Merge branch '11.2' into 11.3

mysql-test/suite/innodb/t/innodb-index-debug.test

@@ -6,6 +6,10 @@
 --source include/big_test.inc
 
 let $MYSQLD_DATADIR= `select @@datadir`;
+SET GLOBAL innodb_max_purge_lag_wait=0;
+connect (stop_purge,localhost,root);
+START TRANSACTION WITH CONSISTENT SNAPSHOT;
+connection default;
 
 #
 # Test for BUG# 12739098, check whether trx->error_status is reset on error.
@@ -155,6 +159,7 @@ SET DEBUG_SYNC='now SIGNAL log2';
 --connection con1
 reap;
 --disconnect con1
+--disconnect stop_purge
 --connection default
 SET DEBUG_SYNC='RESET';
 DROP TABLE t1;