From bbfe7ee8bc00a8744fe44027634ad26cda2b8596 Mon Sep 17 00:00:00 2001
From: wlott <wlott>
Date: Mon, 18 May 1992 19:20:51 +0000
Subject: [PATCH] Check against the difference between the new and the old use
 lists being NIL before warning in %defpackage.

---
 code/package.lisp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/code/package.lisp b/code/package.lisp
index f03fdfa32..19794bac3 100644
--- a/code/package.lisp
+++ b/code/package.lisp
@@ -7,7 +7,7 @@
 ;;; Scott Fahlman or slisp-group@cs.cmu.edu.
 ;;;
 (ext:file-comment
-  "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/code/package.lisp,v 1.24 1992/05/18 17:27:54 wlott Exp $")
+  "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/code/package.lisp,v 1.25 1992/05/18 19:20:51 wlott Exp $")
 ;;;
 ;;; **********************************************************************
 ;;;
@@ -688,8 +688,9 @@
 	    (new-use-list (mapcar #'package-or-lose use)))
 	(use-package (set-difference new-use-list old-use-list) package)
 	(let ((laterize (set-difference old-use-list new-use-list)))
-	  (unuse-package laterize package)
-	  (warn "~A used to use the following packages:~%  ~S" laterize))))
+	  (when laterize
+	    (unuse-package laterize package)
+	    (warn "~A used to use the following packages:~%  ~S" laterize)))))
     ;; Import and Intern.
     (dolist (sym-name interns)
       (intern sym-name package))
-- 
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