From: Ian Lynagh <igloo@earth.li>
Date: Sat, 30 Aug 2008 19:26:19 +0000 (+0000)
Subject: Fix a space leak
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=105da4197baa8ed159ec71b65b6b64c6fcfc8bbb

Fix a space leak
---

diff --git a/compiler/rename/RnEnv.lhs b/compiler/rename/RnEnv.lhs
index 03e94bc..a0d323d 100644
--- a/compiler/rename/RnEnv.lhs
+++ b/compiler/rename/RnEnv.lhs
@@ -868,11 +868,9 @@ checkShadowedNames doc_str (global_env,local_env) loc_rdr_names
 \begin{code}
 -- A useful utility
 mapFvRn :: (a -> RnM (b, FreeVars)) -> [a] -> RnM ([b], FreeVars)
-mapFvRn f xs = mappM f xs	`thenM` \ stuff ->
-	       let
-		  (ys, fvs_s) = unzip stuff
-	       in
-	       returnM (ys, plusFVs fvs_s)
+mapFvRn f xs = do stuff <- mappM f xs
+                  case unzip stuff of
+                      (ys, fvs_s) -> returnM (ys, plusFVs fvs_s)
 
 -- because some of the rename functions are CPSed:
 -- maps the function across the list from left to right;