include/master-slave.inc [connection master] create table t1 (a int, unique(a)) engine=myisam; set sql_log_bin=0; insert into t1 values(2); set sql_log_bin=1; insert into t1 values(1),(2); ERROR 23000: Duplicate entry '2' for key 'a' drop table t1; include/wait_for_slave_sql_to_stop.inc Error: "Query caused different errors on master and slave. Error on master: message (format)='Duplicate entry '%-.192s' for key %d' error code=1062 ; Error on slave: actual message='no error', error code=0. Default database: 'test'. Query: 'insert into t1 values(1),(2)'" (expected different error codes on master and slave) Errno: "0" (expected 0) drop table t1; include/stop_slave.inc RESET SLAVE; include/rpl_end.inc