CREATE TABLE t0 (pk INT PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE t1 (pk INT PRIMARY KEY, b INT) ENGINE=InnoDB;
connect  con1,localhost,root,,test;
BEGIN;
INSERT INTO t0 SET pk=1;
connect  con2,localhost,root,,test;
BEGIN;
INSERT INTO t0 SET pk=2;
connection default;
SET DEBUG_SYNC='alter_table_inplace_after_lock_downgrade SIGNAL prepared WAIT_FOR logged';
ALTER TABLE t1 FORCE;
connection con1;
SET DEBUG_SYNC='now WAIT_FOR prepared';
INSERT INTO t1 SET pk=1;
COMMIT;
disconnect con1;
connection con2;
UPDATE t1 SET b=1;
DELETE FROM t1;
ROLLBACK;
SET DEBUG_SYNC='now SIGNAL logged';
disconnect con2;
connection default;
SET DEBUG_SYNC='RESET';
DROP TABLE t0,t1;