bug#23305: 25.0.92; Right-clicking on ERC menu bar uses wrong window

[martin rudalics]

> When using ERC, I'll be in a buffer, say #emacs, with many other channels
> mentioned on my mode-line, for example:
>
>      [##h:4,#n:18,*:1]
>
> In Emacs 24.5, if I right-click on one of these labels, it selects that buffer
> *in the window whose mode-line I clicked on*.
>
> In the Emacs 25.1 pretest, right-clicking on a labels appears to change a
> random window within the buffer:

"within the buffer"?

> neither the currently selected window, nor
> the window whose mode-line I click.

IIUC this means that someone calls ‘display-buffer’ (indirectly, maybe).
Can you find out who?

martin