MDEV-21360 restore debud_dbug through a session variable instead of '-d,..'bb-10.2-MDEV-21360

23 files changed, 228 insertions, 237 deletions

diff --git a/mysql-test/extra/rpl_tests/rpl_binlog_errors.inc b/mysql-test/extra/rpl_tests/rpl_binlog_errors.inc
index 49ab4f386bf..097239f78d4 100644
--- a/mysql-test/extra/rpl_tests/rpl_binlog_errors.inc
+++ b/mysql-test/extra/rpl_tests/rpl_binlog_errors.inc
@@ -84,14 +84,14 @@ FLUSH LOGS;
 ###            (should show just one binlog)
 
 RESET MASTER;
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 -- error ER_NO_UNIQUE_LOGFILE
 FLUSH LOGS;
 -- echo # assert: must show one binlog
 -- source include/show_binary_logs.inc
 
 ### ACTION: clean up and move to next test
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 RESET MASTER;
 
 -- echo ###################### TEST #3
@@ -116,7 +116,7 @@ RESET MASTER;
 -- source include/show_binary_logs.inc
 
 # clean up the table and the binlog to be used in next part of test
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 
@@ -127,7 +127,7 @@ RESET MASTER;
 ###            changes performed despite the fact that it reported an
 ###            error.
 
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 -- replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
 -- error ER_NO_UNIQUE_LOGFILE
 -- eval LOAD DATA INFILE '$load_file' INTO TABLE t2
@@ -137,7 +137,7 @@ SET GLOBAL debug_dbug="+d,error_unique_log_filename";
 SELECT count(*) FROM t2;
 
 # clean up the table and the binlog to be used in next part of test
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 
@@ -146,7 +146,7 @@ RESET MASTER;
 ### ASSERTION: load the small file into a transactional table and
 ###            check that it succeeds
 
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 -- replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
 -- eval LOAD DATA INFILE '$load_file2' INTO TABLE t2
 
@@ -155,7 +155,7 @@ SET GLOBAL debug_dbug="+d,error_unique_log_filename";
 SELECT count(*) FROM t2;
 
 # clean up the table and the binlog to be used in next part of test
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 
@@ -166,7 +166,7 @@ RESET MASTER;
 ###            fails we get the error. Transaction is not rolledback
 ###            because rotation happens after the commit.
 
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 SET AUTOCOMMIT=0;
 INSERT INTO t2 VALUES ('muse');
 -- replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
@@ -181,7 +181,7 @@ SELECT count(*) FROM t2;
 
 ### ACTION: clean up and move to the next test 
 SET AUTOCOMMIT= 1;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 
@@ -191,7 +191,7 @@ RESET MASTER;
 ###            fails then an error is reported and an incident event
 ###            is written to the current binary log.
 
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 
 # Disable logging Annotate_rows events to preserve events count.
 let $binlog_annotate_row_events_saved= `SELECT @@binlog_annotate_row_events`;
@@ -206,7 +206,7 @@ SELECT count(*) FROM t4;
 SELECT count(*) FROM t4;
 
 -- echo ### check that the incident event is written to the current log
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 if (!$binlog_limit)
 {
     -- let $binlog_limit= 4,1
@@ -227,7 +227,7 @@ RESET MASTER;
 ### ASSERTION: check that statements end up in error but they succeed
 ###            on changing the data. 
 
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 -- echo # must show 0 entries
 SELECT count(*) FROM t4;
 SELECT count(*) FROM t2;
@@ -258,13 +258,13 @@ SELECT count(*) FROM t4;
 SELECT count(*) FROM t2;
 
 # remove fault injection
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 
 -- echo ###################### TEST #9
 
 ### ASSERTION: check that if we disable binlogging, then statements
 ###            succeed.
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 SET SQL_LOG_BIN=0;
 INSERT INTO t2 VALUES ('aaa'), ('bbb'), ('ccc'), ('ddd');
 INSERT INTO t4 VALUES ('eee'), ('fff'), ('ggg'), ('hhh');
@@ -277,7 +277,7 @@ DELETE FROM t4;
 SELECT count(*) FROM t2;
 SELECT count(*) FROM t4;
 SET SQL_LOG_BIN=1;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 
 -- echo ###################### TEST #10
 
@@ -292,11 +292,11 @@ RESET MASTER;
 SHOW WARNINGS;
 
 # +d,fault_injection_registering_index => injects fault on MYSQL_BIN_LOG::open
-SET GLOBAL debug_dbug="+d,fault_injection_registering_index";
+SET @@global.debug_dbug="d,fault_injection_registering_index";
 -- replace_regex /\.[\\\/]master/master/
 -- error ER_CANT_OPEN_FILE
 FLUSH LOGS;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 
 -- error ER_NO_BINARY_LOGGING
 SHOW BINARY LOGS;
@@ -321,11 +321,11 @@ flush tables;
 --source include/rpl_restart_server.inc
 
 # +d,fault_injection_openning_index => injects fault on MYSQL_BIN_LOG::open_index_file
-SET GLOBAL debug_dbug="+d,fault_injection_openning_index";
+SET @@global.debug_dbug="d,fault_injection_openning_index";
 -- replace_regex /\.[\\\/]master/master/
 -- error ER_CANT_OPEN_FILE
 FLUSH LOGS;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 
 -- error ER_FLUSH_MASTER_BINLOG_CLOSED
 RESET MASTER;
@@ -350,10 +350,10 @@ flush tables;
 ###            file.
 
 # +d,fault_injection_new_file_rotate_event => injects fault on MYSQL_BIN_LOG::MYSQL_BIN_LOG::new_file_impl
-SET GLOBAL debug_dbug="+d,fault_injection_new_file_rotate_event";
+SET @@global.debug_dbug="d,fault_injection_new_file_rotate_event";
 -- error ER_ERROR_ON_WRITE
 FLUSH LOGS;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 
 -- error ER_FLUSH_MASTER_BINLOG_CLOSED
 RESET MASTER;
diff --git a/mysql-test/extra/rpl_tests/rpl_corruption.inc b/mysql-test/extra/rpl_tests/rpl_corruption.inc
index 4106bb45eef..c7a913af9d7 100644
--- a/mysql-test/extra/rpl_tests/rpl_corruption.inc
+++ b/mysql-test/extra/rpl_tests/rpl_corruption.inc
@@ -73,8 +73,8 @@ while ($i) {
 
 # Emulate corruption in binlog file when SHOW BINLOG EVENTS is executing
 --echo # 2. Corruption in master binlog and SHOW BINLOG EVENTS
-set @saved_dbug = @@global.debug_dbug;
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event_char";
+SET @saved_dbug = @@global.debug_dbug;
+SET @@global.debug_dbug="d,corrupt_read_log_event_char";
 --echo SHOW BINLOG EVENTS;
 --disable_query_log
 send_eval SHOW BINLOG EVENTS FROM $pos;
@@ -82,7 +82,7 @@ send_eval SHOW BINLOG EVENTS FROM $pos;
 --error ER_ERROR_WHEN_EXECUTING_COMMAND
 reap;
 
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event_char";
+SET @@global.debug_dbug=@saved_dbug;
 
 # Emulate corruption on master with crc checking on master
 --echo # 3. Master read a corrupted event from binlog and send the error to slave
@@ -107,20 +107,20 @@ let $wait_condition=
   SELECT COUNT(*)=0 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE command = 'Binlog Dump';
 --source include/wait_condition.inc
 
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug="d,corrupt_read_log_event2_set";
 --connection slave
 START SLAVE IO_THREAD;
 let $slave_io_errno= 1236;
 --let $slave_timeout= 10
 --source include/wait_for_slave_io_error.inc
 --connection master
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug=@saved_dbug;
 
 # Emulate corruption on master without crc checking on master
 --echo # 4. Master read a corrupted event from binlog and send it to slave
 --connection master
 SET GLOBAL master_verify_checksum=0;
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug="d,corrupt_read_log_event2_set";
 --connection slave
 START SLAVE IO_THREAD;
 # When the checksum error is detected, the slave sets error code 1743
@@ -130,31 +130,29 @@ START SLAVE IO_THREAD;
 let $slave_io_errno= 1595,1743; # ER_SLAVE_RELAY_LOG_WRITE_FAILURE, ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE
 --source include/wait_for_slave_io_error.inc
 --connection master
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event2_set";
-SET GLOBAL debug_dbug=@saved_dbug;
+SET @@global.debug_dbug=@saved_dbug;
 SET GLOBAL master_verify_checksum=1;
 
 # Emulate corruption in network
 --echo # 5. Slave. Corruption in network
 --connection slave
 SET @saved_dbug_slave = @@GLOBAL.debug_dbug;
-SET GLOBAL debug_dbug="+d,corrupt_queue_event";
+SET @@global.debug_dbug="d,corrupt_queue_event";
 START SLAVE IO_THREAD;
 let $slave_io_errno= 1595,1743; # ER_SLAVE_RELAY_LOG_WRITE_FAILURE, ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE
 --source include/wait_for_slave_io_error.inc
-SET GLOBAL debug_dbug="-d,corrupt_queue_event";
+SET @@global.debug_dbug=@saved_dbug_slave;
 
 # Emulate corruption in relay log
 --echo # 6. Slave. Corruption in relay log
 
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event_char";
+SET @@global.debug_dbug="d,corrupt_read_log_event_char";
 
 START SLAVE SQL_THREAD;
 let $slave_sql_errno= 1593;
 --source include/wait_for_slave_sql_error.inc
 
