--source include/have_debug_sync.inc

# Save the initial number of concurrent sessions.
--source include/count_sessions.inc

connect (con1,localhost,root,,);

connection default;

CREATE TABLE t (a INT PRIMARY KEY, b INT NOT NULL) ENGINE=InnoDB;
INSERT INTO t VALUES(1,2),(2,3);

SET DEBUG_SYNC='alter_table_inplace_after_lock_downgrade SIGNAL do WAIT_FOR m';
SET DEBUG_SYNC='innodb_after_inplace_alter_table SIGNAL scanned WAIT_FOR done';
--send
CREATE INDEX tb ON t(b);

connection con1;
SET DEBUG_SYNC='now WAIT_FOR do';
SET DEBUG_SYNC='row_update_for_mysql_error SIGNAL m WAIT_FOR scanned';
--error ER_DUP_ENTRY
UPDATE t SET a=2 WHERE a=1;
call mtr.add_suppression(' record in index .*tb was not found on rollback, trying to insert');
SET DEBUG_SYNC='now SIGNAL done';

disconnect con1;

connection default;
reap;
SET DEBUG_SYNC='RESET';
DROP TABLE t;

# Check that all connections opened by test cases in this file are really
# gone so execution of other tests won't be affected by their presence.
--source include/wait_until_count_sessions.inc