BUG #6490: Not checking column existence in sub query

The following bug has been logged on the website:

Bug reference: 6490
Logged by: Timofey Anisimov
Email address: anisimovt(at)gmail(dot)com
PostgreSQL version: 9.1.2
Operating system: Linux
Description:

SELECT * FROM table1 where col1 in (select col2 from table2)

if col2 exist in table1 and not exist in table2 there will be no error and
query output all rows from table1;