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[debbugs-tracker] bug#24876: closed (26.0.50; alist copied by copy-tree

From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#24876: closed (26.0.50; alist copied by copy-tree shares structure with original)
Date: Sat, 05 Nov 2016 15:39:02 +0000

Your message dated Sat, 05 Nov 2016 16:38:04 +0100
with message-id <address@hidden>
and subject line Re: bug#24876: 26.0.50; alist copied by copy-tree shares 
structure with original
has caused the debbugs.gnu.org bug report #24876,
regarding 26.0.50; alist copied by copy-tree shares structure with original
to be marked as done.

(If you believe you have received this mail in error, please contact

24876: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=24876
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: 26.0.50; alist copied by copy-tree shares structure with original Date: Fri, 04 Nov 2016 08:51:36 -0700
copy-tree will recursively copy structures inside of vectors if you pass
it a non-nil vecp argument. But it fails to recursively copy structures
inside of vectors in alists constructed with dotted pairs. To reproduce,
enter the following code into *scratch* and M-x eval-buffer RET:

(defun my-copy-tree-bug ()
  (let* ((vec-ab (vector 'a 'b))
         (vec-abcd (vector vec-ab (vector 'c 'd)))
         (vec-alist (list (list 'key vec-abcd)))
         (vec-alist-copy (copy-tree vec-alist t))
         (vec-dotted-alist (list (cons 'key vec-abcd)))
         (vec-dotted-alist-copy (copy-tree vec-dotted-alist t)))
    (message "Before:")
    (message " Original: %S \tCopy: %S" vec-alist vec-alist-copy)
    (message " Original: %S \tCopy: %S" vec-dotted-alist vec-dotted-alist-copy)

    (aset vec-ab 0 'foo)
    (message "After change to original:")
    (message " Original: %S \tCopy: %S" vec-alist vec-alist-copy)
    (message " Original: %S \tCopy: %S" vec-dotted-alist 


The copy is independent of the original of the alist constructed
with a list but not independent of the original of the alist constructed
with a dotted pair.

In GNU Emacs (x86_64-apple-darwin15.6.0, NS appkit-1404.47 Version 
10.11.6 (Build 15G1004))
 of 2016-11-03 built on rainbow.local
Repository revision: 1a2e210db7d85d8cf5f7205a0e4acc49f2ac6e67
Windowing system distributor 'Apple', version 10.3.1404
Recent messages:
 Original: ((key . [(foo b) (c d)]))    Copy: ((key . [(foo b) (c d)]))
" Original: ((key . [(foo b) (c d)]))   Copy: ((key . [(foo b) (c d)]))"
 Original: ((key [[a b] [c d]]))        Copy: ((key [[a b] [c d]]))
 Original: ((key . [[a b] [c d]]))      Copy: ((key . [[a b] [c d]]))
After change to original:
 Original: ((key [[foo b] [c d]]))      Copy: ((key [[a b] [c d]]))
 Original: ((key . [[foo b] [c d]]))    Copy: ((key . [[foo b] [c d]]))
" Original: ((key . [[foo b] [c d]]))   Copy: ((key . [[foo b] [c d]]))"

Configured using:
 'configure --with-ns --disable-ns-self-contained'

Configured features:

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

Minor modes in effect:
  global-undo-tree-mode: t
  undo-tree-mode: t
  diff-auto-refine-mode: t
  ivy-mode: t
  global-flycheck-mode: t
  flycheck-mode: t
  buffer-face-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  global-company-mode: t
  company-mode: t
  pyvenv-mode: t
  shell-dirtrack-mode: t
  nameless-mode: t
  beacon-mode: t
  rainbow-mode: t
  column-enforce-mode: t
  volatile-highlights-mode: t
  region-state-mode: t
  ws-butler-global-mode: t
  ws-butler-mode: t
  show-smartparens-global-mode: t
  show-smartparens-mode: t
  smartparens-global-mode: t
  smartparens-global-strict-mode: t
  smartparens-strict-mode: t
  smartparens-mode: t
  which-key-mode: t
  modalka-mode: t
  recentf-mode: t
  global-auto-revert-mode: t
  winner-mode: t
  display-time-mode: t
  savehist-mode: t
  override-global-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

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chinese charscript case-table epa-hook jka-cmpr-hook help simple abbrev
obarray minibuffer cl-preloaded nadvice loaddefs button faces cus-face
macroexp files text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget hashtable-print-readable backquote kqueue
cocoa ns multi-tty make-network-process emacs)

Memory information:
((conses 16 755982 118671)
 (symbols 48 47054 1)
 (miscs 40 3486 3707)
 (strings 32 120683 149916)
 (string-bytes 1 3559912)
 (vectors 16 77911)
 (vector-slots 8 1922399 95872)
 (floats 8 1077 1577)
 (intervals 56 28644 4185)
 (buffers 976 37))

--- End Message ---
--- Begin Message --- Subject: Re: bug#24876: 26.0.50; alist copied by copy-tree shares structure with original Date: Sat, 05 Nov 2016 16:38:04 +0100 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)
Fixed in master.

--- End Message ---

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