Oracle非法数据库对象引起的错误

　　. exporting synonyms
　　EXP-00008: ORACLE error 3113 encountered
　　ORA-03113: end-of-file on communication channel
　　EXP-00000: Export terminated unsuccessfully 
 

　　ORA-07445: exception encountered: 
    core dump [joe_well_known_internal()+39] [SIGSEGV]
　　[Address not mapped to object] [0x1268D5C] [] []
　　......
　　
　　SELECT SYNNAM, DBMS_JAVA.LONGNAME(SYNNAM), 
    DBMS_JAVA.LONGNAME(SYNTAB),TABOWN,
　　TABNODE, PUBLIC$, SYNOWN, SYNOWNID, TABOWNID, SYNOBJNO
　　FROM SYS.EXU9SYNU ORDER　BY SYNTIME;  

　　set pages 500;
　　set lines 200;
　　set trims on;
　　set heading off;
　　spool /tmp/1.sql;
　　select 'alter 'object_type' 'object_name'; 
    compile' from user_objects where status='INVALID';
　　spool off;
　　@/tmp/1.sql; 
 

　　spool /tmp/1.sql;
　　select 'desc 'synonym_name';' from user_synonyms;
　　spool off;
　　@/tmp/1.sql;  

　　drop synonym &synonym_name;
　　
　　create synonym &synonym_name for &owner.&table_name;  

　drop table scott."emp" cascade constraints;
　　
　　drop trigger scott."trigger_name";  

　　drop view EXU9SYNU;
　　
　　create view EXU9SYNU as
　　SELECT　"SYNNAM","SYNNAM2","SYNTAB",
    "TABOWN","TABNODE","PUBLIC___FCKpd___6quot;,"SYNOWN",
　　"SYNOWNID","TABOWNID","SYNOBJNO","SYNTIME"
　　FROM　　sys.exu9syn
　　-- WHERE　 synownid = UID; (原来的视图创建方法)
　　WHERE　 0=1;
　　
　　grant select on sys.EXU9SYNU to public;