(Qfont_spec, Qfont_entity, Qfont_object): Extern them.

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

diff --git a/src/marker.c b/src/marker.c
index 3184978..c00663a 100644 (file)
--- a/src/marker.c
+++ b/src/marker.c
@@ -1,12 +1,12 @@
 /* Markers: examining, setting and deleting.
    Copyright (C) 1985, 1997, 1998, 2001, 2002, 2003, 2004,
-                 2005, 2006, 2007  Free Software Foundation, Inc.
+                 2005, 2006, 2007, 2008  Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
 GNU Emacs is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
 any later version.
 
 GNU Emacs is distributed in the hope that it will be useful,
@@ -23,7 +23,7 @@ Boston, MA 02110-1301, USA.  */
 #include <config.h>
 #include "lisp.h"
 #include "buffer.h"
-#include "charset.h"
+#include "character.h"
 
 /* Record one cached position found recently by
    buf_charpos_to_bytepos or buf_bytepos_to_charpos.  */
@@ -452,9 +452,12 @@ Returns nil if MARKER points into a dead buffer.  */)
   if (XMARKER (marker)->buffer)
     {
       XSETBUFFER (buf, XMARKER (marker)->buffer);
-      /* Return marker's buffer only if it is not dead.  */
-      if (!NILP (XBUFFER (buf)->name))
-       return buf;
+      /* If the buffer is dead, we're in trouble: the buffer pointer here
+        does not preserve the buffer from being GC'd (it's weak), so
+        markers have to be unlinked from their buffer as soon as the buffer
+        is killed.  */
+      eassert (!NILP (XBUFFER (buf)->name));
+      return buf;
     }
   return Qnil;
 }