1 files changed, 9 insertions, 4 deletions

diff --git a/src/window.c b/src/window.c
index 5dced198811..e7f2ed93fd3 100644
--- a/src/window.c
+++ b/src/window.c
@@ -3780,7 +3780,9 @@ SIZE includes that window's scroll bar, or the divider column to its right.
 Interactively, all arguments are nil.
 
 Returns the newly created window (which is the lower or rightmost one).
-The upper or leftmost window is the original one and remains selected.
+The upper or leftmost window is the original one, and remains selected
+if it was selected before.
+
 See Info node `(elisp)Splitting Windows' for more details and examples.*/)
      (window, size, horflag)
      Lisp_Object window, size, horflag;
@@ -4895,6 +4897,8 @@ window_scroll_pixel_based (window, n, whole, noerror)
             }
           else if (noerror)
             return;
+          else if (n < 0)       /* could happen with empty buffers */
+            Fsignal (Qbeginning_of_buffer, Qnil);
           else
             Fsignal (Qend_of_buffer, Qnil);
         }
@@ -5796,6 +5800,7 @@ struct saved_window
   Lisp_Object left_margin_cols, right_margin_cols;
   Lisp_Object left_fringe_width, right_fringe_width, fringes_outside_margins;
   Lisp_Object scroll_bar_width, vertical_scroll_bar_type;
+  Lisp_Object dedicated;
 };
 
 #define SAVED_WINDOW_N(swv,n) \
@@ -5806,9 +5811,7 @@ DEFUN ("window-configuration-p", Fwindow_configuration_p, Swindow_configuration_
      (object)
      Lisp_Object object;
 {
-  if (WINDOW_CONFIGURATIONP (object))
-    return Qt;
-  return Qnil;
+  return WINDOW_CONFIGURATIONP (object) ? Qt : Qnil;
 }
 
 DEFUN ("window-configuration-frame", Fwindow_configuration_frame, Swindow_configuration_frame, 1, 1, 0,
@@ -6030,6 +6033,7 @@ the return value is nil.  Otherwise the value is t.  */)
           w->fringes_outside_margins = p->fringes_outside_margins;
           w->scroll_bar_width = p->scroll_bar_width;
           w->vertical_scroll_bar_type = p->vertical_scroll_bar_type;
+          w->dedicated = p->dedicated;
           XSETFASTINT (w->last_modified, 0);
           XSETFASTINT (w->last_overlay_modified, 0);
 
@@ -6299,6 +6303,7 @@ save_window_save (window, vector, i)
       p->fringes_outside_margins = w->fringes_outside_margins;
       p->scroll_bar_width = w->scroll_bar_width;
       p->vertical_scroll_bar_type = w->vertical_scroll_bar_type;
+      p->dedicated = w->dedicated;
       if (!NILP (w->buffer))
         {
           /* Save w's value of point in the window configuration.