#
# Bug 42074 concurrent optimize table and 
# alter table = Assertion failed: thd->is_error()
#
DROP TABLE IF EXISTS t1;
# Create InnoDB table
CREATE TABLE t1 (id INT) engine=innodb;
# Connection 1
# Start optimizing table
SET DEBUG_SYNC='ha_admin_try_alter SIGNAL optimize_started WAIT_FOR table_altered';
OPTIMIZE TABLE t1;
# Connection 2
# Change table to engine=memory
SET DEBUG_SYNC='now WAIT_FOR optimize_started';
ALTER TABLE t1 engine=memory;
SET DEBUG_SYNC='now SIGNAL table_altered';
# Connection 1
# Complete optimization
Table	Op	Msg_type	Msg_text
test.t1	optimize	note	Table does not support optimize, doing recreate + analyze instead
test.t1	optimize	error	Got error -1 from storage engine
test.t1	optimize	status	Operation failed
Warnings:
Error	1030	Got error -1 from storage engine
DROP TABLE t1;
SET DEBUG_SYNC='RESET';