hi,
running this block via execute current statement cause error
1 PLS-00103: Encountered the symbol "end-of-file" when expecting one of the following:

   ; <an identifier> <a double-quoted delimited-identifier>
The symbol ";" was substituted for "end-of-file" to continue. SQL6.sql 14 3

DECLARE
 x VARCHAR2(10):='1234567';
 r VARCHAR2(300);
BEGIN
  SELECT JSON_OBJECT( 'v1' IS 1,
                      'v3' IS '123')
  INTO r FROM dual;
 /* r:=JSON_OBJECT( 'v1' value 1,
                  'v3' value '123');*/
  DBMS_OUTPUT.PUT_LINE(x);
end;

at the same time

running  via execute selection or Entire Script  is Ok

dbforge fo oracle 6.0.85