bug#931: 23.0.60; Bug in bytecomp.el: displaying warnings

[martin rudalics]

> +              ;; `display-buffer' usually preserves current-buffer, except
> +              ;; when it ends up doing switch-to-buffer (e.g. pop-up-windows
> +              ;; is nil).

FWIW it's set_window_buffer in

  /* We must select BUFFER for running the window-scroll-functions.
     If WINDOW is selected, switch permanently.
     Otherwise, switch but go back to the ambient buffer afterward.  */
  if (EQ (window, selected_window))
    Fset_buffer (buffer);

which is not very clean (and not documented in `set-window-buffer').

> +              (save-current-buffer
>          (let ((window (display-buffer buffer)))
>            (when (and (markerp warning-series)
>                       (eq (marker-buffer warning-series) buffer))
>              (set-window-start window warning-series))
> -          (sit-for 0)))))))
> +                  (sit-for 0))))))))

This will cause the *Warnings* buffer to flash shortly here and
immediately get replaced when compilation finished.

martin