Ora-00600 error when dropping a table

Question

Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
When I tried to drop a table, I got 600 error:
SQL> desc DEV.ATTR_IDX$EX
Name Null? Type
NODE_ID NOT NULL NUMBER
COL1 NUMBER
SQL> show user;
USER is "DEV"
SQL> select count(*) from DEV.ATTR_IDX$EX;
COUNT(*)
0
SQL> drop table DEV.ATTR_IDX$EX;
drop table DEV.ATTR_IDX$EX
ERROR at line 1:
ORA-00600: internal error code, arguments: [15265], [], [], [], [], [], [], [],
SQL> drop table DEV.ATTR_IDX$EX purge;
drop table DEV.ATTR_IDX$EX purge
ERROR at line 1:
ORA-00600: internal error code, arguments: [15265], [], [], [], [], [], [], [],
I guess this is because it had a parent table, which I dropped (I used "drop table <parent_table>", and it did not give me error, very strange).
SQL> select dbms_metadata.get_ddl('TABLE','ATTR_IDX$EX') from dual;
DBMS_METADATA.GET_DDL('TABLE','ATTR_IDX$EX')
CREATE TABLE "DEV"."ATTR_IDX$EX"
( "NODE_ID" NUMBER NOT NULL ENABLE,
"COL1" NUMBER,
FOREIGN KEY ("NODE_ID")
REFERENCES () ON DELETE CASCADE ENABLE
) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS"
MONITORING
Try to drop FK constraints yields the same error.
So now how can I drop this table table, any work around?
Thanks.

Answer 1

This is a bug. There is no Patch avaialble for this yet. This error is seen where recyclebin is enabled. Possible workaround is to disable the recyclebin.
This happens with the dictionary corruption due to inconsistency between obj$ and seg$.
This is a correct answer but still i would suggest to contact Oracle support.