Aggregation/duplicate elimination bug in 8.1.6

Looks like something funny happening with
the optimizer here. Anyone know if this
is fixed in a later release?
-dll
SQL*Plus: Release 8.1.6.0.0 - Production on Tue Sep 4 17:57:37 2001
(c) Copyright 1999 Oracle Corporation. All rights reserved.
Connected to:
Oracle8i Enterprise Edition Release 8.1.6.1.0 - Production
With the Partitioning option
JServer Release 8.1.6.0.0 - Production
SQL> rem Create a table and put two rows into it.
SQL> create table t (c1 number, c2 number, c3 number);
Table created.
SQL> insert into t (c1, c2, c3) values (1201, 13.196632, 17.7637174);
1 row created.
SQL> insert into t (c1, c2, c3) values (1201, 13.196632, 17.7637174);
1 row created.
SQL> commit;
Commit complete.
SQL>
SQL> rem Create a view on the table.
SQL> create view v2 as
2 select v1.c0 as c0, v1.c1 as c1,
3 sum(v1.c2) over (partition by v1.c0
4 order by v1.c1
5 rows between unbounded preceding and current row) as c2
6 from (select distinct v0.c1 as c0, v0.c2 as c1, v0.c3 as c2 from t v0) v1;
View created.
SQL>
SQL> rem Show the view results.
SQL> rem Note the largest value of c2.
SQL> select * from v2;
C0 C1 C2
1201 13.196632 17.7637174
SQL>
SQL> rem Now issue an aggregate query on the view to
SQL> rem return the max of c2.
SQL> rem Note that this is the wrong result. Apparently
SQL> rem the duplicate elimination was forgotten.
SQL> select v2.c0 as c0, v2.c1 as c1, max(v2.c2) as c2
2 from v2 v2
3 group by v2.c0, v2.c1;
C0 C1 C2
1201 13.196632 35.5274348
SQL>
SQL> rem If we add another grouped expression to the select list,
SQL> rem the results for c2 become correct, however.
SQL> 1
1* select v2.c0 as c0, v2.c1 as c1, max(v2.c2) as c2
SQL> a , count(v2.c2) as c3
1* select v2.c0 as c0, v2.c1 as c1, max(v2.c2) as c2, count(v2.c2) as c3
SQL> /
C0 C1 C2 C3
1201 13.196632 17.7637174 1
SQL>
null

I can confirm the same problem in 8.1.7.1.0.

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