bug#59943: 30.0.50; ERC 5.5+: Add visual indicator to ERC keep-place

["J.P." <jp@neverwas.me>]

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

>>From emacs -Q
>
>   1. M-: (setopt erc-keep-place-indicator-follow t) RET
>      M-x erc RET ... RET
>
>   2. In the server buffer, do M-x erc-keep-place-indicator-mode RET
>
>   3. Scroll "up" to hide the indicator but not so far that point moves
>      beyond `erc-insert-marker'
>
>   4. Switch away to another buffer and then back
>
>   5. Notice the indicator fails to update
>
> This happens because `keep-place-indicator' is a local module, and it
> adds `erc--keep-place-indicator-on-window-buffer-change' to the hook
> `window-buffer-change-functions' locally. But that function needs to run
> in the buffer that's being switched to, which may not have the mode
> enabled (and thus not have the hook member available). Subscribing to
> the hook globally should fix the problem. There are also at least two
> bugs affecting the integration between `keep-place-indicator' and
> `keep-place'. The attached patch attempts to address these as well.

This has been installed as:

  fad2d1e2acc * Use global window hook for erc-keep-place-indicator

This bug is already closed.