bug#46325: 27.1; C-d in an rmail summary does not work on the first message

[Francesco Potortì]

>> C-u M-x rmail RET some-mbox-format-mail-file # load a file in rmail
>> <                                         # go to the first message
>> h                                         # create a directory
>> C-d                                       # delete the current message
>> 
>> Since this is the first message, C-d should delete it, display a message
>> saying that there are no previous messages and stay on the deleted
>> message.  Instead, it does (apparently) nothing and stays on the
>> (undeleted) message.
>
>Thanks.
>
>Rmail summary commands never display a message about no next/previous
>undeleted message, only Rmail commands do.
>
>But the main problem -- that C-d doesn't delete the current message --
>is indeed a bug, which was introduced while trying to optimize
>deletion of many messages.  Does the patch below fix the bug with
>deletion?

I cannot reproduce the bug with the patch installed.

Thanks