static bool convert_subq_to_jtbm(JOIN *parent_join, 

                                 Item_in_subselect *subq_pred, 

                                 bool *remove_item)

{

  SELECT_LEX *parent_lex= parent_join->select_lex;

  List<TABLE_LIST> *emb_join_list= &parent_lex->top_join_list;

  TABLE_LIST *emb_tbl_nest= NULL; // will change when we learn to handle outer joins

  TABLE_LIST *tl;

  bool *optimization_delayed= TRUE;*

...

  if (optimization_delayed)

  {

    DBUG_ASSERT(parent_join->table_count < MAX_TABLES);

    jtbm->jtbm_table_no= parent_join->table_count;

    create_subquery_temptable_name(&tbl_alias,

                                   subq_pred->unit->first_select()->select_number);

    jtbm->alias.str=    tbl_alias.str;

    jtbm->alias.length= tbl_alias.length;

    parent_join->table_count++;

    *DBUG_RETURN(thd->is_fatal_error);*    <== Always return here

  }

...

[code that is never executed]

}