Bug report : Navigator display wrong messages in package body

Question

Just run some code , you can see the Navigator display wrong messages in the package body,but the package work fine in sqlplus / toad or other tools.
create or replace package SIMPLE AS
Procedure simple_proc ;
END;
create or replace package body SIMPLE AS
Procedure simple_proc
IS
v_tname varchar2(100);
begin
SELECT PERCENTILE_disc(0.5) WITHIN GROUP (ORDER BY tabtype DESC)
          INTO v_tname
          FROM tab;
END simple_proc;
END;
Then open the package body in the Navigator (Connection Pane==> Connection Name ==> Packages ==> Simple Body ) , and show the error message:
Unexpected token
Missing Expression
But if I just create the procedure out of the package , it work fine.
CREATE OR REPLACE
Procedure simple_proc
IS
v_tname varchar2(100);
begin
SELECT PERCENTILE_disc(0.5) WITHIN GROUP (ORDER BY tabtype DESC)
          INTO v_tname
          FROM tab;
END simple_proc;
/

Answer 1

This has already been discussed a number of times (see http://forums.oracle.com/forums/search.jspa?objID=f260&q=Unexpected+token).
As I understand it, it is related to the parser that SQL Developer is using to display the package decomposition in the navigator not coping with the full PL/SQL and SQL syntax (largely analytical functions from memory).