From 2f996f02174343ce766710fc6871e2e6df8e73c6 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Thu, 22 Jul 2010 15:48:57 +0200
Subject: [PATCH] defensive programming: set o->ptr to NULL before freeing
 objects

---
 src/object.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/object.c b/src/object.c
index 7abecfc64..51582619e 100644
--- a/src/object.c
+++ b/src/object.c
@@ -179,6 +179,7 @@ void decrRefCount(void *obj) {
         case REDIS_HASH: freeHashObject(o); break;
         default: redisPanic("Unknown object type"); break;
         }
+        o->ptr = NULL; /* defensive programming. We'll see NULL in traces. */
         if (server.vm_enabled) pthread_mutex_lock(&server.obj_freelist_mutex);
         if (listLength(server.objfreelist) > REDIS_OBJFREELIST_MAX ||
             !listAddNodeHead(server.objfreelist,o))