From c64cc467751e1de930d75759087a5f6955ddecf4 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Wed, 12 May 1993 20:32:32 +0000
Subject: [PATCH] (comint-filter): Increment opoint only if after insertion
 point.

---
 lisp/comint.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/comint.el b/lisp/comint.el
index 5c0d27ccb89..0d49cba5590 100644
--- a/lisp/comint.el
+++ b/lisp/comint.el
@@ -662,7 +662,8 @@ Similarly for Soar, Scheme, etc."
 	  (nchars (length string)))
       (widen)
       (goto-char (process-mark process))
-      (setq opoint (+ opoint nchars))
+      (if (<= (point) opoint)
+	  (setq opoint (+ opoint nchars)))
       ;; Insert after old_begv, but before old_zv.
       (if (< (point) obeg)
 	  (setq obeg (+ obeg nchars)))