Added missing tests for GET DIAGNOSTICS.

mysql-test/suite/rpl/t/rpl_stm_user_variables.test

@@ -167,4 +167,43 @@ DROP TABLE t1;
 
 -- sync_slave_with_master
 
+--echo
+--echo # The GET DIAGNOSTICS itself is not replicated, but it can set
+--echo # variables which can be used in statements that are replicated.
+--echo
+
+--source include/rpl_reset.inc
+connection master;
+
+CREATE TABLE t1 (a INT, b INT);
+GET DIAGNOSTICS @var1 = NUMBER;
+INSERT INTO t1 VALUES (@var1, 0), (@var1, 0);
+
+DELIMITER |;
+CREATE PROCEDURE p1()
+LANGUAGE SQL
+BEGIN
+  DECLARE count INT;
+  UPDATE t1 SET b = 2 WHERE a = 0;
+  GET DIAGNOSTICS count = ROW_COUNT;
+  INSERT INTO t1 VALUES (1, count);
+END|
+DELIMITER ;|
+
+CALL p1();
+
+-- sync_slave_with_master
+
+connection slave;
+--echo # On slave, check if the statement was replicated.
+SELECT * FROM t1 ORDER BY a;
+
+connection master;
+--echo # Show events and cleanup
+--source include/show_binlog_events.inc
+DROP TABLE t1;
+DROP PROCEDURE p1;
+
+-- sync_slave_with_master
+
 --source include/rpl_end.inc