Fix typo in SpecConstr that made it not work at all

There was a terrible typo in this patch; I wrote "env"
instead of "env1".

   Mon Jan 31 11:35:29 GMT 2011  simonpj@microsoft.com
     * Improve Simplifier and SpecConstr behaviour

Anyway, this fix is essential to make it work properly.
Thanks to Max for spotting the problem (again).

diff --git a/compiler/specialise/SpecConstr.lhs b/compiler/specialise/SpecConstr.lhs
index 8e08169..8235196 100644 (file)
--- a/compiler/specialise/SpecConstr.lhs
+++ b/compiler/specialise/SpecConstr.lhs
@@ -749,7 +749,7 @@ extendCaseBndrs env scrut case_bndr con alt_bndrs
    live_case_bndr = not (isDeadBinder case_bndr)
    env1 | Var v <- scrut = extendValEnv env v cval
         | otherwise      = env -- See Note [Add scrutinee to ValueEnv too]
-   env2 | live_case_bndr = extendValEnv env case_bndr cval
+   env2 | live_case_bndr = extendValEnv env1 case_bndr cval
         | otherwise      = env1
 
    alt_bndrs' | case scrut of { Var {} -> True; _ -> live_case_bndr }