Use explicit language extensions & remove extension fields from base.cabal

[ghc-base.git] / System / Environment.hs

diff --git a/System/Environment.hs b/System/Environment.hs
index 247a905..2b6dec2 100644 (file)
--- a/System/Environment.hs
+++ b/System/Environment.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE CPP, ForeignFunctionInterface #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  System.Environment
@@ -155,7 +157,8 @@ withArgv new_args act = do
   pName <- System.Environment.getProgName
   existing_args <- System.Environment.getArgs
   bracket (setArgs new_args)
-          (\argv -> do setArgs (pName:existing_args); freeArgv argv)
+          (\argv -> do _ <- setArgs (pName:existing_args)
+                       freeArgv argv)
           (const act)
 
 freeArgv :: Ptr CString -> IO ()