Re: [cmucl-commit] CMUCL commit: src/code (package.lisp)

  |From: Raymond Toy <[email protected]>
  |Date: Sun, 26 Dec 2010 09:03:48 -0500
  |MIME-Version: 1.0
  |Content-Type: text/plain; charset="us-ascii"
  |
  |    Date: Sunday, December 26, 2010 @ 09:03:48
  |  Author: rtoy
  |    Path: /project/cmucl/cvsroot/src/code
  |
  |Modified: package.lisp
  |
  |Unintern removes the wrong symbol.  See
  |https://bugs.launchpad.net/sbcl/+bug/693796.

[It would be nice to have the whole relevant description in the
 repository, as part of the commit, instead of citing some website
 which may or may not be offline]

I believe this patch would break the following use case which used to
work earlier

$ cat test.l
(in-package "CL-USER")
(eval-when (load eval compile)
  (when (find-package "FOO-PACKAGE") (delete-package "FOO-PACKAGE"))
  (when (find-package "BAR-PACKAGE") (delete-package "BAR-PACKAGE")))
(defpackage "FOO-PACKAGE" (:export "BAR-SYMBOL"))
(defpackage "BAR-PACKAGE")
(eval-when (load eval compile)
  (unintern 'foo-package:bar-symbol "FOO-PACKAGE"))

(assert (not (find-symbol "BAR-SYMBOL" "FOO-PACKAGE")))

* (load (compile-file "test.l"))


  |Index: src/code/package.lisp
  |diff -u src/code/package.lisp:1.80 src/code/package.lisp:1.81
  |--- src/code/package.lisp:1.80	Tue Apr 20 13:57:45 2010
  |+++ src/code/package.lisp	Sun Dec 26 09:03:48 2010
  |@@ -1444,8 +1444,8 @@
  | 	    (remove symbol shadowing-symbols)))
  | 
  |     (multiple-value-bind (s w) (find-symbol name package)
  |-      (declare (ignore s))
  |-      (cond ((or (eq w :internal) (eq w :external))
  |+      (cond ((not (eq symbol s)) nil)
  |+	    ((or (eq w :internal) (eq w :external))
  | 	     (nuke-symbol (if (eq w :internal)
  | 			      (package-internal-symbols package)
  | 			      (package-external-symbols package))
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