Subject: bug#43677: closed (Re: bug#43677: 27.1; Calc holidays off-by-one error, incorrect business day calculation)

From: [email-masked] (GNU bug Tracking System)
Date: Fri, 02 Oct 2020 10:01:02 +0000

Your bug report

#43677: 27.1; Calc holidays off-by-one error, incorrect business day calculation

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
43677: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=43677
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#43677: 27.1; Calc holidays off-by-one error, incorrect business day calculation
From: Mattias Engdegård <[email-masked]>
To: Aaron Zeng <[email-masked]>
Cc: Lars Ingebrigtsen <[email-masked]>, [email-masked]
Date: Fri, 2 Oct 2020 12:00:52 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

2 okt. 2020 kl. 00.47 skrev Aaron Zeng <[email-masked]>:
> 
> Mattias, that patch seems to work well for me (I tested this by just
> loading the lisp into an older version of emacs, since I don't have
> experience compiling emacs from source).  I don't need business days
> for BC dates.

Excellent, patch pushed to master and bug closed.

Nevermind those BC dates -- it doesn't make much sense to compute business days for proleptic Gregorian dates anyway, even more so considering that the very concept of business days shift wildly throughout history. It's just something that would be fun to have.

Subject: 27.1; Calc holidays off-by-one error, incorrect business day calculation
From: Aaron Zeng <[email-masked]>
To: [email-masked]
Date: Sun, 27 Sep 2020 21:18:50 -0400
List-Id: <debbugs-submit.debbugs.gnu.org>

Hello,

I observe the following incorrect behavior starting from `emacs -Q`:

1. M-x calc
2. ' <2020-11-01> RET --- displays "<Sun Nov 1, 2020>"
3. 1 t - --- should have subtracted one business day, but it displays
"<Sat Oct 31, 2020>" instead of "<Fri Oct 30, 2020>"

Adding a business day to Saturday gives Tuesday instead of Monday.  It
seems like this is would be an off-by-one error.  This appears to be
confirmed by setting the Holidays vector in calc (`s e Holidays`) to
be `[fri, sat]` and trying the above procedure again.

After applying the workaround, instead of seeing Saturday and Tuesday
as the previous and next business days, respectively, I see Friday and
Monday as I would expect.

In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.21,
cairo version 1.16.0)
Windowing system distributor 'Colin Harrison', version 11.0.60900031
System Description: NixOS 20.03 (Markhor)

