bug#20353: M-. sometimes jumps in another window

[Dmitry Gutov <dgutov@yandex.ru>]

On 04/17/2015 08:03 AM, Stefan Monnier wrote:

> I tend to use many frames.  When I hit M-. I sometimes get a new popup
> frame asking me to choose a destination.  All good so far.
>
> But sometimes once I choose my destination, xref choose the wrong window
> to display that destination.  More specifically I get the following scenario:

Is the scenario reliable? I haven't seen the result you're describing 
after trying it.

> - Window 1 (in frame 1) showing buffer B.
> - Window 2 (in frame 2) showing buffer B as well.
> - In window 1 I do M-.
> - Get a popup to choose the destination.

Are there some particular settings that make the xref buffer appear in a 
new frame? It always uses the current frame here.

> - Choose some destination D which is also in buffer B.
> - And here's the downer: sometimes Emacs decides to then select window
>    2 to jump to D, instead of using the window 1 for that.

The command that's called in the end is `xref-goto-xref'. Might it be 
that `xref-quit' ends up selecting the wrong frame?