From dd7ac4680172ce2f2b23f877ecdd965ea2914968 Mon Sep 17 00:00:00 2001
From: unknown <sanja@askmonty.org>
Date: Tue, 11 Feb 2014 10:32:52 +0200
Subject: MDEV-5607: Query cache destroys uninitialized rwlock

Destroying rw_lock twice by resize() prevented.
---
 sql/sql_cache.cc | 1 +
 1 file changed, 1 insertion(+)

(limited to 'sql/sql_cache.cc')

diff --git a/sql/sql_cache.cc b/sql/sql_cache.cc
index 82f47f7c861..d558572f3a2 100644
--- a/sql/sql_cache.cc
+++ b/sql/sql_cache.cc
@@ -1326,6 +1326,7 @@ ulong Query_cache::resize(ulong query_cache_size_arg)
       query->unlock_n_destroy();
       block= block->next;
     } while (block != queries_blocks);
+    queries_blocks= NULL; // avoid second destroying by free_cache
   }
   free_cache();
 
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