Recent messages:
When done with a buffer, type , c
Type , c to finish, , k to cancel, and M-p and M-n to recover older messages
Auto-saving...done
Saving file /home/aaron/todo/.git/COMMIT_EDITMSG...
Wrote /home/aaron/todo/.git/COMMIT_EDITMSG
Git finished
Running git push -v origin refs/heads/master:refs/heads/master
Git finished
line-move-visual: End of buffer [10 times]
Quit [3 times]
Quit
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Features:
(shadow cl-print debug calc-map calc-stat hippie-exp emacsbug sendmail
pulse calc-store calc-undo calc-vec calc-prog ox-texinfo ox-org ox-md
ox-latex ox-icalendar ox-html table ox-ascii ox-publish ox calc-forms
evil-iedit-state mail-extr skeleton shell-pop company-web-html
company-web company-css web-completion-data emmet-mode
smartparens-html web-mode dune link-hint nix-mode nix-repl nix-shell
nix-store nix-instantiate nix-shebang nix-format nix sort
magit-bookmark bookmark org-projectile org-category-capture
org-capture calc-arith calccomp calc-misc font-utils magit-extras
make-mode dired-x eieio-opt evil-matchit-ocaml evil-matchit-simple
evil-matchit evil-matchit-sdk counsel-projectile term/rxvt term/xterm
xterm cua-base calc-aent calc-yank calc-alg calc-menu tabify cal-move
ledger-mode ledger-check ledger-texi ledger-test ledger-sort
ledger-report ledger-reconcile ledger-occur ledger-fonts
ledger-fontify ledger-state ledger-complete ledger-schedule
ledger-init ledger-xact ledger-post ledger-exec ledger-navigate
ledger-context ledger-commodities ledger-regex misearch multi-isearch
calc-embed calc-ext calc calc-loaddefs calc-macs mule-util diary-lib
diary-loaddefs cal-iso scheme org-eldoc bcc32-org evil-org ob-C
smartparens-c cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles
cc-align cc-engine cc-vars cc-defs ob-js ob-perl ob-python
smartparens-python python tramp-sh ob-sql ob-shell org-download
org-attach org-id org-superstar toc-org org-indent image-file
org-element avl-tree ol-man org-checklist ol-eshell eshell-z em-dirs
esh-var em-term term ehelp em-smart esh-mode eshell esh-cmd esh-ext
esh-opt esh-proc esh-io esh-arg esh-module esh-groups esh-util
org-tempo tempo ol-info org-habit ol-docview doc-view image-mode exif
ol-bibtex bibtex org-agenda org-refile smartparens-org org-clock orgit
org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-footnote
org-src ob-comint org-pcomplete org-list org-faces org-entities
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org-loaddefs cal-menu calendar cal-loaddefs ol org-compat org-macs
evil-surround company-shell flycheck-bashate sh-script executable ffap
tramp tramp-loaddefs trampver tramp-integration files-x tramp-compat
parse-time iso8601 ls-lisp jka-compr info+ pp company-capf overseer
pkg-info url-http url url-proxy url-privacy url-expand url-methods
url-history mailcap url-auth url-cookie url-domsuf url-util url-gw nsm
epl auto-compile packed elisp-slime-nav flycheck-elsa flycheck-package
package-lint finder eval-sexp-fu helpful trace edebug backtrace
info-look dash-functional elisp-refs smex magit-gitflow face-remap
evil-magit git-rebase magit-submodule magit-obsolete magit-popup
magit-blame magit-stash magit-reflog magit-bisect magit-push
magit-pull magit-fetch magit-clone magit-remote magit-commit
magit-sequence magit-notes magit-worktree magit-tag magit-merge
magit-branch magit-reset magit-files magit-refs magit-status magit
magit-repos magit-apply magit-wip magit-log which-func magit-diff
smerge-mode magit-core magit-autorevert magit-margin magit-transient
magit-process magit-mode git-commit transient magit-git magit-section
magit-utils log-edit message rmc puny rfc822 mml mml-sec epa gnus-util
rmail rmail-loaddefs text-property-search time-date mailabbrev
mail-utils gmm-utils mailheader pcvs-util add-log with-editor
async-bytecomp ocamlformat whitespace vc-git diff-mode company-files
company-keywords company-etags etags fileloop generator company-gtags
company-dabbrev-code company-dabbrev company-semantic company-template
merlin-company company merlin-eldoc merlin-imenu flycheck-ocaml
merlin-cap merlin crm ocp-indent utop utop-minor-mode goto-addr
bug-reference auto-highlight-symbol evil-lisp-state flycheck-pos-tip
pos-tip flycheck-ledger flycheck find-func highlight-numbers
parent-mode highlight-parentheses hideshow rainbow-delimiters
smartparens-config smartparens-ml smartparens-text smartparens
yasnippet-snippets yasnippet tuareg speedbar sb-image ezimage dframe
tuareg-opam flymake-proc flymake smie caml-help caml-types caml-emacs
find-file editorconfig-core editorconfig-core-handle
editorconfig-fnmatch zoom-frm frame-cmds frame-fns avoid
vi-tilde-fringe diminish evil-escape display-line-numbers disp-table
projectile grep recentf tree-widget mode-line-bell indent-guide
column-enforce-mode fancy-battery battery dired-async async dired-aux
winner server xterm-color spacemacs-whitespace-cleanup ws-butler winum
spacemacs-purpose-popwin window-purpose-x imenu-list imenu ibuf-ext
ibuffer ibuffer-loaddefs unicode-fonts symbol-overlay
string-inflection spaceline-config spaceline-segments spaceline
powerline powerline-separators powerline-themes saveplace savehist
popwin persp-mode org-rich-yank merlin-iedit iedit iedit-lib
multiple-cursors-core ligature ivy-rich ivy-hydra ivy-avy avy hl-todo
fasd window-purpose window-purpose-fixes
window-purpose-prefix-overload window-purpose-switch let-alist
window-purpose-layout window-purpose-core window-purpose-configuration
window-purpose-utils eyebrowse evil-unimpaired f evil-textobj-line
evil-anzu anzu emr popup s editorconfig noutline outline counsel xdg
xref project dired dired-loaddefs compile swiper ivy flx delsel
ivy-faces ivy-overlay colir color clean-aindent-mode clang-format xml
cl hybrid-mode evil-evilified-state which-key use-package
use-package-ensure use-package-delight use-package-diminish
use-package-bind-key bind-key use-package-core hydra lv cus-edit evil
evil-keybindings evil-integration undo-tree diff evil-maps
evil-commands reveal flyspell ispell evil-jumps evil-command-window
evil-types evil-search evil-ex shell pcomplete comint ansi-color
evil-macros evil-repeat evil-states evil-core evil-common windmove
thingatpt rect evil-digraphs evil-vars ring bind-map quelpa mm-decode
mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util
ietf-drums mail-prsvr lisp-mnt help-fns radix-tree hl-line xt-mouse
autorevert filenotify cl-extra wid-edit base16-material-theme
base16-theme format-spec info finder-inf mb-depth midnight time
cus-start cus-load ido-vertical-mode ido core-spacemacs core-spacebind
core-use-package-ext core-transient-state core-micro-state core-toggle
core-keybindings core-fonts-support core-themes-support
core-display-init core-jump core-release-management
core-custom-settings core-configuration-layer eieio-compat
core-progress-bar core-spacemacs-buffer core-funcs ht dash help-mode
warnings package browse-url url-handlers url-parse auth-source cl-seq
password-cache json map url-vars eieio eieio-core eieio-loaddefs epg
epg-config core-command-line pcase core-debug edmacro kmacro derived
cl-macs profiler easymenu cl-loaddefs cl-lib core-hooks
page-break-lines easy-mmode core-env load-env-vars rx
core-dotspacemacs advice core-emacs-backports core-dumper subr-x seq
byte-opt gv bytecomp byte-compile cconv tooltip eldoc electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese
eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic
indian cyrillic chinese composite charscript charprop case-table
epa-hook jka-cmpr-hook help simple abbrev obarray 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 threads dbusbind inotify
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 2463178 2188195)
 (symbols 48 263811 35)
 (strings 32 617131 174299)
 (string-bytes 1 26918019)
 (vectors 16 132846)
 (vector-slots 8 2935185 1278064)
 (floats 8 1621 9719)
 (intervals 56 146727 145044)
 (buffers 1000 550))