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event_char";
-SET GLOBAL debug_dbug=@saved_dbug_slave;
+SET @@global.debug_dbug=@saved_dbug_slave;
 
 # Start normal replication and compare same table on master
 # and slave
diff --git a/mysql-test/extra/rpl_tests/rpl_get_master_version_and_clock.test b/mysql-test/extra/rpl_tests/rpl_get_master_version_and_clock.test
index eb0e5e21d62..181759283e2 100644
--- a/mysql-test/extra/rpl_tests/rpl_get_master_version_and_clock.test
+++ b/mysql-test/extra/rpl_tests/rpl_get_master_version_and_clock.test
@@ -41,8 +41,8 @@ if (!$debug_sync_action)
 
 # Restart slave
 --source include/stop_slave.inc
-
-eval SET @@global.debug_dbug= "+d,$dbug_sync_point";
+SET @old_dbug = @@global.debug_dbug;
+eval SET @@global.debug_dbug= "d,$dbug_sync_point";
 
 --source include/start_slave.inc
 --echo slave is going to hang in get_master_version_and_clock
@@ -70,7 +70,7 @@ source include/wait_for_slave_io_error.inc;
 # now to avoid restarting IO-thread to re-enter it.
 # There will be a new IO thread forked out with its @@session.debug
 # unset.
-eval set @@global.debug_dbug= "-d,$dbug_sync_point";
+set @@global.debug_dbug= @old_dbug;
 
 --let $rpl_server_number= 1
 --source include/rpl_start_server.inc
diff --git a/mysql-test/extra/rpl_tests/rpl_stop_middle_group.test b/mysql-test/extra/rpl_tests/rpl_stop_middle_group.test
index 5c88c14d9b5..ac01fb04d16 100644
--- a/mysql-test/extra/rpl_tests/rpl_stop_middle_group.test
+++ b/mysql-test/extra/rpl_tests/rpl_stop_middle_group.test
@@ -14,7 +14,7 @@ create table ti (a int auto_increment primary key) engine=innodb;
 
 sync_slave_with_master;
 SET @saved_dbug = @@GLOBAL.debug_dbug;
-set @@global.debug_dbug="+d,stop_slave_middle_group";
+set @@global.debug_dbug="d,stop_slave_middle_group";
 
 connection master;
 
@@ -44,7 +44,7 @@ eval SELECT "NO$error" AS Last_SQL_Error, @check as `true`;
 select count(*) as one from tm;
 select count(*) as one from ti;
 
-set @@global.debug_dbug="-d";
+set @@global.debug_dbug=@saved_dbug;
 
 #
 # bug#45940 issues around rli->last_event_start_time
@@ -68,8 +68,7 @@ truncate table ti;
 #connection slave;
 sync_slave_with_master;
 
-set @@global.debug_dbug="+d,stop_slave_middle_group";
-set @@global.debug_dbug="+d,incomplete_group_in_relay_log";
+set @@global.debug_dbug="d,stop_slave_middle_group,incomplete_group_in_relay_log";
 
 connection master;
 
@@ -97,7 +96,7 @@ eval SELECT "$error" AS Last_SQL_Error, @check as `true`;
 select count(*) as one  from tm;
 select count(*) as zero from ti;
 
-set @@global.debug_dbug="-d";
+set @@global.debug_dbug=@saved_dbug;
 
 #
 # The mixed multi-table update
@@ -110,8 +109,7 @@ connection master;
 
 #connection slave;
 sync_slave_with_master;
-set @@global.debug_dbug="+d,stop_slave_middle_group";
-set @@global.debug_dbug="+d,incomplete_group_in_relay_log";
+set @@global.debug_dbug="d,stop_slave_middle_group,incomplete_group_in_relay_log";
 
 connection master;
 update tm as t1, ti as t2 set t1.a=t1.a * 2, t2.a=t2.a * 2;
diff --git a/mysql-test/include/io_thd_fault_injection.inc b/mysql-test/include/io_thd_fault_injection.inc
index 11479b3a66c..67b41371913 100644
--- a/mysql-test/include/io_thd_fault_injection.inc
+++ b/mysql-test/include/io_thd_fault_injection.inc
@@ -1,20 +1,19 @@
 #
 #  Takes the flag as an argument:
-#  -- let $io_thd_injection_fault_flag=+d,fault_injection_new_file_rotate_event
+#  -- let $io_thd_injection_fault_flag=d,fault_injection_new_file_rotate_event
 #  -- source include/io_thd_fault_injection.inc
 #
 
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 -- disable_warnings
 -- source include/stop_slave.inc 
 -- enable_warnings
--- eval SET GLOBAL debug_dbug="+d,$io_thd_injection_fault_flag"
+-- eval SET @@global.debug_dbug="d,$io_thd_injection_fault_flag"
 
 START SLAVE io_thread;
 -- source include/wait_for_slave_io_error.inc
 
--- eval SET GLOBAL debug_dbug="-d,$io_thd_injection_fault_flag"
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 
 # restart because slave is in bad shape
 --let $rpl_server_number= 2
diff --git a/mysql-test/suite/binlog_encryption/rpl_binlog_errors.result b/mysql-test/suite/binlog_encryption/rpl_binlog_errors.result
index 06be72d523b..32b158e7041 100644
--- a/mysql-test/suite/binlog_encryption/rpl_binlog_errors.result
+++ b/mysql-test/suite/binlog_encryption/rpl_binlog_errors.result
@@ -22,7 +22,7 @@ master-bin.000001	#
 master-bin.000002	#
 ###################### TEST #2
 RESET MASTER;
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 FLUSH LOGS;
 ERROR HY000: Can't generate a unique log-filename master-bin.(1-999)
 
@@ -30,7 +30,7 @@ ERROR HY000: Can't generate a unique log-filename master-bin.(1-999)
 show binary logs;
 Log_name	File_size
 master-bin.000001	#
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 RESET MASTER;
 ###################### TEST #3
 CREATE TABLE t1 (a INT);
@@ -44,11 +44,11 @@ show binary logs;
 Log_name	File_size
 master-bin.000001	#
 master-bin.000002	#
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 ###################### TEST #4
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/bug_46166.data' INTO TABLE t2;
 ERROR HY000: Can't generate a unique log-filename master-bin.(1-999)
 
