1 files changed, 17 insertions, 9 deletions

diff --git a/src/buffer.c b/src/buffer.c
index aa3fcf8c234..8728b418812 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1769,7 +1769,7 @@ cleaning up all windows currently displaying the buffer to be killed. */)
      since anything can happen within do_yes_or_no_p.  */
 
   /* Don't kill the minibuffer now current.  */
-  if (EQ (buffer, XWINDOW (minibuf_window)->buffer))
+  if (EQ (buffer, XWINDOW (minibuf_window)->contents))
     return Qnil;
 
   /* When we kill an ordinary buffer which shares it's buffer text
@@ -1820,7 +1820,7 @@ cleaning up all windows currently displaying the buffer to be killed. */)
   /* If the buffer now current is shown in the minibuffer and our buffer
      is the sole other buffer give up.  */
   XSETBUFFER (tem, current_buffer);
-  if (EQ (tem, XWINDOW (minibuf_window)->buffer)
+  if (EQ (tem, XWINDOW (minibuf_window)->contents)
       && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil)))
     return Qnil;
 
@@ -2394,8 +2394,9 @@ DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text,
            BUF_MARKERS(buf) should either be for `buf' or dead.  */
         eassert (!m->buffer);
   }
-  { /* Some of the C code expects that w->buffer == w->pointm->buffer.
-       So since we just swapped the markers between the two buffers, we need
+  { /* Some of the C code expects that both window markers of a
+       live window points to that window's buffer.  So since we
+       just swapped the markers between the two buffers, we need
        to undo the effect of this swap for window markers.  */
     Lisp_Object w = Fselected_window (), ws = Qnil;
     Lisp_Object buf1, buf2;
@@ -2405,12 +2406,19 @@ DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text,
       {
         ws = Fcons (w, ws);
         if (MARKERP (XWINDOW (w)->pointm)
-            && (EQ (XWINDOW (w)->buffer, buf1)
-                || EQ (XWINDOW (w)->buffer, buf2)))
+            && (EQ (XWINDOW (w)->contents, buf1)
+                || EQ (XWINDOW (w)->contents, buf2)))
           Fset_marker (XWINDOW (w)->pointm,
                        make_number
-                       (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))),
-                       XWINDOW (w)->buffer);
+                       (BUF_BEGV (XBUFFER (XWINDOW (w)->contents))),
+                       XWINDOW (w)->contents);
+        if (MARKERP (XWINDOW (w)->start)
+            && (EQ (XWINDOW (w)->contents, buf1)
+                || EQ (XWINDOW (w)->contents, buf2)))
+          Fset_marker (XWINDOW (w)->start,
+                       make_number
+                       (XBUFFER (XWINDOW (w)->contents)->last_window_start),
+                       XWINDOW (w)->contents);
         w = Fnext_window (w, Qt, Qt);
       }
   }
@@ -3893,7 +3901,7 @@ modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end)
   if (buffer_window_count (buf) > 0)
     {
       /* ... it's visible in other window than selected,  */
-      if (buf != XBUFFER (XWINDOW (selected_window)->buffer))
+      if (buf != XBUFFER (XWINDOW (selected_window)->contents))
         windows_or_buffers_changed = 1;
       /* ... or if we modify an overlay at the end of the buffer
          and so we cannot be sure that window end is still valid.  */