(save_restriction_restore): Update the (pt/begv/vz)_markers

when applicable (bug#4851).

src/ChangeLog

 2009-11-03  Stefan Monnier  <monnier@iro.umontreal.ca>
+	* editfns.c (save_restriction_restore): Update the (pt/begv/vz)_markers
+	when applicable (bug#4851).
+
 	* lisp.h: Make USE_LSB_TAG work with USE_LISP_UNION_TYPE.
 	(P_): Support for prototypes is now required.
@@ -10,14 +13,14 @@
 2009-10-30  Eli Zaretskii  <eliz@gnu.org>
-	* s/msdos.h (SYSTEM_PURESIZE_EXTRA): Redefine to waste less pure
-	space.
+	* s/msdos.h (SYSTEM_PURESIZE_EXTRA): Redefine to waste less pure space.
 2009-10-30  Dan Nicolaescu  <dann@ics.uci.edu>
 	* puresize.h (BASE_PURESIZE): Increase to 1470000.
-	* lread.c (Fload): Purecopy the file name when building Vpreloaded_file_list.
+	* lread.c (Fload): Purecopy the file name when building
+	Vpreloaded_file_list.
 2009-10-29  Jason Rumney  <jasonr@wanchan.jasonrumney.net>
@@ -55,7 +58,7 @@
 	* dired.c (Ffile_attributes): Simplify now that FIXNUM_OVERFLOW_P
 	can properly handle unsigned types.
-	(make_uid, make_gid): Removed.
+	(make_uid, make_gid): Remove.
 	* lisp.h (FIXNUM_OVERFLOW_P): Fix last change to handle unsigned
 	types again.
@@ -108,10 +111,11 @@
 	(handle_one_xevent): Set pending_event_wait.eventtype to 0 if we
 	see pending_event_wait.eventtype.
 	(handle_one_xevent): Don't change gravity when parent changes.
-	(x_new_font): Call change_frame_size with new rows/columns before we try
-	to resize the frame.
+	(x_new_font): Call change_frame_size with new rows/columns before we
+	try to resize the frame.
 	(x_wait_for_event): New function.
-	(x_set_window_size_1): Don't change gravity unless change_gravity is set.
+	(x_set_window_size_1): Don't change gravity unless change_gravity
+	is set.
 	Call XResizeWindow with FRAME_OUTER_WINDOW.  If we are visible,
 	don't change frame size, instead wait for the ConfigureNotify.
 	(x_set_window_size): Call x_set_window_size_1 for USE_X_TOOLKIT also.
@@ -126,7 +130,7 @@
 	* gtkutil.c (xg_frame_set_char_size): Flush events and call
 	x_wait_for_event.
-	(flush_and_sync): Removed again.
+	(flush_and_sync): Remove again.
 	(xg_get_font_name): Suggest monospace if no previous font is known.
 2009-10-20  Stefan Monnier  <monnier@iro.umontreal.ca>
@@ -329,8 +333,7 @@
 	(ns_findfonts, nsfont_list_family): Use long format in printf, and
 	cast argument.
 	(nsfont_open): Use ns_char_width() everywhere.
-	(ns_uni_to_glyphs, NSGlyphStorage): Use NS[U]Integer where
-	appropriate.
+	(ns_uni_to_glyphs, NSGlyphStorage): Use NS[U]Integer where appropriate.
 	* nsgui.h (NSPoint, NSSize) [!__OBJC__]: Define and use CGFloat.
@@ -399,7 +402,7 @@
 2009-10-02  Michael Albinus  <michael.albinus@gmx.de>
-	* lisp.h (Qdelete_directory_internal): Removed, because it is not
+	* lisp.h (Qdelete_directory_internal): Remove, because it is not
 	used anymore outside fileio.c.
 	* w32fns.c (Fsystem_move_file_to_trash): Use delete-directory.
@@ -474,8 +477,8 @@
 2009-09-24  Juanma Barranquero  <lekktu@gmail.com>
 	* frame.c (xrdb_get_resource): Return nil for empty string resources;
-	some parts of Emacs code (like font selection) don't grok them.  See
-	http://lists.gnu.org/archive/html/emacs-devel/2009-09/msg00528.html
+	some parts of Emacs code (like font selection) don't grok them.
+	See http://lists.gnu.org/archive/html/emacs-devel/2009-09/msg00528.html
 2009-09-24  Andreas Schwab  <schwab@redhat.com>

src/editfns.c

@@ -3275,12 +3275,26 @@ Lisp_Object
 save_restriction_restore (data)
      Lisp_Object data;
 {
+  struct buffer *cur = NULL;
+  struct buffer *buf = (CONSP (data)
+			? XMARKER (XCAR (data))->buffer
+			: XBUFFER (data));
+
+  if (buf && buf != current_buffer && !NILP (buf->pt_marker))
+    { /* If `buf' uses markers to keep track of PT, BEGV, and ZV (as
+	 is the case if it is or has an indirect buffer), then make
+	 sure it is current before we update BEGV, so
+	 set_buffer_internal takes care of managing those markers.  */
+      cur = current_buffer;
+      set_buffer_internal (buf);
+    }
+
   if (CONSP (data))
     /* A pair of marks bounding a saved restriction.  */
     {
       struct Lisp_Marker *beg = XMARKER (XCAR (data));
       struct Lisp_Marker *end = XMARKER (XCDR (data));
-      struct buffer *buf = beg->buffer; /* END should have the same buffer. */
+      eassert (buf == end->buffer);
 
       if (buf /* Verify marker still points to a buffer.  */
 	  && (beg->charpos != BUF_BEGV (buf) || end->charpos != BUF_ZV (buf)))
@@ -3305,8 +3319,6 @@ save_restriction_restore (data)
   else
     /* A buffer, which means that there was no old restriction.  */
     {
-      struct buffer *buf = XBUFFER (data);
-
       if (buf /* Verify marker still points to a buffer.  */
 	  && (BUF_BEGV (buf) != BUF_BEG (buf) || BUF_ZV (buf) != BUF_Z (buf)))
 	/* The buffer has been narrowed, get rid of the narrowing.  */
@@ -3318,6 +3330,9 @@ save_restriction_restore (data)
 	}
     }
 
+  if (cur)
+    set_buffer_internal (cur);
+
   return Qnil;
 }