@@ -56,21 +56,21 @@ ERROR HY000: Can't generate a unique log-filename master-bin.(1-999)
 SELECT count(*) FROM t2;
 count(*)
 1
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 ###################### TEST #5
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/bug_46166-2.data' INTO TABLE t2;
 # assert: must show one entry
 SELECT count(*) FROM t2;
 count(*)
 1
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 ###################### TEST #6
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 SET AUTOCOMMIT=0;
 INSERT INTO t2 VALUES ('muse');
 LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/bug_46166.data' INTO TABLE t2;
@@ -83,11 +83,11 @@ SELECT count(*) FROM t2;
 count(*)
 3
 SET AUTOCOMMIT= 1;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 ###################### TEST #7
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 SET @@binlog_annotate_row_events= 0;
 SELECT count(*) FROM t4;
 count(*)
@@ -100,14 +100,14 @@ SELECT count(*) FROM t4;
 count(*)
 1
 ### check that the incident event is written to the current log
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 include/show_binlog_events.inc
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Incident	#	#	#1 (LOST_EVENTS)
 DELETE FROM t4;
 RESET MASTER;
 ###################### TEST #8
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 # must show 0 entries
 SELECT count(*) FROM t4;
 count(*)
@@ -147,9 +147,9 @@ count(*)
 SELECT count(*) FROM t2;
 count(*)
 0
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 ###################### TEST #9
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 SET SQL_LOG_BIN=0;
 INSERT INTO t2 VALUES ('aaa'), ('bbb'), ('ccc'), ('ddd');
 INSERT INTO t4 VALUES ('eee'), ('fff'), ('ggg'), ('hhh');
@@ -170,17 +170,17 @@ SELECT count(*) FROM t4;
 count(*)
 0
 SET SQL_LOG_BIN=1;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 ###################### TEST #10
 call mtr.add_suppression("MYSQL_BIN_LOG::open failed to sync the index file.");
 call mtr.add_suppression("Could not open .*");
 RESET MASTER;
 SHOW WARNINGS;
 Level	Code	Message
-SET GLOBAL debug_dbug="+d,fault_injection_registering_index";
+SET @@global.debug_dbug="d,fault_injection_registering_index";
 FLUSH LOGS;
 ERROR HY000: Can't open file: 'master-bin.000002' (errno: 1 "Operation not permitted")
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 SHOW BINARY LOGS;
 ERROR HY000: You are not using binary logging
 CREATE TABLE t5 (a INT);
@@ -192,10 +192,10 @@ DROP TABLE t5;
 flush tables;
 ###################### TEST #11
 include/rpl_restart_server.inc [server_number=1]
-SET GLOBAL debug_dbug="+d,fault_injection_openning_index";
+SET @@global.debug_dbug="d,fault_injection_openning_index";
 FLUSH LOGS;
 ERROR HY000: Can't open file: 'master-bin.index' (errno: 1 "Operation not permitted")
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 RESET MASTER;
 ERROR HY000: Binlog closed, cannot RESET MASTER
 CREATE TABLE t5 (a INT);
@@ -207,10 +207,10 @@ DROP TABLE t5;
 flush tables;
 include/rpl_restart_server.inc [server_number=1]
 ###################### TEST #12
-SET GLOBAL debug_dbug="+d,fault_injection_new_file_rotate_event";
+SET @@global.debug_dbug="d,fault_injection_new_file_rotate_event";
 FLUSH LOGS;
 ERROR HY000: Can't open file: 'master-bin' (errno: 2 "No such file or directory")
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 RESET MASTER;
 ERROR HY000: Binlog closed, cannot RESET MASTER
 CREATE TABLE t5 (a INT);
@@ -237,44 +237,40 @@ call mtr.add_suppression("Could not open .*");
 call mtr.add_suppression("MYSQL_BIN_LOG::open failed to sync the index file.");
 call mtr.add_suppression("Can't generate a unique log-filename .*");
 ###################### TEST #13
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 START SLAVE io_thread;
 include/wait_for_slave_io_error.inc [errno=1595]
 Last_IO_Error = 'Relay log write failure: could not queue event from master'
-SET GLOBAL debug_dbug="-d,error_unique_log_filename";
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 include/rpl_restart_server.inc [server_number=2]
 ###################### TEST #14
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,fault_injection_new_file_rotate_event";
+SET @@global.debug_dbug="d,fault_injection_new_file_rotate_event";
 START SLAVE io_thread;
 include/wait_for_slave_io_error.inc [errno=1595]
 Last_IO_Error = 'Relay log write failure: could not queue event from master'
-SET GLOBAL debug_dbug="-d,fault_injection_new_file_rotate_event";
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 include/rpl_restart_server.inc [server_number=2]
 ###################### TEST #15
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,fault_injection_registering_index";
+SET @@global.debug_dbug="d,fault_injection_registering_index";
 START SLAVE io_thread;
 include/wait_for_slave_io_error.inc [errno=1595]
 Last_IO_Error = 'Relay log write failure: could not queue event from master'
-SET GLOBAL debug_dbug="-d,fault_injection_registering_index";
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 include/rpl_restart_server.inc [server_number=2]
 ###################### TEST #16
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,fault_injection_openning_index";
+SET @@global.debug_dbug="d,fault_injection_openning_index";
 START SLAVE io_thread;
 include/wait_for_slave_io_error.inc [errno=1595]
 Last_IO_Error = 'Relay log write failure: could not queue event from master'
-SET GLOBAL debug_dbug="-d,fault_injection_openning_index";
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 include/rpl_restart_server.inc [server_number=2]
 include/stop_slave_sql.inc
 Warnings:
diff --git a/mysql-test/suite/binlog_encryption/rpl_corruption.result b/mysql-test/suite/binlog_encryption/rpl_corruption.result
index f32b7c58ad1..73bb373d6be 100644
--- a/mysql-test/suite/binlog_encryption/rpl_corruption.result
+++ b/mysql-test/suite/binlog_encryption/rpl_corruption.result
@@ -13,42 +13,40 @@ connection master;
 CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY, b VARCHAR(10), c VARCHAR(100));
 include/stop_slave.inc
 # 2. Corruption in master binlog and SHOW BINLOG EVENTS
-set @saved_dbug = @@global.debug_dbug;
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event_char";
+SET @saved_dbug = @@global.debug_dbug;
+SET @@global.debug_dbug="d,corrupt_read_log_event_char";
 SHOW BINLOG EVENTS;
 ERROR HY000: Error when executing command SHOW BINLOG EVENTS: Wrong offset or I/O error
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event_char";
+SET @@global.debug_dbug=@saved_dbug;
 # 3. Master read a corrupted event from binlog and send the error to slave
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug="d,corrupt_read_log_event2_set";
 connection slave;
 START SLAVE IO_THREAD;
 include/wait_for_slave_io_error.inc [errno=1236]
 connection master;
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug=@saved_dbug;
 # 4. Master read a corrupted event from binlog and send it to slave
 connection master;
 SET GLOBAL master_verify_checksum=0;
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug="d,corrupt_read_log_event2_set";
 connection slave;
 START SLAVE IO_THREAD;
 include/wait_for_slave_io_error.inc [errno=1595,1743]
 connection master;
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event2_set";
-SET GLOBAL debug_dbug=@saved_dbug;
+SET @@global.debug_dbug=@saved_dbug;
 SET GLOBAL master_verify_checksum=1;
 # 5. Slave. Corruption in network
 connection slave;
 SET @saved_dbug_slave = @@GLOBAL.debug_dbug;
-SET GLOBAL debug_dbug="+d,corrupt_queue_event";
+SET @@global.debug_dbug="d,corrupt_queue_event";
 START SLAVE IO_THREAD;
 include/wait_for_slave_io_error.inc [errno=1595,1743]
-SET GLOBAL debug_dbug="-d,corrupt_queue_event";
+SET @@global.debug_dbug=@saved_dbug_slave;
 # 6. Slave. Corruption in relay log
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event_char";
+SET @@global.debug_dbug="d,corrupt_read_log_event_char";
 START SLAVE SQL_THREAD;
 include/wait_for_slave_sql_error.inc [errno=1593]
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event_char";
-SET GLOBAL debug_dbug=@saved_dbug_slave;
+SET @@global.debug_dbug=@saved_dbug_slave;
 # 7. Seek diff for tables on master and slave
 connection slave;
 include/start_slave.inc
diff --git a/mysql-test/suite/gcol/r/innodb_virtual_debug_purge.result b/mysql-test/suite/gcol/r/innodb_virtual_debug_purge.result
index 1a5734ca516..11dfdf8b52e 100644
--- a/mysql-test/suite/gcol/r/innodb_virtual_debug_purge.result
+++ b/mysql-test/suite/gcol/r/innodb_virtual_debug_purge.result
@@ -12,7 +12,7 @@ CREATE TABLE `t` (
 INSERT INTO t VALUES (REPEAT('g', 16000), REPEAT('x', 16000), DEFAULT, "kk", 1);
 INSERT INTO t VALUES (REPEAT('a', 16000), REPEAT('b', 16000), DEFAULT, "mm", 2);
 CREATE INDEX idx ON t(c(100));
-SET global debug_dbug="+d,ib_purge_virtual_index_callback";
+SET global debug_dbug="d,ib_purge_virtual_index_callback";
 UPDATE t SET a = REPEAT('m', 16000) WHERE a like "aaa%";
 InnoDB		0 transactions not purged
 SET global debug_dbug=@old_dbug;
@@ -27,7 +27,7 @@ i INT
 INSERT INTO t VALUES (REPEAT('g', 100), REPEAT('x', 100), DEFAULT, "kk", 1);
 INSERT INTO t VALUES (REPEAT('a', 100), REPEAT('b', 100), DEFAULT, "mm", 2);
 CREATE INDEX idx ON t(c(100));
-SET global debug_dbug="+d,ib_purge_virtual_index_callback";
+SET global debug_dbug="d,ib_purge_virtual_index_callback";
 UPDATE t SET a = REPEAT('m', 100) WHERE a like "aaa%";
 InnoDB		0 transactions not purged
 SET global debug_dbug=@old_dbug;
@@ -48,7 +48,7 @@ insert into t1 values(3, 4, default);
 insert into t1 values(3, 12, default);
 insert into t1 values(4, 18, default);
 CREATE INDEX idx ON t1(x);
-SET global debug_dbug="+d,ib_purge_virtual_index_callback";
+SET global debug_dbug="d,ib_purge_virtual_index_callback";
 UPDATE t1 SET id = 10 WHERE id = 1;
 InnoDB		0 transactions not purged
 SET global debug_dbug=@old_dbug;
@@ -138,7 +138,7 @@ DROP TABLE t0, t1;
 create table t (a blob, b blob, c blob as (concat(a,b)), h varchar(10), index (c(100)));
 insert t(a,b,h) values (repeat('g', 16000), repeat('x', 16000), "kk");
 insert t(a,b,h) values (repeat('a', 16000), repeat('b', 16000), "mm");
-set global debug_dbug="+d,ib_purge_virtual_index_callback";
+set global debug_dbug="d,ib_purge_virtual_index_callback";
 connect prevent_purge, localhost, root;
 start transaction with consistent snapshot;
 connection default;
@@ -181,7 +181,7 @@ CREATE TABLE t1 (y YEAR, vy YEAR AS (y) VIRTUAL UNIQUE, pk INT PRIMARY KEY)
 ENGINE=InnoDB;
 INSERT INTO t1 (pk,y) VALUES (1,2022);
 CREATE TABLE t2(f1 INT NOT NULL, PRIMARY KEY(f1))ENGINE=InnoDB;
-SET GLOBAL debug_dbug = '+d,ib_purge_virtual_index_callback';
+SET GLOBAL debug_dbug = 'd,ib_purge_virtual_index_callback';
 BEGIN;
 INSERT INTO t2(f1) VALUES(1);
 connection prevent_purge;
@@ -209,7 +209,7 @@ DROP TABLE t1, t2;
 # on table with virtual columns and indexes
 #
 SET @saved_dbug= @@GLOBAL.debug_dbug;
-set global debug_dbug= "+d,ib_purge_virtual_mdev_16222_1,ib_purge_virtual_mdev_16222_2";
+set global debug_dbug= "d,ib_purge_virtual_mdev_16222_1,ib_purge_virtual_mdev_16222_2";
 create table t1 (
 pk serial, vb tinyblob as (b) virtual, b tinyblob,
 primary key(pk), index (vb(64)))
@@ -218,7 +218,7 @@ insert ignore into t1 (b) values ('foo');
 select * into outfile 'load.data' from t1;
 load data infile 'load.data' replace into table t1;
 set debug_sync= "now WAIT_FOR latch_released TIMEOUT 1";
-set global debug_dbug= "-d,ib_purge_virtual_mdev_16222_1";
+set global debug_dbug= @saved_dbug;
 drop table t1;
 set debug_sync= "now SIGNAL drop_started WAIT_FOR got_no_such_table TIMEOUT 1";
 create table t1 (
@@ -254,7 +254,7 @@ SET GLOBAL innodb_debug_sync = "ib_open_after_dict_open "
                                "SIGNAL purge_open "
                                "WAIT_FOR select_open";
 SET @saved_dbug= @@GLOBAL.debug_dbug;
-set global debug_dbug= "+d,ib_purge_virtual_index_callback";
+set global debug_dbug= "d,ib_purge_virtual_index_callback";
 connect purge_waiter,localhost,root;
 SET debug_sync= "now WAIT_FOR before_row_allocated";
 connection default;
diff --git a/mysql-test/suite/gcol/t/innodb_virtual_debug_purge.test b/mysql-test/suite/gcol/t/innodb_virtual_debug_purge.test
index b1a2f0cbdd6..62017e55fbc 100644
--- a/mysql-test/suite/gcol/t/innodb_virtual_debug_purge.test
+++ b/mysql-test/suite/gcol/t/innodb_virtual_debug_purge.test
@@ -22,7 +22,7 @@ INSERT INTO t VALUES (REPEAT('a', 16000), REPEAT('b', 16000), DEFAULT, "mm", 2);
 
