demo@ORA11G> create table t (x int, y int);

Table created.

demo@ORA11G> create bitmap index t_idx on t(x);

Index created.

demo@ORA11G> insert into t(x,y) values(1,1);

1 row created.

demo@ORA11G> declare
  2     pragma autonomous_transaction;
  3  begin
  4     insert into t(x,y) values(1,55);
  5     rollback;
  6  end;
  7  /
declare
*
ERROR at line 1:
ORA-00060: deadlock detected while waiting for resource
ORA-06512: at line 4


demo@ORA11G>