From: Simon Marlow <marlowsd@gmail.com>
Date: Tue, 12 Apr 2011 08:41:01 +0000 (+0100)
Subject: isAlive: re-apply the tag if we find a forwarding pointer. This is a
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=4f018b471c7c5db858beb508b8430ae4d0621173

isAlive: re-apply the tag if we find a forwarding pointer. This is a
real bug, spotted by Marcin Orczyk (thanks!).  I'm not sure if it lead
to any actual crashes.
---

diff --git a/rts/sm/GCAux.c b/rts/sm/GCAux.c
index 7f3968f..12e106b 100644
--- a/rts/sm/GCAux.c
+++ b/rts/sm/GCAux.c
@@ -79,7 +79,7 @@ isAlive(StgClosure *p)
 
     if (IS_FORWARDING_PTR(info)) {
         // alive! 
-        return (StgClosure*)UN_FORWARDING_PTR(info);
+        return TAG_CLOSURE(tag,(StgClosure*)UN_FORWARDING_PTR(info));
     }
 
     info = INFO_PTR_TO_STRUCT(info);