gcol.gcol_purge causes innodb.gap_lock test failure

./mtr --no-reorder gcol.gcol_purge innodb.gap_locks

[Revision hash: b52b7b41296fa8857bcd2abc42f9ab6721b86f8b]

innodb.gap_locks 'innodb'                w20 [ fail ]

        Test ended at 2023-11-06 15:06:15

CURRENT_TEST: innodb.gap_locks

--- /home/buildbot/amd64-ubuntu-2004-debug/build/mysql-test/suite/innodb/r/gap_locks.result	2023-11-06 14:50:37.000000000 +0000

+++ /home/buildbot/amd64-ubuntu-2004-debug/build/mysql-test/suite/innodb/r/gap_locks.reject	2023-11-06 15:06:14.843197996 +0000

@@ -8,28 +8,28 @@

 DELETE FROM t1 WHERE b='2' AND c=2;

 SHOW ENGINE INNODB STATUS;

 Type	Name	Status

-InnoDB		2 lock struct(s), 1 row lock(s)

+InnoDB		0 lock struct(s), 0 row lock(s)

 ROLLBACK;

 SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;

 BEGIN;

 DELETE FROM t1 WHERE b='2' AND c=2;

 SHOW ENGINE INNODB STATUS;

 Type	Name	Status

-InnoDB		2 lock struct(s), 1 row lock(s)

+InnoDB		0 lock struct(s), 0 row lock(s)

 ROLLBACK;

 SET TRANSACTION ISOLATION LEVEL READ COMMITTED;

 BEGIN;

 DELETE FROM t1 WHERE b='2' AND c=2;

 SHOW ENGINE INNODB STATUS;

 Type	Name	Status

-InnoDB		1 lock struct(s), 0 row lock(s)

+InnoDB		0 lock struct(s), 0 row lock(s)

 ROLLBACK;

 SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;

 BEGIN;

 DELETE FROM t1 WHERE b='2' AND c=2;

 SHOW ENGINE INNODB STATUS;

 Type	Name	Status

-InnoDB		1 lock struct(s), 0 row lock(s)

+InnoDB		0 lock struct(s), 0 row lock(s)

 ROLLBACK;

 SET GLOBAL INNODB_STATUS_OUTPUT_LOCKS = @save_locks;

 DROP TABLE t1;

mysqltest: Result content mismatch