I attach a patch for pg_upgrade. This does two things:

I attach a patch for pg_upgrade.  This does two things:

1. check whether the program is being executed in $PGDATA/..  This is
   necessary if the data tree is not in the standard place, as is the
   case with the Debian distribution (because of Debian policy).

2. give a clearer error message if the dumped data structure fails to
   be loaded.

Oliver Elphick