--source include/have_innodb.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc
# Embedded server does not support restarting
--source include/not_embedded.inc

--disable_query_log
FLUSH TABLES;
--enable_query_log

--echo #
--echo # Bug#20872655 XA ROLLBACK IS NOT CRASH-SAFE
--echo #

CREATE TABLE t(a INT PRIMARY KEY, b INT UNIQUE) ENGINE=INNODB;
INSERT INTO t SET a=0;
connect (con1,localhost,root);
XA START 'zombie';
INSERT INTO t SET a=1;
UPDATE t SET b=1 WHERE a=1;
SELECT COUNT(*) FROM t;
XA END 'zombie';
XA PREPARE 'zombie';
SET DEBUG_SYNC='trx_after_rollback_row SIGNAL s1 WAIT_FOR s2';
--send XA ROLLBACK 'zombie'
connection default;
SET DEBUG_SYNC='now WAIT_FOR s1';
# Ensure that the state change from XA PREPARE to ACTIVE gets flushed
# to the redo log. Without this, it could be that we will recover to
# a state that precedes the start of the XA ROLLBACK.
SET GLOBAL innodb_flush_log_at_trx_commit=1;
DELETE FROM t LIMIT 1;
let $shutdown_timeout=0;
--source include/restart_mysqld.inc
disconnect con1;
# If the trx_undo_set_state_at_prepare() is omitted at the start of
# XA ROLLBACK, then the XA COMMIT would succeed and the table would
# incorrectly show the result of the INSERT but not the UPDATE,
# because we would commit a partially rolled back transaction.
--error ER_XAER_NOTA
XA COMMIT 'zombie';
SELECT * FROM t;
DROP TABLE t;