SQL Navigator does not accept a kind of procedure that does accept Oracle (4335679)

SQL Navigator does not accept a kind of procedure that does accept Oracle ( and Toad)
To reproduce the problem please create the following procedure in SQL Plus or Toad :

CREATE OR REPLACE PROCEDURE test_loop2
AS
BEGIN
LOOP
LOOP
BEGIN
NULL;
EXCEPTION
WHEN OTHERS
THEN
NULL;
END LOOP;
END LOOP;
END LOOP;
END;
/

The procedure is succesfully compiled .

Then go to SQL Navigator 6.2:
Select this procedure in the navigator , r click and select extract DDL.
Then run this procedure.
You will get an error :

ORA-24344: success with compilation error
13/15 PLS-00103: Encountered the symbol end-of-file when expecting one of the following:
begin case declare end exit for goto if loop mod null pragma
raise return select update while with <an identifier>
<a double-quoted delimited-identifier> <a bind variable> <<
close current delete fetch lock insert open rollback
savepoint set sql execute commit forall merge pipe

ORA-00900: invalid SQL statement

Take into account that this procedure has a peculiarity.
The inner anonymous block is like this:

BEGIN
NULL;
EXCEPTION
WHEN OTHERS
THEN
NULL;
END LOOP; -- END LOOP instead END

instead of (the usual way):

BEGIN
NULL;
EXCEPTION
WHEN OTHERS
THEN
NULL;
END; -- HERE

Somehow Oracle accepts this and assumes that the end loop is an end.