Fix EOLs broken with last commit.

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

diff --git a/src/undo.c b/src/undo.c
index 63daf1f..d29ba17 100644 (file)
--- a/src/undo.c
+++ b/src/undo.c
@@ -79,7 +79,13 @@ record_point (pt)
   if (NILP (pending_boundary))
     pending_boundary = Fcons (Qnil, Qnil);
 
-  if (current_buffer != last_undo_buffer)
+  if ((current_buffer != last_undo_buffer)
+      /* Don't call Fundo_boundary for the first change.  Otherwise we
+        risk overwriting last_boundary_position in Fundo_boundary with
+        PT of the current buffer and as a consequence not insert an
+        undo boundary because last_boundary_position will equal pt in
+        the test at the end of the present function (Bug#731).  */
+      && (MODIFF > SAVE_MODIFF))
     Fundo_boundary ();
   last_undo_buffer = current_buffer;