MDEV-29977 Memory leak in row_log_table_apply_update

- InnoDB fails to free the persistent cursor for the clustered index
when InnoDB replays the update operation on the table that is
being rebuilt.

1 files changed, 18 insertions, 2 deletions

diff --git a/mysql-test/suite/innodb/r/innodb-table-online.result b/mysql-test/suite/innodb/r/innodb-table-online.result
index ea56ea41c87..d54b79b5da7 100644
--- a/mysql-test/suite/innodb/r/innodb-table-online.result
+++ b/mysql-test/suite/innodb/r/innodb-table-online.result
@@ -459,10 +459,26 @@ SET DEBUG_SYNC = 'now WAIT_FOR created';
 UPDATE t1 SET f = REPEAT('a', 20000);
 SET DEBUG_SYNC = 'now SIGNAL updated';
 connection con1;
-disconnect con1;
 connection default;
 DROP TABLE t1;
-SET DEBUG_SYNC = 'RESET';
+#
+# MDEV-29977  Memory leak in row_log_table_apply_update
+#
+CREATE TABLE t1(f1 longtext, f2 int, KEY(f1(1024)), KEY(f2, f1(20))) ENGINE=InnoDB;
+INSERT INTO t1 VALUES('a', 1);
+connection con1;
+set DEBUG_SYNC="innodb_inplace_alter_table_enter SIGNAL con_default WAIT_FOR con1_signal";
+ALTER TABLE t1 FORCE;
+connection default;
+SET DEBUG_SYNC="now WAIT_FOR con_default";
+UPDATE t1 SET f1 = NULL;
+UPDATE t1 SET f1 = REPEAT('b', 9000);
+SET DEBUG_SYNC="now SIGNAL con1_signal";
+connection con1;
+DROP TABLE t1;
+connection default;
+SET DEBUG_SYNC=RESET;
+disconnect con1;
 SET GLOBAL innodb_file_per_table = @global_innodb_file_per_table_orig;
 SET GLOBAL innodb_monitor_enable  = default;
 SET GLOBAL innodb_monitor_disable = default;