Fix bug with uninitialized undo list of an indirect buffer (Bug#18180).

* buffer.c (Fmake_indirect_buffer): Initialize undo list with the
base buffer's undo list.

2 files changed, 9 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 3f9b4577460..de56e3501d8 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2014-08-05  Dmitry Antipov  <dmantipov@yandex.ru>
+
+        Fix bug with uninitialized undo list of an indirect buffer (Bug#18180).
+        * buffer.c (Fmake_indirect_buffer): Initialize undo list with the
+        base buffer's undo list.
+
 2014-08-03  Dmitry Antipov  <dmantipov@yandex.ru>
 
         Fix bug with an attempt to select uninitialized frame (Bug#18161).
diff --git a/src/buffer.c b/src/buffer.c
index 8077e47fa0b..495f937d83f 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -809,6 +809,9 @@ CLONE nil means the indirect buffer's state is reset to default values.  */)
   set_string_intervals (name, NULL);
   bset_name (b, name);
 
+  /* An indirect buffer shares undo list of its base (Bug#18180).  */
+  bset_undo_list (b, BVAR (b->base_buffer, undo_list));
+
   reset_buffer (b);
   reset_buffer_local_variables (b, 1);