From d05528b08dd9ef1043f4b24ecefbf0ec092048ed Mon Sep 17 00:00:00 2001
From: simonpj <unknown>
Date: Wed, 9 Oct 2002 15:15:59 +0000
Subject: [PATCH] [project @ 2002-10-09 15:15:59 by simonpj] Bale out if
 duplicate binders

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

diff --git a/ghc/compiler/typecheck/TcRnDriver.lhs b/ghc/compiler/typecheck/TcRnDriver.lhs
index 04b0ca3..10d0c35 100644
--- a/ghc/compiler/typecheck/TcRnDriver.lhs
+++ b/ghc/compiler/typecheck/TcRnDriver.lhs
@@ -658,6 +658,8 @@ rnTopSrcDecls group
 						  tcg_imports gbl }) 
 		     $ do {
 
+	failIfErrsM ;	-- No point in continuing if (say) we have duplicate declarations
+
 		-- Rename the source decls
 	(tcg_env, rn_src_decls, src_fvs) <- initRn SourceMode (rnSrcDecls group) ;
 	setGblEnv tcg_env $ do {
-- 
1.7.10.4