Install fixes for Bug#12764 and Bug#12766.

* window.el (quit-restore-window): If the window has been
created on an existing frame and ended up as the sole window on
that frame, do not delete it (Bug#12764).

* minibuf.c (read_minibuf): Restore current buffer since
choose_minibuf_frame calling Fset_frame_selected_window may
change it (Bug#12766).

lisp/ChangeLog

+2012-10-31  Martin Rudalics  <rudalics@gmx.at>
+
+	* window.el (quit-restore-window): If the window has been
+	created on an existing frame and ended up as the sole window on
+	that frame, do not delete it (Bug#12764).
+
 2012-10-31  Stefan Monnier  <monnier@iro.umontreal.ca>
 	* progmodes/sh-script.el (sh--inside-noncommand-expression):

lisp/window.el

@@ -3556,7 +3556,12 @@ the buffer of WINDOW.  The following values are handled:
 	 quad entry)
     (cond
      ((and (not prev-buffer)
-	   (memq (nth 1 quit-restore) '(window frame))
+	   (or (eq (nth 1 quit-restore) 'frame)
+	       (and (eq (nth 1 quit-restore) 'window)
+		    ;; If the window has been created on an existing
+		    ;; frame and ended up as the sole window on that
+		    ;; frame, do not delete it (Bug#12764).
+		    (not (eq window (frame-root-window window)))))
 	   (eq (nth 3 quit-restore) buffer)
 	   ;; Delete WINDOW if possible.
 	   (window--delete window nil (eq bury-or-kill 'kill)))

src/ChangeLog

+2012-10-31  Martin Rudalics  <rudalics@gmx.at>
+
+	* minibuf.c (read_minibuf): Restore current buffer since
+	choose_minibuf_frame calling Fset_frame_selected_window may
+	change it (Bug#12766).
+
 2012-10-30  Jan Djärv  <jan.h.d@swipnet.se>
 	* frame.c (Fframe_pixel_height): Fix documentation (Bug#12733).

src/minibuf.c

@@ -472,6 +472,10 @@ read_minibuf (Lisp_Object map, Lisp_Object initial, Lisp_Object prompt,
 
   /* Choose the minibuffer window and frame, and take action on them.  */
 
+  /* Prepare for restoring the current buffer since choose_minibuf_frame
+     calling Fset_frame_selected_window may change it (Bug#12766).  */
+  record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+
   choose_minibuf_frame ();
 
   record_unwind_protect (choose_minibuf_frame_1, Qnil);