GNU bug report logs - #18176
24.4.50; Errors on dates far in the future in url.el

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.4.50; Errors on dates far in the future in url.el
Date: Sun, 03 Aug 2014 01:18:48 +0200

Debugger entered--Lisp error: (error "Invalid date: 31-Dec-9999 23:59:59.00 GMT")
  signal(error ("Invalid date: 31-Dec-9999 23:59:59.00 GMT"))
  error("Invalid date: %s" "31-Dec-9999 23:59:59.00 GMT")
  (condition-case nil (apply (quote encode-time) (parse-time-string (timezone-make-date-arpa-standard date))) (error (error "Invalid date: %s" date)))
  (condition-case nil (apply (quote encode-time) (parse-time-string date)) (error (condition-case nil (apply (quote encode-time) (parse-time-string (timezone-make-date-arpa-standard date))) (error (error "Invalid date: %s" date)))))
  date-to-time("31-Dec-9999 23:59:59.00 GMT")
  url-cookie-expired-p([url-cookie "CheezySplits" "SplitTestingPID=dba40051-b06e-49f7-ad9f-5e53725c60e6" "31-Dec-9999 23:59:59.00 GMT" "/" ".cheezburger.com" nil])
  url-cookie-retrieve("cheezburger.com" "/8273908992?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+ICanHasCheezburger+%28I+CAN+HAS+CHEEZBURGER%29" nil)
  url-cookie-generate-header-lines("cheezburger.com" "/8273908992?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+ICanHasCheezburger+%28I+CAN+HAS+CHEEZBURGER%29" nil)
  url-http-create-request()
  byte-code("\301\302 \"\207" [proc process-send-string url-http-create-request] 3)
  url-http-async-sentinel(#<process cheezburger.com<4>> "open\n")

The url-cookie function should either ignore invalid dates, or
date-to-time should understand dates after 2037.  Or both.  Which would
be best.



In GNU Emacs 24.4.50.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw scroll bars)
 of 2014-06-09 on stories
Repository revision: 117291 rgm <at> gnu.org-20140608234143-lxs3ijcc3exkcomq
Windowing system distributor `Fedora Project', version 11.0.11404000
System Description:	Debian GNU/Linux 7.0 (wheezy)

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GSETTINGS NOTIFY GNUTLS
LIBXML2 FREETYPE LIBOTF XFT ZLIB

Important settings:
  value of $LANG: en_US
  locale-coding-system: iso-latin-1-unix

Major mode: Article

Minor modes in effect:
  shell-dirtrack-mode: t
  tooltip-mode: t
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  file-name-shadow-mode: t
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  buffer-read-only: t
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Recent input:
u u <down-mouse-1> <mouse-movement> <mouse-1> <help-echo> 
q s <down-mouse-1> <mouse-1> g <up> <up> <up> <up> 
<up> s <down-mouse-1> <mouse-1> g <next> <up> <down> 
<down> <down> <down> <down> <down> <down> <down> <up> 
<return> <return> h h h q <return> <return> q l <return> 
<return> SPC q l s <down> <return> <return> h h q <return> 
<return> n n q l s . s <down-mouse-1> <mouse-1> g <down-mouse-1> 
<mouse-1> g g g g g <down-mouse-1> <mouse-1> g <down-mouse-1> 
<mouse-1> g <down-mouse-1> <mouse-movement> <mouse-1> 
g <down-mouse-1> <mouse-1> g s <down-mouse-1> <mouse-1> 
g <down-mouse-1> <mouse-1> g <down-mouse-1> <mouse-movement> 
<mouse-1> g <down-mouse-1> <mouse-1> g <down-mouse-1> 
<mouse-1> g <down-mouse-1> <mouse-1> g . <return> d 
q <next> <down> <down> <down> <down> <down> <down> 
<down> <down> <up> <return> <return> q <up> <up> <return> 
<return> h M-> <up> <up> <up> u u <down-mouse-1> <mouse-1> 
<up> <up> <up> w w M-: 9 s t <backspace> <backspace> 
<backspace> ( s e t q SPC d e b u g - o n - e r r o 
r SPC t ) <return> w q C-x C-f C-a C-k ~ / m g <tab> 
l i <tab> <return> M-x g r e p <return> c o o k i e 
SPC * . e l <return> C-x o <down> <down> <down> <down> 
C-e <left> C-x C-e q <next> <prior> q H-o H-o C-x b 
<return> w <down-mouse-1> <mouse-movement> <mouse-1> 
h u SPC SPC n q SPC q SPC q n n n SPC h M-> <up> <up> 
<up> u q <down-mouse-1> <mouse-movement> <mouse-1> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <down> <down> <return> <return> h h h M-> <up> 
<up> <up> <return> <down> <down> <down> <down> <down> 
C-a C-SPC <down> <down> M-w M-< M-> M-w q M-x r e p 
o <tab> r <tab> b <tab> <return>