 CREATE INDEX idx ON t(c(100));
 
-SET global debug_dbug="+d,ib_purge_virtual_index_callback";
+SET global debug_dbug="d,ib_purge_virtual_index_callback";
 UPDATE t SET a = REPEAT('m', 16000) WHERE a like "aaa%";
 --source ../../innodb/include/wait_all_purged.inc
 SET global debug_dbug=@old_dbug;
@@ -41,7 +41,7 @@ INSERT INTO t VALUES (REPEAT('a', 100), REPEAT('b', 100), DEFAULT, "mm", 2);
 
 CREATE INDEX idx ON t(c(100));
 
-SET global debug_dbug="+d,ib_purge_virtual_index_callback";
+SET global debug_dbug="d,ib_purge_virtual_index_callback";
 UPDATE t SET a = REPEAT('m', 100) WHERE a like "aaa%";
 --source ../../innodb/include/wait_all_purged.inc
 SET global debug_dbug=@old_dbug;
@@ -68,7 +68,7 @@ insert into t1 values(4, 18, default);
 
 CREATE INDEX idx ON t1(x);
 
-SET global debug_dbug="+d,ib_purge_virtual_index_callback";
+SET global debug_dbug="d,ib_purge_virtual_index_callback";
 UPDATE t1 SET id = 10 WHERE id = 1;
 --source ../../innodb/include/wait_all_purged.inc
 SET global debug_dbug=@old_dbug;
@@ -179,7 +179,7 @@ DROP TABLE t0, t1;
 create table t (a blob, b blob, c blob as (concat(a,b)), h varchar(10), index (c(100)));
 insert t(a,b,h) values (repeat('g', 16000), repeat('x', 16000), "kk");
 insert t(a,b,h) values (repeat('a', 16000), repeat('b', 16000), "mm");
-set global debug_dbug="+d,ib_purge_virtual_index_callback";
+set global debug_dbug="d,ib_purge_virtual_index_callback";
 connect(prevent_purge, localhost, root);
 start transaction with consistent snapshot;
 connection default;
@@ -228,7 +228,7 @@ ENGINE=InnoDB;
 INSERT INTO t1 (pk,y) VALUES (1,2022);
 CREATE TABLE t2(f1 INT NOT NULL, PRIMARY KEY(f1))ENGINE=InnoDB;
 
-SET GLOBAL debug_dbug = '+d,ib_purge_virtual_index_callback';
+SET GLOBAL debug_dbug = 'd,ib_purge_virtual_index_callback';
 
 BEGIN;
 INSERT INTO t2(f1) VALUES(1);
@@ -266,7 +266,7 @@ DROP TABLE t1, t2;
 
 --let $datadir= `select @@datadir`
 SET @saved_dbug= @@GLOBAL.debug_dbug;
-set global debug_dbug= "+d,ib_purge_virtual_mdev_16222_1,ib_purge_virtual_mdev_16222_2";
+set global debug_dbug= "d,ib_purge_virtual_mdev_16222_1,ib_purge_virtual_mdev_16222_2";
 
 create table t1 (
   pk serial, vb tinyblob as (b) virtual, b tinyblob,
@@ -288,7 +288,7 @@ load data infile 'load.data' replace into table t1;
 --disable_warnings
 set debug_sync= "now WAIT_FOR latch_released TIMEOUT 1";
 --enable_warnings
-set global debug_dbug= "-d,ib_purge_virtual_mdev_16222_1";
+set global debug_dbug= @saved_dbug;
 drop table t1;
 --remove_file $datadir/test/load.data
 
@@ -350,7 +350,7 @@ SET GLOBAL innodb_debug_sync = "ib_open_after_dict_open "
 # In 10.2 trx_undo_roll_ptr_is_insert(t_roll_ptr) condition never pass in purge,
 # so this condition is forced to pass in row_vers_old_has_index_entry
 SET @saved_dbug= @@GLOBAL.debug_dbug;
-set global debug_dbug= "+d,ib_purge_virtual_index_callback";
+set global debug_dbug= "d,ib_purge_virtual_index_callback";
 
 # The purge starts from REPLACE command. To avoid possible race, separate
 # connection is used.
diff --git a/mysql-test/suite/rpl/disabled.def b/mysql-test/suite/rpl/disabled.def
index bdefb1660bd..62320ad027c 100644
--- a/mysql-test/suite/rpl/disabled.def
+++ b/mysql-test/suite/rpl/disabled.def
@@ -11,7 +11,7 @@
 ##############################################################################
 
 rpl_spec_variables        : BUG#11755836 2009-10-27 jasonh rpl_spec_variables fails on PB2 hpux
-rpl_get_master_version_and_clock : Bug#11766137 Jan 05 2011 joro Valgrind warnings rpl_get_master_version_and_clock
+#rpl_get_master_version_and_clock : Bug#11766137 Jan 05 2011 joro Valgrind warnings rpl_get_master_version_and_clock
 rpl_partition_archive     : MDEV-5077 2013-09-27 svoj Cannot exchange partition with archive table
 rpl_row_binlog_max_cache_size : MDEV-11092
 rpl_row_index_choice      : MDEV-11666
diff --git a/mysql-test/suite/rpl/r/circular_serverid0.result b/mysql-test/suite/rpl/r/circular_serverid0.result
index 928a0a48888..19c800cf01b 100644
--- a/mysql-test/suite/rpl/r/circular_serverid0.result
+++ b/mysql-test/suite/rpl/r/circular_serverid0.result
@@ -3,8 +3,8 @@ include/rpl_connect.inc [creating M4]
 include/rpl_connect.inc [creating M2]
 connection M2;
 STOP SLAVE;
-SET @old_debug= @@global.debug;
-SET GLOBAL debug_dbug= "+d,dbug.rows_events_to_delay_relay_logging";
+SET @old_debug= @@global.debug_dbug;
+SET GLOBAL debug_dbug= "d,dbug.rows_events_to_delay_relay_logging";
 START SLAVE IO_THREAD;
 include/wait_for_slave_io_to_start.inc
 connection M2;
diff --git a/mysql-test/suite/rpl/r/rpl_binlog_errors.result b/mysql-test/suite/rpl/r/rpl_binlog_errors.result
index 06be72d523b..32b158e7041 100644
--- a/mysql-test/suite/rpl/r/rpl_binlog_errors.result
+++ b/mysql-test/suite/rpl/r/rpl_binlog_errors.result
@@ -22,7 +22,7 @@ master-bin.000001	#
 master-bin.000002	#
 ###################### TEST #2
 RESET MASTER;
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 FLUSH LOGS;
 ERROR HY000: Can't generate a unique log-filename master-bin.(1-999)
 
@@ -30,7 +30,7 @@ ERROR HY000: Can't generate a unique log-filename master-bin.(1-999)
 show binary logs;
 Log_name	File_size
 master-bin.000001	#
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 RESET MASTER;
 ###################### TEST #3
 CREATE TABLE t1 (a INT);
@@ -44,11 +44,11 @@ show binary logs;
 Log_name	File_size
 master-bin.000001	#
 master-bin.000002	#
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 ###################### TEST #4
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/bug_46166.data' INTO TABLE t2;
 ERROR HY000: Can't generate a unique log-filename master-bin.(1-999)
 
