Build tested: 1.4.1-1

[dlee@cs-tst-01 centos7]$ cat gitversionInfo.txt
engine commit:
3e7a964

Test suite: autopilot.windowFunctions

There are a total of 6576 queries in the test suite. 2976 of them failed with a syntax error. All these queries got executed successfully in 1.2.5-1 and 1.4.0-1.

select o_custkey, regr_syy(o_custkey,o_orderkey) OVER (PARTITION BY 55 ORDER BY o_custkey ,o_orderkey ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING) from orders order by 1, 2;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'OVER (PARTITION BY 55 ORDER BY o_custkey ,o_orderkey ROWS BETWEEN CURRENT ROW AN' at line 1

All returned errors complain about "near the OVER keyword"