RE: Some codes refer slot()->{'slot_name'} but it is not defined

Dear Fujii-san,

> -is($node_primary->slot('dropme_slot')->{'slot_name'},
> -    undef, 'logical slot was actually dropped on standby');
> +is($node_primary->slot('dropme_slot')->{'plugin'},
> +    '', 'logical slot was actually dropped on standby');
> 
> This seems like a separate issue from what your patch is addressing,
> but since this test is meant to confirm that the slot was dropped
> on the standby, shouldn't node_primary be node_replica instead?

You are right. It has been missed 8 years ago, let's fix now.

BTW, the issue exists for all supported branches. How do you feel
to backpatch them? PSA all patch set.

Best regards,
Hayato Kuroda
FUJITSU LIMITED