@@ -56,21 +56,21 @@ ERROR HY000: Can't generate a unique log-filename master-bin.(1-999)
 SELECT count(*) FROM t2;
 count(*)
 1
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 ###################### TEST #5
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/bug_46166-2.data' INTO TABLE t2;
 # assert: must show one entry
 SELECT count(*) FROM t2;
 count(*)
 1
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 ###################### TEST #6
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 SET AUTOCOMMIT=0;
 INSERT INTO t2 VALUES ('muse');
 LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/bug_46166.data' INTO TABLE t2;
@@ -83,11 +83,11 @@ SELECT count(*) FROM t2;
 count(*)
 3
 SET AUTOCOMMIT= 1;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 DELETE FROM t2;
 RESET MASTER;
 ###################### TEST #7
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 SET @@binlog_annotate_row_events= 0;
 SELECT count(*) FROM t4;
 count(*)
@@ -100,14 +100,14 @@ SELECT count(*) FROM t4;
 count(*)
 1
 ### check that the incident event is written to the current log
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 include/show_binlog_events.inc
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Incident	#	#	#1 (LOST_EVENTS)
 DELETE FROM t4;
 RESET MASTER;
 ###################### TEST #8
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 # must show 0 entries
 SELECT count(*) FROM t4;
 count(*)
@@ -147,9 +147,9 @@ count(*)
 SELECT count(*) FROM t2;
 count(*)
 0
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 ###################### TEST #9
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 SET SQL_LOG_BIN=0;
 INSERT INTO t2 VALUES ('aaa'), ('bbb'), ('ccc'), ('ddd');
 INSERT INTO t4 VALUES ('eee'), ('fff'), ('ggg'), ('hhh');
@@ -170,17 +170,17 @@ SELECT count(*) FROM t4;
 count(*)
 0
 SET SQL_LOG_BIN=1;
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 ###################### TEST #10
 call mtr.add_suppression("MYSQL_BIN_LOG::open failed to sync the index file.");
 call mtr.add_suppression("Could not open .*");
 RESET MASTER;
 SHOW WARNINGS;
 Level	Code	Message
-SET GLOBAL debug_dbug="+d,fault_injection_registering_index";
+SET @@global.debug_dbug="d,fault_injection_registering_index";
 FLUSH LOGS;
 ERROR HY000: Can't open file: 'master-bin.000002' (errno: 1 "Operation not permitted")
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 SHOW BINARY LOGS;
 ERROR HY000: You are not using binary logging
 CREATE TABLE t5 (a INT);
@@ -192,10 +192,10 @@ DROP TABLE t5;
 flush tables;
 ###################### TEST #11
 include/rpl_restart_server.inc [server_number=1]
-SET GLOBAL debug_dbug="+d,fault_injection_openning_index";
+SET @@global.debug_dbug="d,fault_injection_openning_index";
 FLUSH LOGS;
 ERROR HY000: Can't open file: 'master-bin.index' (errno: 1 "Operation not permitted")
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 RESET MASTER;
 ERROR HY000: Binlog closed, cannot RESET MASTER
 CREATE TABLE t5 (a INT);
@@ -207,10 +207,10 @@ DROP TABLE t5;
 flush tables;
 include/rpl_restart_server.inc [server_number=1]
 ###################### TEST #12
-SET GLOBAL debug_dbug="+d,fault_injection_new_file_rotate_event";
+SET @@global.debug_dbug="d,fault_injection_new_file_rotate_event";
 FLUSH LOGS;
 ERROR HY000: Can't open file: 'master-bin' (errno: 2 "No such file or directory")
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@old_debug;
 RESET MASTER;
 ERROR HY000: Binlog closed, cannot RESET MASTER
 CREATE TABLE t5 (a INT);
@@ -237,44 +237,40 @@ call mtr.add_suppression("Could not open .*");
 call mtr.add_suppression("MYSQL_BIN_LOG::open failed to sync the index file.");
 call mtr.add_suppression("Can't generate a unique log-filename .*");
 ###################### TEST #13
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,error_unique_log_filename";
+SET @@global.debug_dbug="d,error_unique_log_filename";
 START SLAVE io_thread;
 include/wait_for_slave_io_error.inc [errno=1595]
 Last_IO_Error = 'Relay log write failure: could not queue event from master'
-SET GLOBAL debug_dbug="-d,error_unique_log_filename";
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 include/rpl_restart_server.inc [server_number=2]
 ###################### TEST #14
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,fault_injection_new_file_rotate_event";
+SET @@global.debug_dbug="d,fault_injection_new_file_rotate_event";
 START SLAVE io_thread;
 include/wait_for_slave_io_error.inc [errno=1595]
 Last_IO_Error = 'Relay log write failure: could not queue event from master'
-SET GLOBAL debug_dbug="-d,fault_injection_new_file_rotate_event";
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 include/rpl_restart_server.inc [server_number=2]
 ###################### TEST #15
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,fault_injection_registering_index";
+SET @@global.debug_dbug="d,fault_injection_registering_index";
 START SLAVE io_thread;
 include/wait_for_slave_io_error.inc [errno=1595]
 Last_IO_Error = 'Relay log write failure: could not queue event from master'
-SET GLOBAL debug_dbug="-d,fault_injection_registering_index";
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 include/rpl_restart_server.inc [server_number=2]
 ###################### TEST #16
-SET @old_debug=@@global.debug;
+SET @saved_debug=@@global.debug_dbug;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,fault_injection_openning_index";
+SET @@global.debug_dbug="d,fault_injection_openning_index";
 START SLAVE io_thread;
 include/wait_for_slave_io_error.inc [errno=1595]
 Last_IO_Error = 'Relay log write failure: could not queue event from master'
-SET GLOBAL debug_dbug="-d,fault_injection_openning_index";
-SET GLOBAL debug_dbug=@old_debug;
+SET @@global.debug_dbug=@saved_debug;
 include/rpl_restart_server.inc [server_number=2]
 include/stop_slave_sql.inc
 Warnings:
diff --git a/mysql-test/suite/rpl/r/rpl_corruption.result b/mysql-test/suite/rpl/r/rpl_corruption.result
index f32b7c58ad1..73bb373d6be 100644
--- a/mysql-test/suite/rpl/r/rpl_corruption.result
+++ b/mysql-test/suite/rpl/r/rpl_corruption.result
@@ -13,42 +13,40 @@ connection master;
 CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY, b VARCHAR(10), c VARCHAR(100));
 include/stop_slave.inc
 # 2. Corruption in master binlog and SHOW BINLOG EVENTS
-set @saved_dbug = @@global.debug_dbug;
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event_char";
+SET @saved_dbug = @@global.debug_dbug;
+SET @@global.debug_dbug="d,corrupt_read_log_event_char";
 SHOW BINLOG EVENTS;
 ERROR HY000: Error when executing command SHOW BINLOG EVENTS: Wrong offset or I/O error
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event_char";
+SET @@global.debug_dbug=@saved_dbug;
 # 3. Master read a corrupted event from binlog and send the error to slave
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug="d,corrupt_read_log_event2_set";
 connection slave;
 START SLAVE IO_THREAD;
 include/wait_for_slave_io_error.inc [errno=1236]
 connection master;
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug=@saved_dbug;
 # 4. Master read a corrupted event from binlog and send it to slave
 connection master;
 SET GLOBAL master_verify_checksum=0;
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event2_set";
+SET @@global.debug_dbug="d,corrupt_read_log_event2_set";
 connection slave;
 START SLAVE IO_THREAD;
 include/wait_for_slave_io_error.inc [errno=1595,1743]
 connection master;
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event2_set";
-SET GLOBAL debug_dbug=@saved_dbug;
+SET @@global.debug_dbug=@saved_dbug;
 SET GLOBAL master_verify_checksum=1;
 # 5. Slave. Corruption in network
 connection slave;
 SET @saved_dbug_slave = @@GLOBAL.debug_dbug;
-SET GLOBAL debug_dbug="+d,corrupt_queue_event";
+SET @@global.debug_dbug="d,corrupt_queue_event";
 START SLAVE IO_THREAD;
 include/wait_for_slave_io_error.inc [errno=1595,1743]
-SET GLOBAL debug_dbug="-d,corrupt_queue_event";
+SET @@global.debug_dbug=@saved_dbug_slave;
 # 6. Slave. Corruption in relay log
-SET GLOBAL debug_dbug="+d,corrupt_read_log_event_char";
+SET @@global.debug_dbug="d,corrupt_read_log_event_char";
 START SLAVE SQL_THREAD;
 include/wait_for_slave_sql_error.inc [errno=1593]
-SET GLOBAL debug_dbug="-d,corrupt_read_log_event_char";
-SET GLOBAL debug_dbug=@saved_dbug_slave;
+SET @@global.debug_dbug=@saved_dbug_slave;
 # 7. Seek diff for tables on master and slave
 connection slave;
 include/start_slave.inc
diff --git a/mysql-test/suite/rpl/r/rpl_domain_id_filter_io_crash.result b/mysql-test/suite/rpl/r/rpl_domain_id_filter_io_crash.result
index b8415977154..feef82a57fc 100644
--- a/mysql-test/suite/rpl/r/rpl_domain_id_filter_io_crash.result
+++ b/mysql-test/suite/rpl/r/rpl_domain_id_filter_io_crash.result
@@ -27,7 +27,7 @@ include/start_slave.inc
 DO_DOMAIN_IDS (AFTER)     : 
 IGNORE_DOMAIN_IDS (AFTER) : 
 SET @saved_dbug = @@GLOBAL.debug_dbug;
-SET @@global.debug_dbug="+d,kill_slave_io_before_commit";
+SET @@global.debug_dbug="d,kill_slave_io_before_commit";
 connection master;
 START TRANSACTION;
 INSERT INTO t1 VALUES(2);
@@ -43,7 +43,7 @@ include/wait_for_slave_io_error.inc [errno=1595]
 SELECT * FROM t1;
 i
 1
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 START SLAVE io_thread;
 include/wait_for_slave_io_to_start.inc
 SELECT * FROM t1;
@@ -61,7 +61,7 @@ CHANGE MASTER TO IGNORE_DOMAIN_IDS=(1), MASTER_USE_GTID=slave_pos;
 include/start_slave.inc
 DO_DOMAIN_IDS (AFTER)     : 
 IGNORE_DOMAIN_IDS (AFTER) : 1
-SET @@global.debug_dbug="+d,kill_slave_io_before_commit";
+SET @@global.debug_dbug="d,kill_slave_io_before_commit";
 connection master;
 START TRANSACTION;
 INSERT INTO t1 VALUES(4);
@@ -81,7 +81,7 @@ i
 1
 2
 3
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 START SLAVE io_thread;
 include/wait_for_slave_io_to_start.inc
 SELECT * FROM t1;
@@ -99,7 +99,7 @@ CHANGE MASTER TO IGNORE_DOMAIN_IDS=(), MASTER_USE_GTID=slave_pos;
 include/start_slave.inc
 DO_DOMAIN_IDS (AFTER)     : 
 IGNORE_DOMAIN_IDS (AFTER) : 
-SET @@global.debug_dbug="+d,kill_slave_io_before_commit";
+SET @@global.debug_dbug="d,kill_slave_io_before_commit";
 connection master;
 START TRANSACTION;
 INSERT INTO t1 VALUES(6);
@@ -134,7 +134,7 @@ i
 1
 2
 3
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 include/stop_slave.inc
 DO_DOMAIN_IDS (BEFORE)     : 
 IGNORE_DOMAIN_IDS (BEFORE) : 
@@ -159,7 +159,7 @@ CHANGE MASTER TO IGNORE_DOMAIN_IDS=(1), MASTER_USE_GTID=slave_pos;
 include/start_slave.inc
 DO_DOMAIN_IDS (AFTER)     : 
 IGNORE_DOMAIN_IDS (AFTER) : 1
-SET @@global.debug_dbug="+d,kill_slave_io_before_commit";
+SET @@global.debug_dbug="d,kill_slave_io_before_commit";
 connection master;
 SET @@session.gtid_domain_id= 1;
 START TRANSACTION;
@@ -203,7 +203,7 @@ i
 3
 10
 11
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 include/stop_slave.inc
 DO_DOMAIN_IDS (BEFORE)     : 
 IGNORE_DOMAIN_IDS (BEFORE) : 1
@@ -232,7 +232,7 @@ CHANGE MASTER TO IGNORE_DOMAIN_IDS=(1), MASTER_USE_GTID=slave_pos;
