bug#55540: 29.0.50; ERC launches autojoin-channels in current frame instead of original frame

[Pankaj Jangid <pankaj@codeisgreat.org>]

"J.P." <jp@neverwas.me> writes:

>>> Thus, if no one objects within the next week or so, I will add the patch
>>> below or similar to trunk (and what will become ERC 5.5), along with a
>>> related NEWS entry. Thanks.
>
> This has been carried out.
>
> Pankaj, all that remains is your frame stuff. If problems persist and/or
> you've lost interest, please let us know, so I can act accordingly.
> Thanks.

Now the behaviour is acceptable when "erc-autojoin-channels-alist" is
set to nil. i.e. the frame in which I launched "erc-tls" opens the erc
window instead of occupying the current frame.

But when I have few channels in "erc-autojoin-channels-alist" then the
channels are still openning in the current frame instead of the
dedicated frame that I started for "erc-tls". Is there some setting that
I missed in the conversation for this? My current "erc" related
settings are:

--8<---------------cut here---------------start------------->8---
(setq erc-prompt-for-password nil
      erc-prompt (lambda () (concat "[" (buffer-name) "]")))
(eval-when-compile (require 'erc-services))
(setq erc-prompt-for-nickserv-password nil
      erc-use-auth-source-for-nickserv-password t)
(setq erc-server "irc.libera.chat")
(setq erc-port 6697)
(setq erc-nick "my-nick")
(setq erc-user-full-name "My Full Name")
(eval-when-compile (require 'erc-join))
(setq erc-autojoin-channels-alist
      '(("libera.chat" "#emacs" "#erc" "#gnus")))
--8<---------------cut here---------------end--------------->8---