table.cc:

  remove unneeded multitable_view assignment
sql_view.cc:
  fix potential memorry overrun in ref_array
  asssign multitable_view in time of view creation (BUG#12569)

sql/sql_view.cc

@@ -844,6 +844,9 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
                                                          view_tables);
       lex->select_lex.context.outer_context= 0;
       lex->select_lex.context.select_lex= table->select_lex;
+      lex->select_lex.select_n_having_items+=
+        table->select_lex->select_n_having_items;
+
       /* do not check privileges & hide errors for view underlyings */
       for (SELECT_LEX *sl= lex->all_selects_list;
            sl;
@@ -864,7 +867,11 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
 
       {
         if (view_tables->next_local)
+        {
           table->multitable_view= TRUE;
+          if (table->belong_to_view)
+           table->belong_to_view->multitable_view= TRUE;
+        }
         /* make nested join structure for view tables */
         NESTED_JOIN *nested_join;
         if (!(nested_join= table->nested_join=

sql/table.cc

@@ -1720,8 +1720,6 @@ void st_table_list::set_ancestor()
         */
         tbl->ancestor->set_ancestor();
       }
-      if (tbl->multitable_view)
-        multitable_view= TRUE;
     } while ((tbl= tbl->next_local));
 
     if (!multitable_view)