From: Chong Yidong <cyd@stupidchicken.com>
Date: Fri, 30 Mar 2007 02:04:27 +0000 (+0000)
Subject: (Fprimitive_undo): Give clearer error message when trying to change
X-Git-Tag: emacs-pretest-22.0.97~121
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=9e5686841337166bd5bf7b644293f0a0cf616f7c;p=emacs.git

(Fprimitive_undo): Give clearer error message when trying to change
text properties outside accessible part of buffer.
---

diff --git a/src/undo.c b/src/undo.c
index 0eca97df566..7a6ba37d0f8 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -548,6 +548,8 @@ Return what remains of the list.  */)
 		  beg = Fcar (cdr);
 		  end = Fcdr (cdr);
 
+		  if (XINT (beg) < BEGV || XINT (end) > ZV)
+		    error ("Changes to be undone are outside visible portion of buffer");
 		  Fput_text_property (beg, end, prop, val, Qnil);
 		}
 	      else if (INTEGERP (car) && INTEGERP (cdr))