MDEV-10580 sql_mode=ORACLE: FOR loop statement

Fixed a crash when trying to use a FOR loop as a compound statement
outside of an SP. A bug in 051e415d8a251bd70e9b73619dbcc40f3c65371d.

mysql-test/suite/compat/oracle/r/sp.result

@@ -775,6 +775,18 @@ SELECT @v;
 6
 DROP PROCEDURE p1;
 # Testing the FOR loop statement
+CREATE TABLE t1 (a INT);
+FOR i IN 1 .. 3
+LOOP
+INSERT INTO t1 VALUES (i);
+END LOOP;
+/
+SELECT * FROM t1;
+a
+1
+2
+3
+DROP TABLE t1;
 CREATE FUNCTION f1 (lower_bound INT, upper_bound INT, lim INT) RETURN INT
 AS
 total INT := 0;

mysql-test/suite/compat/oracle/t/sp.test

@@ -847,6 +847,18 @@ DROP PROCEDURE p1;
 
 --echo # Testing the FOR loop statement
 
+CREATE TABLE t1 (a INT);
+DELIMITER /;
+FOR i IN 1 .. 3
+LOOP
+  INSERT INTO t1 VALUES (i);
+END LOOP;
+/
+DELIMITER ;/
+SELECT * FROM t1;
+DROP TABLE t1;
+
+
 DELIMITER /;
 --error ER_PARSE_ERROR
 CREATE FUNCTION f1 (lower_bound INT, upper_bound INT, lim INT) RETURN INT

sql/sql_yacc_ora.yy

@@ -3647,6 +3647,8 @@ sp_unlabeled_control:
         | FOR_SYM
           {
             // See "The FOR LOOP statement" comments in sql_lex.cc
+            if (Lex->maybe_start_compound_statement(thd))
+              MYSQL_YYABORT;
             Lex->sp_block_init(thd); // The outer DECLARE..BEGIN..END block
           }
           sp_for_loop_index_and_bounds