 include/start_slave.inc
 DO_DOMAIN_IDS (AFTER)     : 
 IGNORE_DOMAIN_IDS (AFTER) : 1
-SET @@global.debug_dbug="+d,kill_slave_io_after_2_events";
+SET @@global.debug_dbug="d,kill_slave_io_after_2_events";
 connection master;
 SET @@session.gtid_domain_id= 1;
 START TRANSACTION;
@@ -286,7 +286,7 @@ i
 15
 16
 17
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 include/stop_slave.inc
 DO_DOMAIN_IDS (BEFORE)     : 
 IGNORE_DOMAIN_IDS (BEFORE) : 1
@@ -319,7 +319,7 @@ CHANGE MASTER TO IGNORE_DOMAIN_IDS=(), MASTER_USE_GTID=slave_pos;
 include/start_slave.inc
 DO_DOMAIN_IDS (AFTER)     : 
 IGNORE_DOMAIN_IDS (AFTER) : 
-SET @@global.debug_dbug="+d,kill_slave_io_after_2_events";
+SET @@global.debug_dbug="d,kill_slave_io_after_2_events";
 connection master;
 SET @@session.gtid_domain_id= 1;
 START TRANSACTION;
@@ -383,7 +383,7 @@ i
 21
 22
 23
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 include/stop_slave.inc
 DO_DOMAIN_IDS (BEFORE)     : 
 IGNORE_DOMAIN_IDS (BEFORE) : 
diff --git a/mysql-test/suite/rpl/r/rpl_get_master_version_and_clock.result b/mysql-test/suite/rpl/r/rpl_get_master_version_and_clock.result
index e7f4e566566..deea7caa12a 100644
--- a/mysql-test/suite/rpl/r/rpl_get_master_version_and_clock.result
+++ b/mysql-test/suite/rpl/r/rpl_get_master_version_and_clock.result
@@ -1,33 +1,42 @@
 include/master-slave.inc
 [connection master]
+connection slave;
 call mtr.add_suppression("Slave I/O: Master command COM_REGISTER_SLAVE failed: .*");
 call mtr.add_suppression("Slave I/O: .* failed with error: Lost connection to MySQL server at 'reading initial communication packet'");
 call mtr.add_suppression("Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids; .*");
 call mtr.add_suppression("Slave I/O thread .* register on master");
+SET @saved_dbug = @@GLOBAL.debug_dbug;
+connection slave;
 include/stop_slave.inc
-SET @@global.debug= "+d,'debug_lock.before_get_UNIX_TIMESTAMP'";
+SET @old_dbug = @@global.debug_dbug;
+SET @@global.debug_dbug= "d,'debug_lock.before_get_UNIX_TIMESTAMP'";
 include/start_slave.inc
 slave is going to hang in get_master_version_and_clock
 include/rpl_stop_server.inc [server_number=1]
 slave is unblocked
 SET DEBUG_SYNC='now SIGNAL signal.get_unix_timestamp';
+connection slave;
 Check network error happened here
 include/wait_for_slave_io_error.inc [errno=1053, 2002, 2003, 2006, 2013]
-set @@global.debug = "-d,'debug_lock.before_get_UNIX_TIMESTAMP'";
+set @@global.debug_dbug= @old_dbug;
 include/rpl_start_server.inc [server_number=1]
 include/wait_for_slave_param.inc [Slave_IO_Running]
+connection slave;
+connection slave;
 include/stop_slave.inc
-SET @@global.debug= "+d,'debug_lock.before_get_SERVER_ID'";
+SET @old_dbug = @@global.debug_dbug;
+SET @@global.debug_dbug= "d,'debug_lock.before_get_SERVER_ID'";
 include/start_slave.inc
 slave is going to hang in get_master_version_and_clock
 include/rpl_stop_server.inc [server_number=1]
 slave is unblocked
 SET DEBUG_SYNC='now SIGNAL signal.get_server_id';
+connection slave;
 Check network error happened here
 include/wait_for_slave_io_error.inc [errno=1053, 2002, 2003, 2006, 2013]
-set @@global.debug = "-d,'debug_lock.before_get_SERVER_ID'";
+set @@global.debug_dbug= @old_dbug;
 include/rpl_start_server.inc [server_number=1]
 include/wait_for_slave_param.inc [Slave_IO_Running]
-set global debug= '';
+SET @@GLOBAL.debug_dbug = @saved_dbug;
 SET DEBUG_SYNC= 'RESET';
 include/rpl_end.inc
diff --git a/mysql-test/suite/rpl/r/rpl_gtid_strict.result b/mysql-test/suite/rpl/r/rpl_gtid_strict.result
index 528c4c5b5c1..27e7d105125 100644
--- a/mysql-test/suite/rpl/r/rpl_gtid_strict.result
+++ b/mysql-test/suite/rpl/r/rpl_gtid_strict.result
@@ -27,16 +27,17 @@ master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 SET server_id= 3;
 SET gtid_seq_no= 3;
 ERROR HY000: An attempt was made to binlog GTID 0-3-3 which would create an out-of-order sequence number with existing GTID 0-1-3, and gtid strict mode is enabled
-SET SESSION debug_dbug="+d,ignore_set_gtid_seq_no_check";
+SET @old_dbug = @@session.debug_dbug;
+SET SESSION debug_dbug="d,ignore_set_gtid_seq_no_check";
 SET gtid_seq_no= 3;
-SET SESSION debug_dbug="-d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug=@old_dbug;
 INSERT INTO t1 VALUES (2);
 ERROR HY000: An attempt was made to binlog GTID 0-3-3 which would create an out-of-order sequence number with existing GTID 0-1-3, and gtid strict mode is enabled
 SET gtid_seq_no= 2;
 ERROR HY000: An attempt was made to binlog GTID 0-3-2 which would create an out-of-order sequence number with existing GTID 0-1-3, and gtid strict mode is enabled
-SET SESSION debug_dbug="+d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug="d,ignore_set_gtid_seq_no_check";
 SET gtid_seq_no= 2;
-SET SESSION debug_dbug="-d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug=@old_dbug;
 INSERT INTO t1 VALUES (3);
 ERROR HY000: An attempt was made to binlog GTID 0-3-2 which would create an out-of-order sequence number with existing GTID 0-1-3, and gtid strict mode is enabled
 SET server_id= 1;
@@ -62,9 +63,9 @@ master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 SET server_id= 3;
 SET gtid_seq_no= 1;
 ERROR HY000: An attempt was made to binlog GTID 0-3-1 which would create an out-of-order sequence number with existing GTID 0-1-4, and gtid strict mode is enabled
-SET SESSION debug_dbug="+d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug="d,ignore_set_gtid_seq_no_check";
 SET gtid_seq_no= 1;
-SET SESSION debug_dbug="-d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug=@old_dbug;
 CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=MyISAM;
 ERROR HY000: An attempt was made to binlog GTID 0-3-1 which would create an out-of-order sequence number with existing GTID 0-1-4, and gtid strict mode is enabled
 SET sql_log_bin= 0;
@@ -73,9 +74,9 @@ SET sql_log_bin= 1;
 CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=MyISAM;
 SET gtid_seq_no= 1;
 ERROR HY000: An attempt was made to binlog GTID 0-3-1 which would create an out-of-order sequence number with existing GTID 0-3-5, and gtid strict mode is enabled
-SET SESSION debug_dbug="+d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug="d,ignore_set_gtid_seq_no_check";
 SET gtid_seq_no= 1;
-SET SESSION debug_dbug="-d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug=@old_dbug;
 INSERT INTO t2 VALUES (1);
 ERROR HY000: An attempt was made to binlog GTID 0-3-1 which would create an out-of-order sequence number with existing GTID 0-3-5, and gtid strict mode is enabled
 SET server_id= 1;
diff --git a/mysql-test/suite/rpl/r/rpl_row_corruption.result b/mysql-test/suite/rpl/r/rpl_row_corruption.result
index b5bdc32200a..24535460418 100644
--- a/mysql-test/suite/rpl/r/rpl_row_corruption.result
+++ b/mysql-test/suite/rpl/r/rpl_row_corruption.result
@@ -7,15 +7,15 @@ INSERT INTO t2_11753004 VALUES (2);
 connection slave;
 call mtr.add_suppression(".*Found table map event mapping table id 0 which was already mapped but with different settings.*");
 include/stop_slave.inc
-SET @save_debug= @@global.debug;
-SET GLOBAL debug_dbug="+d,inject_tblmap_same_id_maps_diff_table";
+SET @saved_debug= @@global.debug_dbug;
+SET @@global.debug_dbug="d,inject_tblmap_same_id_maps_diff_table";
 include/start_slave.inc
 connection master;
 UPDATE t1_11753004, t2_11753004 SET t1_11753004.c1=3, t2_11753004.c1=4 WHERE t1_11753004.c1=1 OR t2_11753004.c1=2;
 connection slave;
 include/wait_for_slave_sql_error.inc [errno=1593 ]
 include/stop_slave.inc
-SET GLOBAL debug_dbug="-d,inject_tblmap_same_id_maps_diff_table";
+SET @@global.debug_dbug=@saved_debug;
 include/start_slave.inc
 connection master;
 include/rpl_reset.inc
@@ -23,7 +23,7 @@ DROP TABLE t1_11753004, t2_11753004;
 connection slave;
 connection slave;
 include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,inject_tblmap_same_id_maps_diff_table";
+SET @@global.debug_dbug="d,inject_tblmap_same_id_maps_diff_table";
 include/start_slave.inc
 include/rpl_reset.inc
 connection master;
@@ -41,7 +41,7 @@ BINLOG '
 SOgWTg8BAAAAbgAAAHIAAAAAAAQANS42LjMtbTUtZGVidWctbG9nAAAAAAAAAAAAAAAAAAAAAAAA
 AAAAAAAAAAAAAAAAAABI6BZOEzgNAAgAEgAEBAQEEgAAVgAEGggAAAAICAgCAAAAAAVAYI8=
 '/*!*/;
-SET GLOBAL debug_dbug="+d,inject_tblmap_same_id_maps_diff_table";
+SET @@global.debug_dbug="d,inject_tblmap_same_id_maps_diff_table";
 BINLOG '
 SOgWThMBAAAAKQAAAAYDAAAAAEIAAAAAAAEABHRlc3QAAnQxAAEDAAE=
 SOgWThMBAAAAKQAAAC8DAAAAAEMAAAAAAAEABHRlc3QAAnQyAAEDAAE=
@@ -51,10 +51,10 @@ SOgWThgBAAAAKAAAAH8DAAAAAEMAAAAAAAEAAf///gEAAAD+BAAAAA==
 ERROR HY000: Fatal error: Found table map event mapping table id 0 which was already mapped but with different settings.
 DROP TABLE t1,t2;
 connection slave;
-SET GLOBAL debug_dbug="-d,inject_tblmap_same_id_maps_diff_table";
+SET @@global.debug_dbug=@saved_debug;
 connection master;
 DROP TABLE t1_11753004;
 DROP TABLE t2_11753004_ign;
 connection slave;
-SET GLOBAL debug_dbug= @save_debug;
+SET @@global.debug_dbug= @save_debug;
 include/rpl_end.inc
diff --git a/mysql-test/suite/rpl/r/rpl_stm_stop_middle_group.result b/mysql-test/suite/rpl/r/rpl_stm_stop_middle_group.result
index b670a16bfcd..0afe1992fb9 100644
--- a/mysql-test/suite/rpl/r/rpl_stm_stop_middle_group.result
+++ b/mysql-test/suite/rpl/r/rpl_stm_stop_middle_group.result
@@ -7,7 +7,7 @@ create table tm (a int auto_increment primary key) engine=myisam;
 create table ti (a int auto_increment primary key) engine=innodb;
 connection slave;
 SET @saved_dbug = @@GLOBAL.debug_dbug;
-set @@global.debug_dbug="+d,stop_slave_middle_group";
+set @@global.debug_dbug="d,stop_slave_middle_group";
 connection master;
 begin;
 insert into ti set a=null;
@@ -28,14 +28,13 @@ one
 select count(*) as one from ti;
 one
 1
-set @@global.debug_dbug="-d";
+set @@global.debug_dbug=@saved_dbug;
 include/start_slave.inc
 connection master;
 truncate table tm;
 truncate table ti;
 connection slave;
-set @@global.debug_dbug="+d,stop_slave_middle_group";
-set @@global.debug_dbug="+d,incomplete_group_in_relay_log";
+set @@global.debug_dbug="d,stop_slave_middle_group,incomplete_group_in_relay_log";
 connection master;
 begin;
 insert into ti set a=null;
@@ -54,14 +53,13 @@ one
 select count(*) as zero from ti;
 zero
 0
-set @@global.debug_dbug="-d";
+set @@global.debug_dbug=@saved_dbug;
 stop slave;
 truncate table tm;
 include/start_slave.inc
 connection master;
 connection slave;
-set @@global.debug_dbug="+d,stop_slave_middle_group";
-set @@global.debug_dbug="+d,incomplete_group_in_relay_log";
+set @@global.debug_dbug="d,stop_slave_middle_group,incomplete_group_in_relay_log";
 connection master;
 update tm as t1, ti as t2 set t1.a=t1.a * 2, t2.a=t2.a * 2;
 connection slave;
diff --git a/mysql-test/suite/rpl/t/circular_serverid0.test b/mysql-test/suite/rpl/t/circular_serverid0.test
index 097a2932404..64cf231c2c2 100644
--- a/mysql-test/suite/rpl/t/circular_serverid0.test
+++ b/mysql-test/suite/rpl/t/circular_serverid0.test
@@ -24,8 +24,8 @@
 
