface/TcIface.lhs
+++ b/compiler/iface/TcIface.lhs
@@ -919,7 +919,7 @@ tcIfaceAlt scrut (tycon, inst_tys) (IfaceDataAlt data_occ, arg_strs, rhs)
 	; tcIfaceDataAlt con inst_tys arg_strs rhs }
 		  
 tcIfaceAlt _ (tycon, inst_tys) (IfaceTupleAlt _boxity, arg_occs, rhs)
-  = ASSERT( isTupleTyCon tycon )
+  = ASSERT2( isTupleTyCon tycon, ppr tycon )
     do	{ let [data_con] = tyConDataCons tycon
 	; tcIfaceDataAlt data_con inst_tys arg_occs rhs }
 
-- 
1.7.10.4