BUG #6666: pg_upgrade 9.2beta1 plpython/plpython2

The following bug has been logged on the website:

Bug reference: 6666
Logged by: Adrian Klaver
Email address: adrian(dot)klaver(at)gmail(dot)com
PostgreSQL version: 9.0.7
Operating system: Linux/OpenSuse 12.1
Description:

I thought this was fixed in:

http://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=cfe443ab9d42b4ffe950608f01c3a4bdc2895c7b

I just tried an upgrade from 9.0.7 to 9.2beta1 using pg_upgrade. I ran it
first with -c and everything passed. When I did a live upgrade it failed
with this message in pg_upgrade_restore.log:

CREATE FUNCTION plpython_call_handler() RETURNS language_handler
LANGUAGE c
AS '$libdir/plpython', 'plpython_call_handler';
psql:pg_upgrade_dump_db.sql:13541: ERROR: could not access file
"$libdir/plpython": No such file or directory

That is indeed true, there is no plpython, there is plpython2 instead. I
created a symlink plpython --> plpython2 and the upgraded succeeded after a
re-initdb of the new cluster.