 --connection M2
 STOP SLAVE;
-SET @old_debug= @@global.debug;
-SET GLOBAL debug_dbug= "+d,dbug.rows_events_to_delay_relay_logging";
+SET @old_debug= @@global.debug_dbug;
+SET GLOBAL debug_dbug= "d,dbug.rows_events_to_delay_relay_logging";
 START SLAVE IO_THREAD;
 --source include/wait_for_slave_io_to_start.inc
 
diff --git a/mysql-test/suite/rpl/t/rpl_bug41902-slave.opt b/mysql-test/suite/rpl/t/rpl_bug41902-slave.opt
deleted file mode 100644
index 37fc56036fb..00000000000
--- a/mysql-test/suite/rpl/t/rpl_bug41902-slave.opt
+++ /dev/null
@@ -1 +0,0 @@
---loose-debug=-d,simulate_find_log_pos_error
diff --git a/mysql-test/suite/rpl/t/rpl_domain_id_filter_io_crash.test b/mysql-test/suite/rpl/t/rpl_domain_id_filter_io_crash.test
index f3ba39fb330..a949da0cc25 100644
--- a/mysql-test/suite/rpl/t/rpl_domain_id_filter_io_crash.test
+++ b/mysql-test/suite/rpl/t/rpl_domain_id_filter_io_crash.test
@@ -36,7 +36,7 @@ let $ignore_domain_ids_after= query_get_value(SHOW SLAVE STATUS, Replicate_Ignor
 --echo IGNORE_DOMAIN_IDS (AFTER) : $ignore_domain_ids_after
 
 SET @saved_dbug = @@GLOBAL.debug_dbug;
-SET @@global.debug_dbug="+d,kill_slave_io_before_commit";
+SET @@global.debug_dbug="d,kill_slave_io_before_commit";
 
 connection master;
 
@@ -51,7 +51,7 @@ connection slave;
 --let $slave_io_errno= 1595
 --source include/wait_for_slave_io_error.inc
 SELECT * FROM t1;
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 
 START SLAVE io_thread;
 --source include/wait_for_slave_io_to_start.inc
@@ -77,7 +77,7 @@ let $ignore_domain_ids_after= query_get_value(SHOW SLAVE STATUS, Replicate_Ignor
 --echo DO_DOMAIN_IDS (AFTER)     : $do_domain_ids_after
 --echo IGNORE_DOMAIN_IDS (AFTER) : $ignore_domain_ids_after
 
-SET @@global.debug_dbug="+d,kill_slave_io_before_commit";
+SET @@global.debug_dbug="d,kill_slave_io_before_commit";
 
 connection master;
 
