Fix Trac #1654: propagate name changes into CoreRules

[ghc-hetmet.git] / compiler / simplCore / SimplEnv.lhs

diff --git a/compiler/simplCore/SimplEnv.lhs b/compiler/simplCore/SimplEnv.lhs
index 294651a..e62c24f 100644 (file)
--- a/compiler/simplCore/SimplEnv.lhs
+++ b/compiler/simplCore/SimplEnv.lhs
@@ -659,7 +659,7 @@ addBndrRules env in_id out_id
   where
     subst     = mkCoreSubst env
     old_rules = idSpecialisation in_id
-    new_rules = CoreSubst.substSpec subst old_rules
+    new_rules = CoreSubst.substSpec subst out_id old_rules
     final_id  = out_id `setIdSpecialisation` new_rules
 
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