X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=src%2Fundo.c;h=dd9a4439d5f9da24f2255b4dfb6b130e25e99928;hb=bd3ad0d3610ae0c6245bcd4240115442c8f47180;hp=6c12abf628f4dc96132690e3fbc3fa970900b79c;hpb=6883ee56ec887c2c48abe5b06b5e66aa74031910;p=chise%2Fxemacs-chise.git

diff --git a/src/undo.c b/src/undo.c
index 6c12abf..dd9a443 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -75,7 +75,9 @@ undo_prelude (struct buffer *b, int hack_pending_boundary)
   if (EQ (b->undo_list, Qt))
     return (0);
 
-  if (NILP (last_undo_buffer) || b != XBUFFER (last_undo_buffer))
+  if (NILP (last_undo_buffer)
+      || (BUFFER_BASE_BUFFER (b)
+	  != BUFFER_BASE_BUFFER (XBUFFER (last_undo_buffer))))
     {
       undo_boundary (b);
       XSETBUFFER (last_undo_buffer, b);