Recent messages:
Mark set
Copied http://liartownusa.tumblr.com/post/93615083800
No more unseen articles
No more unread articles
Mark set
Contacting host: feedproxy.google.com:80
Entering debugger...
Mark set [3 times]
Back to top level.
Making completion list...

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/home/larsi/mgnus/lisp/flow-fill hides /home/larsi/src/emacs/trunk/lisp/gnus/flow-fill
/home/larsi/mgnus/lisp/mm-view hides /home/larsi/src/emacs/trunk/lisp/gnus/mm-view
/home/larsi/mgnus/lisp/gnus-html hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-html
/home/larsi/mgnus/lisp/gnus-uu hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-uu
/home/larsi/mgnus/lisp/deuglify hides /home/larsi/src/emacs/trunk/lisp/gnus/deuglify
/home/larsi/mgnus/lisp/spam-stat hides /home/larsi/src/emacs/trunk/lisp/gnus/spam-stat
/home/larsi/mgnus/lisp/nndir hides /home/larsi/src/emacs/trunk/lisp/gnus/nndir
/home/larsi/mgnus/lisp/gnus-kill hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-kill
/home/larsi/mgnus/lisp/gnus-ems hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-ems
/home/larsi/mgnus/lisp/gnus-group hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-group
/home/larsi/mgnus/lisp/nnagent hides /home/larsi/src/emacs/trunk/lisp/gnus/nnagent
/home/larsi/mgnus/lisp/sieve-mode hides /home/larsi/src/emacs/trunk/lisp/gnus/sieve-mode
/home/larsi/mgnus/lisp/rfc2047 hides /home/larsi/src/emacs/trunk/lisp/gnus/rfc2047
/home/larsi/mgnus/lisp/gmm-utils hides /home/larsi/src/emacs/trunk/lisp/gnus/gmm-utils
/home/larsi/mgnus/lisp/utf7 hides /home/larsi/src/emacs/trunk/lisp/gnus/utf7
/home/larsi/mgnus/lisp/nnimap hides /home/larsi/src/emacs/trunk/lisp/gnus/nnimap
/home/larsi/mgnus/lisp/mm-decode hides /home/larsi/src/emacs/trunk/lisp/gnus/mm-decode
/home/larsi/mgnus/lisp/time-date hides /home/larsi/src/emacs/trunk/lisp/calendar/time-date
/home/larsi/mgnus/lisp/parse-time hides /home/larsi/src/emacs/trunk/lisp/calendar/parse-time

Features:
(shadow hashcash ecomplete emacsbug sendmail shell grep compile
help-mode lyric-wiki dom discogs json dae musicbrainz scan scrobble
tellstick wave cddb captitle expect org-element org-rmail org-mhe
org-irc org-info org-gnus org-docview org-bibtex bibtex org-bbdb org-w3m
org advice org-macro org-footnote org-pcomplete pcomplete org-list
org-faces org-entities noutline outline org-version ob-emacs-lisp ob
ob-tangle org-src ob-ref ob-lob ob-table ob-keys ob-exp ob-comint comint
ring ob-core ob-eval org-compat org-macs org-loaddefs find-func cal-menu
calendar cal-loaddefs image-file flow-fill movie pvr pp eww misearch
multi-isearch shr-color color gnus-html mule-util gnus-picon sort
gnus-cite smiley ansi-color url-queue url-cache shr mm-archive copyright
vc-cvs gnus-async gnus-dup qp gnus-ml gmane spam-gmane dns mm-url
disp-table gnus-fun gnus-mdrtn gnus-topic pop3 nndoc nnmbox nndraft
utf-7 nnmh nnml nnfolder gnutls network-stream starttls nnir spam-report
spam spam-stat gnus-uu yenc gnus-agent gnus-srvr gnus-score score-mode
nnvirtual gnus-msg gnus-art mm-uu mml2015 epg-config mm-view mml-smime
smime dig nntp gnus-cache gnus-sum gnus-group gnus-undo gnus-start
gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo parse-time
gnus-spec gnus-int gnus-range message format-spec rfc822 mml mml-sec
mailabbrev gmm-utils mailheader gnus-win gnus-load gnus gnus-ems
gnus-compat nnheader mail-utils debug debbugs-gnu easy-mmode derived
debbugs soap-client mm-decode mm-bodies mm-encode url-http tls url-auth
mail-parse rfc2231 rfc2047 rfc2045 ietf-drums url-gw url url-proxy
url-privacy url-expand url-methods url-history url-cookie url-domsuf
url-util url-parse auth-source eieio byte-opt bytecomp byte-compile
cconv eieio-core gnus-util mm-util help-fns mail-prsvr password-cache
url-vars mailcap warnings xml ido flyspell ispell benchmark w3m
browse-url doc-view dired image-mode easymenu timezone w3m-hist w3m-fb
w3m-ems wid-edit w3m-ccl ccl w3m-favicon w3m-image w3m-proc w3m-util
cl-macs add-log mail-extr jka-compr cl gv cl-loaddefs cl-lib time-date
tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
x-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list
newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai
tai-viet lao korean japanese hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer 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 make-network-process
gfilenotify dynamic-setting system-font-setting font-render-setting
x-toolkit x multi-tty emacs)

