From: Richard M. Stallman <rms@gnu.org>
Date: Mon, 29 Dec 2003 20:00:36 +0000 (+0000)
Subject: (ange-ftp-start-process): Copy the environment.
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(ange-ftp-start-process): Copy the environment.
---

diff --git a/lisp/net/ange-ftp.el b/lisp/net/ange-ftp.el
index dc3b5a62da9..0277bd0aabc 100644
--- a/lisp/net/ange-ftp.el
+++ b/lisp/net/ange-ftp.el
@@ -1918,7 +1918,8 @@ on the gateway machine to do the ftp instead."
     ;; but that doesn't work: ftp never responds.
     ;; Can anyone find a fix for that?
     (let ((process-connection-type t)
-	  (process-environment process-environment)
+	  ;; Copy this so we don't alter it permanently.
+	  (process-environment (copy-tree process-environment))
 	  (buffer (get-buffer-create name)))
       (save-excursion
 	(set-buffer buffer)