bug#20034: 25.0.50; [PATCH] gud never displays a source buffer over the gud window

[martin rudalics]

> Sometime between emacs 23 and emacs 24 the behavior of display-buffer
> changed to show the buffer in the current window at times (emacs 23
> always used a different window).

No.  `display-buffer' displays the buffer in the selected window just as
often as before the changes you mention.

> On my machine this switches to tst.c on top of the gud buffer, replacing
> gud in its window. With the attached patch this does not happen.
>
> This is similar, but not identical to bug
>
>   http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17675
>
> The proposed fix in that bug does not handle the above recipe.

Would your fix handle Bug#17675 as well?  And maybe some of the related
bugs in this area (see Bug#19901, for a recent example)?  There also was
a proposal to only "softly" dedicate some gud window to its buffer.  See
the thread entitled "Use of dedicated windows in gdb-mi.el".

martin