Memory information:
((conses 16 865405 110805)
 (symbols 48 170251 0)
 (miscs 40 877 2084)
 (strings 32 248488 6983)
 (string-bytes 1 12344846)
 (vectors 16 37299)
 (vector-slots 8 1024217 34098)
 (floats 8 6836 671)
 (intervals 56 219574 1611)
 (buffers 960 169)
 (heap 1024 184366 80019))

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #8 received at 18176 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: 18176 <at> debbugs.gnu.org
Subject: Re: bug#18176: 24.4.50; Errors on dates far in the future in url.el
Date: Sat, 02 Aug 2014 22:22:09 -0400

Lars Magne Ingebrigtsen wrote:

>   date-to-time("31-Dec-9999 23:59:59.00 GMT")
[...]
> date-to-time should understand dates after 2037. 

I think it's actually 4038, due to this element of parse-time-rules:

((5) (100 4038))

Simply change that to

((5) (100 9999))

and it seems to work; but I did not check if that breaks anything else.

Message #11 received at 18176 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: 18176 <at> debbugs.gnu.org
Subject: Re: bug#18176: 24.4.50; Errors on dates far in the future in url.el
Date: Sat, 02 Aug 2014 23:31:50 -0400

Lars Magne Ingebrigtsen wrote:

> The url-cookie function should either ignore invalid dates,

What do you want url-cookie-expired-p to return when a cookie has an
expiry date that it cannot parse? t or nil?

Message #16 received at 18176-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 18176-done <at> debbugs.gnu.org
Subject: Re:  24.4.50; Errors on dates far in the future in url.el
Date: Sun, 03 Aug 2014 08:50:35 -0700

That "4038" started out as a "2038" (the year 32-bit signed time_t's 
will roll around) and then someone added 2000 seemingly at random.  We 
might as well bump it to most-positive-fixnum.

However, this won't work on hosts with 32-bit time_t, because the 
low-level primitives can't go past 2038.  (Even on 64-bit hosts it won't 
work for time stamps in the very far future.)  So url-cookie-expired-p 
needs to take greater care here.

Fixing this uncovered a couple of other problems.  First, date-to-time 
shouldn't fall back on timezone-make-date-arpa-standard if encode-time 
says the date is out of range.  Second, the low-level primitives don't 
consistently call time_overflow when there's a time overflow.

This particular use case suggests that url-cookie-expired-p should treat 
out-of-range expiration dates as being infinite.

I installed a patch to do all the above, as trunk bzr 117637.  I suppose 
we could get fancier by distinguishing negative from positive time 
overflow, and/or by creating error symbols for time overflow flavors, 
but this patch should be enough to fix the current bug.

Message #19 received at 18176 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: 18176 <at> debbugs.gnu.org
Subject: Re: bug#18176: closed (Re:  24.4.50;
 Errors on dates far in the future in url.el)
Date: Sun, 03 Aug 2014 17:58:13 +0200

help-debbugs <at> gnu.org (GNU bug Tracking System) writes:

> This particular use case suggests that url-cookie-expired-p should
> treat out-of-range expiration dates as being infinite.

Yeah, that seems like the right solution.  If we can't parse the
expiration date, we should treat it as if the expiration date isn't
present, and that's the effect we get here, if I understand the code
correctly.  (Which I may not do; I just skimmed it very quickly.)

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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