From 207f0082202fd822fe1d0d3083c7fff5de6d8847 Mon Sep 17 00:00:00 2001
From: Sergey Petrunya <psergey@askmonty.org>
Date: Tue, 15 Oct 2013 19:24:43 +0400
Subject: Fix valgrind failure caused by calling c_ptr() of an empty
 StringBuffer<N>.

---
 sql/sql_explain.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'sql/sql_explain.cc')

diff --git a/sql/sql_explain.cc b/sql/sql_explain.cc
index b9f75d3a97e..d20e2b2e4ef 100644
--- a/sql/sql_explain.cc
+++ b/sql/sql_explain.cc
@@ -903,7 +903,7 @@ int Explain_update::print_explain(Explain_query *query,
                     key_len_buf.length() ? key_len_buf.c_ptr() : NULL,
                     NULL, /* 'ref' is always NULL in single-table EXPLAIN DELETE */
                     &rows,
-                    extra_str.c_ptr());
+                    extra_str.c_ptr_safe());
 
   return print_explain_for_children(query, output, explain_flags);
 }
-- 
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