if (new_page_zip) {                                                     

                mtr_set_log_mode(mtr, log_mode);                                

                if (!page_zip_compress(new_page_zip,                            

                                       new_page,                                

                                       index,                                   

                                       page_zip_level,                          

                                       NULL, mtr)) {                            

                        /* Before trying to reorganize the page,                

                        store the number of preceding records on the page. */   

                        ulint   ret_pos                                         

                                = page_rec_get_n_recs_before(ret);              

                        /* Before copying, "ret" was the successor of           

                        the predefined infimum record.  It must still           

                        have at least one predecessor (the predefined           

                        infimum record, or a freshly copied record              

                        that is smaller than "ret"). */                         

                        ut_a(ret_pos > 0);                                      

                        if (!page_zip_reorganize(new_block, index, mtr)) {      

                                if (!page_zip_decompress(new_page_zip,          

                                                         new_page, FALSE)) {    

                                        ut_error;                               

                                }                                               

                                ut_ad(page_validate(new_page, index));          

                                if (heap) {                                     

                                        mem_heap_free(heap);                    

                                }                                               

                                return(NULL);                                   

                        } else {                                                

...                                                                             

                        }                                                       

                }                                                               

        }