BUG #2840: \set HISTCONTROL ignoredups doesn't work in psql

The following bug has been logged online:

Bug reference: 2840
Logged by: Ned T. Crigler
Email address: crigler(at)users(dot)sourceforge(dot)net
PostgreSQL version: 8.2
Operating system: Linux (Debian unstable)
Description: \set HISTCONTROL ignoredups doesn't work in psql
Details:

In psql, doing:

\set HISTCONTROL ignoredups
select 1;
select 1;
select 1;
select 1;
select 1;

adds every select statement into the history, instead of ignoring the
duplicate statements.