A SQL with a hidden error

This test case is built from a real life DBA task.

SQL> create table t as select rownum id, object_name from dba_objects where rownum <=10;

Table created.

SQL> create table t2 as select rownum id1, object_name from dba_objects where rownum <=5;

Table created.


Our intention was to do the following SQL with a subqeury:

SQL> select * from t where id in ( select id1 from t2);

ID OBJECT_NAME
---------- ------------------------------
1 TAB$
2 I_IND1
3 I_COBJ#
4 USER$
5 I_OBJ1


Instead, we executed the following SQL, which has a typo . However, it got executed without error:

SQL> select * from t where id in ( select id from t2);

ID OBJECT_NAME
---------- ------------------------------
1 TAB$
2 I_IND1
3 I_COBJ#
4 USER$
5 I_OBJ1
6 I_PROXY_ROLE_DATA$_2
7 C_FILE#_BLOCK#
8 C_OBJ#
9 BOOTSTRAP$
10 I_ICOL1

10 rows selected.

Isn't it better Oracle can throw error for this SQL?