>
> Ooh.
>
> If you SELECT FOR UPDATE a tuple in 9.2, bit 0x0040 gets set in
> infomask, and nothing else. If you pg_upgrade and later try to freeze
> such a tuple, it will fail with the error reported.
>
> The correct test to use is HEAP_XMAX_IS_LOCKED_ONLY, which also tests
> for the above condition.
>
> I will verify this theory and push a patch shortly, if it proves
> correct.
>
>
Oh good news :). I have my old 9.2 around if you need me to do more
testing on it.