bug#33870: 27.0.50; xref-goto-xref not configurable

[João Távora]

Dmitry Gutov <dgutov@yandex.ru> writes:

> On 27.12.2018 2:05, João Távora wrote:
>> You can read up the whole bug here:
>>
>>      https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28814
>>
>> I quote from that thread:
>>
>>      Here are two very simple Emacs -Q recipes that demonstrate [the bug]
>
> Does this work well for everybody?
>
> diff --git a/lisp/progmodes/xref.el b/lisp/progmodes/xref.el
> index c71802c918..85d4325d9e 100644
> --- a/lisp/progmodes/xref.el
> +++ b/lisp/progmodes/xref.el
> @@ -494,7 +494,8 @@ xref--show-pos-in-buf
>              (or (and (window-live-p xref--original-window)
>                       xref--original-window)
>                  (selected-window))
> -          (display-buffer buf action))
> +          (pop-to-buffer buf action)
> +          (selected-window))
>        (xref--goto-char pos)
>        (run-hooks 'xref-after-jump-hook)
>        (let ((buf (current-buffer)))

It works for those two recipes, because `action' is passed directly to
display-buffer.  Don't know:

* if it might be introducing a new untested corner case because of the
  "recording" of select-window inside.  Perhaps this corner case is
  unwanted, but it might also be wanted (and we didn't know).

* if it will bring Yuri what he wants.  Doesn't seem like it will, since
  display buffer is given an explicit ACTION.

João