Addendum to Bug #49734 : fixed an unstable test case.

mysql-test/r/union.result

@@ -1640,9 +1640,6 @@ Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` union select `test`.`t1
 # Should not crash
 SELECT * FROM t1 UNION SELECT * FROM t1
 ORDER BY (SELECT a FROM t2 WHERE b = 12);
-a
-1
-2
 # Should not crash
 SELECT * FROM t2 UNION SELECT * FROM t2
 ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));

mysql-test/t/union.test

@@ -1144,8 +1144,10 @@ SELECT * FROM t1 UNION SELECT * FROM t1
   ORDER BY (SELECT a FROM t2 WHERE b = 12);
 
 --echo # Should not crash
+--disable_result_log
 SELECT * FROM t1 UNION SELECT * FROM t1
   ORDER BY (SELECT a FROM t2 WHERE b = 12);
+--enable_result_log
 
 --echo # Should not crash
 SELECT * FROM t2 UNION SELECT * FROM t2