Assertion `0' failed in row_sel_get_clust_rec_for_mysql

Problem hit during RQG testing on

10.4.7 commit 819c40d694071e56adb62ded97561717edb59f23 2019-07-22

10.4.7 showed that problem in minimum already ~ 2019-07-15.

2019-07-22 18:28:23 24 [ERROR] InnoDB: Clustered record for sec rec not found index `col_int` of table `test`.`t1`

InnoDB: sec index record PHYSICAL RECORD: n_fields 2; compact format; info bits 0

 0: SQL NULL;

|  1: len 4; hex 80000004; asc     ;;

 | 

 InnoDB: clust index record PHYSICAL RECORD: n_fields 73; compact format; info bits 32

|  0: len 4; hex 80000003; asc     ;;

|  1: len 6; hex 0000000015f8; asc       ;;

|  2: len 7; hex 31000001851961; asc 1     a;;

|  3: len 4; hex 80000002; asc     ;;

|  4: len 4; hex ffffffff; asc     ;;

|  5: SQL NULL;

|  6: SQL NULL;

....

|  72: SQL NULL;

# 2019-07-22T18:28:34 [208245] | TRANSACTION 5624, ACTIVE 0 sec fetching rows

# 2019-07-22T18:28:34 [208245] | mysql tables in use 1, locked 1

# 2019-07-22T18:28:34 [208245] | 3 lock struct(s), heap size 1160, 5 row lock(s), undo log entries 2

# 2019-07-22T18:28:34 [208245] | MySQL thread id 24, OS thread handle 140235059529472, query id 2900 localhost 127.0.0.1 root Updating

# 2019-07-22T18:28:34 [208245] | DELETE FROM t1 WHERE col_int = 5 OR col_int IS NULL  /* E_R Thread9 QNO 2263 CON_ID 24 */

....

| mysqld: torage/innobase/row/row0sel.cc:3356: dberr_t row_sel_get_clust_rec_for_mysql(row_prebuilt_t*, dict_index_t*, const rec_t*, que_thr_t*, const rec_t**, ulint**, mem_heap_t**, dtuple_t**, mtr_t*): Assertion `0' failed.

| 190722 18:28:23 [ERROR] mysqld got signal 6 ;