1 files changed, 2 insertions, 0 deletions
diff --git a/sql/item.cc b/sql/item.cc
index 925d44a481f..dc39755f63d 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -10108,6 +10108,8 @@ bool Item_cache_str::cache_value()
     value_buff.copy(*value);
     value= &value_buff;
   }
+  else
+    value_buff.copy();
   return TRUE;
 }