@@ -93,7 +93,7 @@ connection slave;
 --let $slave_io_errno= 1595
 --source include/wait_for_slave_io_error.inc
 SELECT * FROM t1;
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 
 START SLAVE io_thread;
 --source include/wait_for_slave_io_to_start.inc
@@ -119,7 +119,7 @@ let $ignore_domain_ids_after= query_get_value(SHOW SLAVE STATUS, Replicate_Ignor
 --echo DO_DOMAIN_IDS (AFTER)     : $do_domain_ids_after
 --echo IGNORE_DOMAIN_IDS (AFTER) : $ignore_domain_ids_after
 
-SET @@global.debug_dbug="+d,kill_slave_io_before_commit";
+SET @@global.debug_dbug="d,kill_slave_io_before_commit";
 
 connection master;
 
@@ -148,7 +148,7 @@ connection slave;
 --source include/wait_for_slave_io_error.inc
 SELECT * FROM t1;
 
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 
 --source include/stop_slave.inc
 let $do_domain_ids_before= query_get_value(SHOW SLAVE STATUS, Replicate_Do_Domain_Ids, 1);
@@ -186,7 +186,7 @@ let $ignore_domain_ids_after= query_get_value(SHOW SLAVE STATUS, Replicate_Ignor
 --echo DO_DOMAIN_IDS (AFTER)     : $do_domain_ids_after
 --echo IGNORE_DOMAIN_IDS (AFTER) : $ignore_domain_ids_after
 
-SET @@global.debug_dbug="+d,kill_slave_io_before_commit";
+SET @@global.debug_dbug="d,kill_slave_io_before_commit";
 
 connection master;
 
@@ -216,7 +216,7 @@ connection slave;
 --source include/wait_for_slave_io_error.inc
 SELECT * FROM t1;
 
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 
 --source include/stop_slave.inc
 let $do_domain_ids_before= query_get_value(SHOW SLAVE STATUS, Replicate_Do_Domain_Ids, 1);
@@ -254,7 +254,7 @@ let $ignore_domain_ids_after= query_get_value(SHOW SLAVE STATUS, Replicate_Ignor
 --echo DO_DOMAIN_IDS (AFTER)     : $do_domain_ids_after
 --echo IGNORE_DOMAIN_IDS (AFTER) : $ignore_domain_ids_after
 
-SET @@global.debug_dbug="+d,kill_slave_io_after_2_events";
+SET @@global.debug_dbug="d,kill_slave_io_after_2_events";
 
 connection master;
 
@@ -284,7 +284,7 @@ connection slave;
 --source include/wait_for_slave_io_error.inc
 SELECT * FROM t1;
 
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 
 --source include/stop_slave.inc
 let $do_domain_ids_before= query_get_value(SHOW SLAVE STATUS, Replicate_Do_Domain_Ids, 1);
@@ -322,7 +322,7 @@ let $ignore_domain_ids_after= query_get_value(SHOW SLAVE STATUS, Replicate_Ignor
 --echo DO_DOMAIN_IDS (AFTER)     : $do_domain_ids_after
 --echo IGNORE_DOMAIN_IDS (AFTER) : $ignore_domain_ids_after
 
-SET @@global.debug_dbug="+d,kill_slave_io_after_2_events";
+SET @@global.debug_dbug="d,kill_slave_io_after_2_events";
 
 connection master;
 
@@ -352,7 +352,7 @@ connection slave;
 --source include/wait_for_slave_io_error.inc
 SELECT * FROM t1;
 
-SET @@global.debug_dbug="-d";
+SET @@global.debug_dbug=@saved_dbug;
 
 --source include/stop_slave.inc
 let $do_domain_ids_before= query_get_value(SHOW SLAVE STATUS, Replicate_Do_Domain_Ids, 1);
diff --git a/mysql-test/suite/rpl/t/rpl_gtid_strict.test b/mysql-test/suite/rpl/t/rpl_gtid_strict.test
index afcb179da78..56ebba824c4 100644
--- a/mysql-test/suite/rpl/t/rpl_gtid_strict.test
+++ b/mysql-test/suite/rpl/t/rpl_gtid_strict.test
@@ -29,17 +29,18 @@ INSERT INTO t1 VALUES (1);
 SET server_id= 3;
 --error ER_GTID_STRICT_OUT_OF_ORDER
 SET gtid_seq_no= 3;
-SET SESSION debug_dbug="+d,ignore_set_gtid_seq_no_check";
+SET @old_dbug = @@session.debug_dbug;
+SET SESSION debug_dbug="d,ignore_set_gtid_seq_no_check";
 SET gtid_seq_no= 3;
-SET SESSION debug_dbug="-d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug=@old_dbug;
 --error ER_GTID_STRICT_OUT_OF_ORDER
 INSERT INTO t1 VALUES (2);
 
 --error ER_GTID_STRICT_OUT_OF_ORDER
 SET gtid_seq_no= 2;
-SET SESSION debug_dbug="+d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug="d,ignore_set_gtid_seq_no_check";
 SET gtid_seq_no= 2;
-SET SESSION debug_dbug="-d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug=@old_dbug;
 --error ER_GTID_STRICT_OUT_OF_ORDER
 INSERT INTO t1 VALUES (3);
 SET server_id= 1;
@@ -52,9 +53,9 @@ SELECT * FROM t1 ORDER BY 1;
 SET server_id= 3;
 --error ER_GTID_STRICT_OUT_OF_ORDER
 SET gtid_seq_no= 1;
-SET SESSION debug_dbug="+d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug="d,ignore_set_gtid_seq_no_check";
 SET gtid_seq_no= 1;
-SET SESSION debug_dbug="-d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug=@old_dbug;
 --error ER_GTID_STRICT_OUT_OF_ORDER
 CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=MyISAM;
 # The table is still created, DDL cannot be rolled back.
@@ -66,9 +67,9 @@ CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=MyISAM;
 
 --error ER_GTID_STRICT_OUT_OF_ORDER
 SET gtid_seq_no= 1;
-SET SESSION debug_dbug="+d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug="d,ignore_set_gtid_seq_no_check";
 SET gtid_seq_no= 1;
-SET SESSION debug_dbug="-d,ignore_set_gtid_seq_no_check";
+SET SESSION debug_dbug=@old_dbug;
 --error ER_GTID_STRICT_OUT_OF_ORDER
 INSERT INTO t2 VALUES (1);
 # The value is still inserted, cannot be rolled back.
diff --git a/mysql-test/suite/rpl/t/rpl_row_corruption.test b/mysql-test/suite/rpl/t/rpl_row_corruption.test
index acf3964f0c5..d78df905ccb 100644
--- a/mysql-test/suite/rpl/t/rpl_row_corruption.test
+++ b/mysql-test/suite/rpl/t/rpl_row_corruption.test
@@ -27,8 +27,8 @@ call mtr.add_suppression(".*Found table map event mapping table id 0 which was a
 
 # stop the slave and inject corruption
 --source include/stop_slave.inc
-SET @save_debug= @@global.debug;
-SET GLOBAL debug_dbug="+d,inject_tblmap_same_id_maps_diff_table";
+SET @saved_debug= @@global.debug_dbug;
+SET @@global.debug_dbug="d,inject_tblmap_same_id_maps_diff_table";
 --source include/start_slave.inc
 --connection master
 # both tables get mapped to 0 (in a way, simulating scenario 
@@ -42,7 +42,7 @@ SET GLOBAL debug_dbug="+d,inject_tblmap_same_id_maps_diff_table";
 --source include/stop_slave.inc
 
 # clean up
-SET GLOBAL debug_dbug="-d,inject_tblmap_same_id_maps_diff_table";
+SET @@global.debug_dbug=@saved_debug;
 --source include/start_slave.inc
 --connection master
 --source include/rpl_reset.inc
@@ -55,7 +55,7 @@ SET GLOBAL debug_dbug="-d,inject_tblmap_same_id_maps_diff_table";
 
 --connection slave
 --source include/stop_slave.inc
-SET GLOBAL debug_dbug="+d,inject_tblmap_same_id_maps_diff_table";
+SET @@global.debug_dbug="d,inject_tblmap_same_id_maps_diff_table";
 --source include/start_slave.inc
 --source include/rpl_reset.inc
 --connection master
@@ -92,7 +92,7 @@ AAAAAAAAAAAAAAAAAABI6BZOEzgNAAgAEgAEBAQEEgAAVgAEGggAAAAICAgCAAAAAAVAYI8=
 #110708 12:21:44 server id 1  end_log_pos 855   Update_rows: table id 66
 # at 855
 #110708 12:21:44 server id 1  end_log_pos 895   Update_rows: table id 67 flags: STMT_END_F
-SET GLOBAL debug_dbug="+d,inject_tblmap_same_id_maps_diff_table";
+SET @@global.debug_dbug="d,inject_tblmap_same_id_maps_diff_table";
 --error ER_SLAVE_FATAL_ERROR
 BINLOG '
 SOgWThMBAAAAKQAAAAYDAAAAAEIAAAAAAAEABHRlc3QAAnQxAAEDAAE=
@@ -105,11 +105,11 @@ SOgWThgBAAAAKAAAAH8DAAAAAEMAAAAAAAEAAf///gEAAAD+BAAAAA==
 # clean up
 DROP TABLE t1,t2;
 --connection slave
-SET GLOBAL debug_dbug="-d,inject_tblmap_same_id_maps_diff_table";
+SET @@global.debug_dbug=@saved_debug;
 --connection master
 --eval DROP TABLE $t1
 --eval DROP TABLE $t2_ign
 --sync_slave_with_master
-SET GLOBAL debug_dbug= @save_debug;
+SET @@global.debug_dbug= @save_debug;
 
 --source include/rpl_end.inc