Bug: org-cycle stops working on Org files with empty lines at end of buffer [9.4 (9.4-elpaplus @ /home/brentg/.emacs.d/elpa/org-plus-contrib-20200914/)]

[B Goodr <bgoodr@gmail.com>]

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Hi,

Still loving Org mode!!  Keep up the good work.

Here is a bug, though:

Steps to reproduce:

Store the following into some .org file (in between the "cut-here" lines):

---cut-here---cut-here---cut-here---cut-here---cut-here---cut-here---
* TODO aaa bbb ccc

** TODO aaa bbb ccc

delete-this-line-to-see-the-problem
---cut-here---cut-here---cut-here---cut-here---cut-here---cut-here---

Move point at first asterisk (beginning of buffer).

Type TAB key (bound to org-cycle) multiple times and notice it cycles
the headings through the various levels of exposure.

Now go to the end of the buffer, and delete the one line there
containing "delete-this-line-to-see-the-problem", but retain the two
empty lines at the end.

Repeat the above steps with the TAB key at the top of the buffer, and
notice it stops working.

On the mailing list, I see some recent changes that might or might not
have broken this. I've not upgraded Org mode in a while:

https://lists.gnu.org/archive/html/emacs-orgmode/2020-09/msg00520.html

Thanks!
-bgoodr



Emacs  : GNU Emacs 26.3 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.14)
 of 2020-03-26, modified by Debian
Package: Org mode version 9.4 (9.4-elpaplus @
/home/brentg/.emacs.d/elpa/org-plus-contrib-20200914/)

