ORA-00600: internal error code, arguments: [kcblasm_1], [103]

Backgroup: Oracle Database 10g Release 10.2.0.5.0 - 64bit Production on Windows 2003 server.

Saw this error in the log: ORA-00600: internal error code, arguments: [kcblasm_1], [103], [], [], [], [], [], []

the query was:
    create table ab as
    select a.col1, b.col2
    from a, b
    where a.col1=b.col2

Both table have indexes on the joint columns, table a has about 12 millions recores and table b has about 3 millions.

Checked out the support doc, and just wonering if don't know any patch, is there any workaround? Right, already set _gby_hash_aggregation_enabled=false, or is there another parameter need to set, instead of this one?