item.cc:

  Fix for fix bug#12922.

sql/item.cc

@@ -1037,13 +1037,13 @@ void Item::split_sum_func2(THD *thd, Item **ref_pointer_array,
       Item_ref to allow fields from view being stored in tmp table.
     */
     uint el= fields.elements;
-    Item *new_item, *real_item= real_item();
+    Item *new_item, *real_itm= real_item();
 
-    ref_pointer_array[el]= real_item;
+    ref_pointer_array[el]= real_itm;
     if (!(new_item= new Item_ref(&thd->lex->current_select->context,
                                  ref_pointer_array + el, 0, name)))
       return;                                   // fatal_error is set
-    fields.push_front(real_item);
+    fields.push_front(real_itm);
     thd->change_item_tree(ref, new_item);
   }
 }