current state:
==============
(setq
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
org-src-mode-configure-edit-buffer)
 org-link-shell-confirm-function 'yes-or-no-p
 org-babel-after-execute-hook '(bg-org-babel-after-execute-hook)
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-export-with-sub-superscripts nil
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-refile-targets '((nil :maxlevel . 9) (org-agenda-files :maxlevel . 9))
 org-html-format-inlinetask-function
'org-html-format-inlinetask-default-function
 org-odt-format-headline-function 'org-odt-format-headline-default-function
 org-agenda-files "/home/brentg/Plans/Home/org-agenda-files-list-file.txt"
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-plantuml-jar-path "/home/brentg/plantuml/plantuml.jar"
 org-startup-folded nil
 org-id-link-to-org-use-id t
 org-mode-hook '(org-tempo-setup org-clock-load bg-org-mode-hook #[0
"\301\211 \207" [imenu-create-index-function org-imenu-get-tree] 2]
#[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook
org-show-all append local] 5]
#[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook
org-babel-show-result-all append local] 5] org-babel-result-hide-spec
org-babel-hide-all-hashes org-eldoc-load)
 org-clock-persist t
 org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-confirm-elisp-link-function 'bg-org-confirm-elisp-link
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-bibtex-headline-format-function #[257 "\300 \236A\207" [:title] 3
"\n\n(fn ENTRY)"]
 org-adapt-indentation nil
 org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"]
 org-babel-pre-tangle-hook '(save-buffer)
 org-file-apps '((auto-mode . emacs) (directory . emacs) ("\\.mm\\'" .
default) ("\\.x?html?\\'" lambda (file link) (browse-url-of-file
(expand-file-name file))) ("\\.pdf\\'" . default))
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe
org-babel-header-arg-expand)
 org-babel-load-languages '((emacs-lisp . t) (python . t) (shell . t)
(sqlite . t) (dot . t) (plantuml . t))
 org-ascii-format-drawer-function #[771 " \207" [] 4 "\n\n(fn NAME CONTENTS
WIDTH)"]
 org-agenda-loop-over-headlines-in-active-region nil
 org-src-lang-modes '(("arduino" . arduino) ("redis" . redis) ("php" . php)
("C" . c) ("C++" . c++) ("asymptote" . asy) ("bash" . sh) ("beamer" .
latex) ("calc" . fundamental) ("cpp" . c++) ("ditaa" . artist)
     ("dot" . fundamental) ("elisp" . emacs-lisp) ("ocaml" . tuareg)
("screen" . shell-script) ("shell" . sh) ("sqlite" . sql))
 org-occur-hook '(org-first-headline-recenter)
 org-html-head-include-default-style nil
 org-html-htmlize-output-type 'css
 org-export-headline-levels 100
 org-edit-src-auto-save-idle-delay 5
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
org-cycle-show-empty-lines org-optimize-window-after-visibility-change)
 org-todo-keywords '((sequence "TODO(t)" "|" "DONE(d)" "SHELVED(s)"
"DELEGATED(e)"))
 org-speed-command-hook '(org-speed-command-activate
org-babel-speed-command-activate)
 org-clock-persist-file "/home/brentg/Plans/Home/org-clock-save.el"
 org-odt-format-inlinetask-function
'org-odt-format-inlinetask-default-function
 org-babel-tangle-lang-exts '(("python" . "py") ("emacs-lisp" . "el")
("elisp" . "el"))
 org-return-follows-link t
 org-refile-use-outline-path 'file
 org-clock-in-hook '(bg-org-clock-in-hook)
 org-export-before-parsing-hook '(org-attach-expand-links)
 org-id-locations-file "/home/brentg/Plans/Home/.org-id-locations"
 org-confirm-shell-link-function 'yes-or-no-p
 org-link-parameters '(("attachment" :follow org-attach-follow :complete
org-attach-complete-link) ("id" :follow org-id-open) ("eww" :follow
org-eww-open :store org-eww-store-link)
      ("rmail" :follow org-rmail-open :store org-rmail-store-link) ("mhe"
:follow org-mhe-open :store org-mhe-store-link)
      ("irc" :follow org-irc-visit :store org-irc-store-link :export
org-irc-export) ("info" :follow org-info-open :export org-info-export
:store org-info-store-link)
      ("gnus" :follow org-gnus-open :store org-gnus-store-link) ("docview"
:follow org-docview-open :export org-docview-export :store
org-docview-store-link)
      ("bibtex" :follow org-bibtex-open :store org-bibtex-store-link)
("bbdb" :follow org-bbdb-open :export org-bbdb-export :complete
org-bbdb-complete-link :store org-bbdb-store-link)
      ("w3m" :store org-w3m-store-link) ("file+sys") ("file+emacs")
("shell" :follow org-link--open-shell)
      ("news" :follow #[514 "\301\300\302 Q \"\207" ["news" browse-url ":"]
6 "\n\n(fn URL ARG)"])
      ("mailto" :follow #[514 "\301\300\302 Q \"\207" ["mailto" browse-url
":"] 6 "\n\n(fn URL ARG)"])
      ("https" :follow #[514 "\301\300\302 Q \"\207" ["https" browse-url
":"] 6 "\n\n(fn URL ARG)"])
      ("http" :follow #[514 "\301\300\302 Q \"\207" ["http" browse-url ":"]
6 "\n\n(fn URL ARG)"])
      ("ftp" :follow #[514 "\301\300\302 Q \"\207" ["ftp" browse-url ":"] 6
"\n\n(fn URL ARG)"]) ("help" :follow org-link--open-help) ("file" :complete
org-link-complete-file)
      ("elisp" :follow org-link--open-elisp) ("doi" :follow
org-link--open-doi))
 org-latex-format-headline-function
'org-latex-format-headline-default-function
 org-link-elisp-confirm-function 'bg-org-confirm-elisp-link
 org-clock-idle-time 10
 org-latex-format-inlinetask-function
'org-latex-format-inlinetask-default-function
 org-tab-before-tab-emulation-hook '(org-tempo-complete-tag)
 org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-html-format-headline-function
'org-html-format-headline-default-function
 org-confirm-babel-evaluate 'bg-org-confirm-babel-evaluate
 org-directory "/home/brentg/Plans/Home"
 org-publish-project-alist '(("my-emacs-lisp-org" :base-directory
"~/emacs_lisp/" :publishing-directory "~/public_html/emacs_lisp" :recursive
t :table-of-contents t :base-extension "org" :publishing-function
     org-html-publish-to-html :style-include-default nil :section-numbers t
:with-sub-superscript nil :html-head "<link rel=\"stylesheet\"
href=\"org.css\" type=\"text/css\" />"
     :author-info nil :creator-info nil)
    ("my-emacs-lisp-extra" :base-directory "~/emacs_lisp/"
:publishing-directory "~/public_html/emacs_lisp" :base-extension
"css\\|pdf\\|png\\|jpg\\|gif" :publishing-function
     org-publish-attachment :recursive t :author nil)
    ("my-emacs-lisp" :components ("my-emacs-lisp-org"
"my-emacs-lisp-extra")))
 org-default-notes-file "/home/brentg/Plans/Home/notes.org"
 )

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