Add bug reference.

[bpt/emacs.git] / src / xdisp.c

diff --git a/src/xdisp.c b/src/xdisp.c
index 5509d1e..ee5ecba 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -14393,13 +14393,6 @@ try_window_reusing_current_matrix (w)
        if (display_line (&it))
          last_text_row = it.glyph_row - 1;
 
-      /* Give up If point isn't in a row displayed or reused.  */
-      if (w->cursor.vpos < 0)
-       {
-         clear_glyph_matrix (w->desired_matrix);
-         return 0;
-       }
-
       /* If point is in a reused row, adjust y and vpos of the cursor
         position.  */
       if (pt_row)
@@ -14408,6 +14401,16 @@ try_window_reusing_current_matrix (w)
          w->cursor.y -= first_reusable_row->y - start_row->y;
        }
 
+      /* Give up if point isn't in a row displayed or reused.  (This
+        also handles the case where w->cursor.vpos < nrows_scrolled
+        after the calls to display_line, which can happen with scroll
+        margins.  See bug#1295.)  */
+      if (w->cursor.vpos < 0)
+       {
+         clear_glyph_matrix (w->desired_matrix);
+         return 0;
+       }
+
       /* Scroll the display.  */
       run.current_y = first_reusable_row->y;
       run.desired_y = WINDOW_HEADER_LINE_HEIGHT (w);
@@ -25059,9 +25062,10 @@ all the functions in the list are called, with the frame as argument.  */);
 
   DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions,
     doc: /* List of functions to call before redisplaying a window with scrolling.
-Each function is called with two arguments, the window
-and its new display-start position.  Note that the value of `window-end'
-is not valid when these functions are called.  */);
+Each function is called with two arguments, the window and its new
+display-start position.  Note that these functions are also called by
+`set-window-buffer'.  Also note that the value of `window-end' is not
+valid when these functions are called.  */);
   Vwindow_scroll_functions = Qnil;
 
   DEFVAR_LISP ("window-text-change-functions",