1 files changed, 9 insertions, 1 deletions

diff --git a/src/window.c b/src/window.c
index 25656307648..58ab3ee14a0 100644
--- a/src/window.c
+++ b/src/window.c
@@ -1,7 +1,7 @@
 /* Window creation, deletion and examination for GNU Emacs.
    Does not include redisplay.
    Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
-                 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+                 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -4286,6 +4286,14 @@ adjust_window_trailing_edge (window, delta, horiz_flag)
         {
           if (!NILP (XWINDOW (window)->next))
             {
+              /* This may happen for the minibuffer.  In that case
+                 the window_deletion_count check below does not work.  */
+              if (XINT (CURSIZE (p->next)) - delta <= 0) 
+                {
+                  Fset_window_configuration (old_config);
+                  error ("Cannot adjust window size as specified");
+                }
+
               XSETINT (CURBEG (p->next),
                        XINT (CURBEG (p->next)) + delta);
               size_window (p->next, XINT (CURSIZE (p->next)) - delta,