Bug: org-agenda fails to interpret UTF-8 filenames in some cases

[Lubos Boucek]

Hello,

After adding file "úkoly.org" (filename written with Czech keyboard)
with `C-c [`, immediate `M-x org-agenda t` goes through. However,
after restarting emacs, the same command stops with warning
"Non-existent agenda file c:/Users/lubos/Documents/org/úkoly.org.
[R]emove from list or [A]bort?".

Curiously, another character like 'č' doesn't trigger the warning. And
even more curiously, if the file "úkoly.org" has been added after
adding a file with 'č' in its name, there is no such problem.

Thank you in advance for any investigation. Some diagnostics (before
adding either file) follows:


Windows 7

Emacs  : GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
 of 2019-08-29
Package: Org mode version 9.3.6 (9.3.6-17-g389288-elpa @
c:/Users/lubos/AppData/Roaming/.emacs.d/elpa/org-20200224/)

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-metadown-hook '(org-babel-pop-to-session-maybe)
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-agenda-files '("c:/Users/lubos/Documents/org/odkazy.org"
            "c:/Users/lubos/Documents/org/ukoly.org"
            "c:/Users/lubos/Documents/org/books.org"
            "c:/Users/lubos/Documents/org/tasks.org"
            "c:/Users/lubos/Documents/org/usernames.org")
 org-modules '(org-bbdb org-bibtex org-docview org-gnus org-info org-irc org-mhe
           org-rmail org-w3m org-drill)
 org-mode-hook '(#[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-archive-hook '(org-attach-archive-delete-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 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-babel-pre-tangle-hook '(save-buffer)
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe
              org-babel-header-arg-expand)
 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-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-show-empty-lines
          org-optimize-window-after-visibility-change)
 org-speed-command-hook '(org-speed-command-activate
              org-babel-speed-command-activate)
 org-font-lock-set-keywords-hook '(org-drill-add-cloze-fontification)
 org-confirm-shell-link-function 'yes-or-no-p
 org-link-parameters '(("attachment" :follow org-attach-open-link :export
            org-attach-export-link :complete org-attach-complete-link)
               ("id" :follow org-id-open) ("w3m" :store org-w3m-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)
               ("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)
               ("file+sys") ("file+emacs")
               ("shell" :follow org-link--open-shell)
               ("news" :follow
            #[257 "\301\300\302 Q!\207" ["news" browse-url ":"] 5
              "\n\n(fn URL)"]
            )
               ("mailto" :follow
            #[257 "\301\300\302 Q!\207" ["mailto" browse-url ":"] 5
              "\n\n(fn URL)"]
            )
               ("https" :follow
            #[257 "\301\300\302 Q!\207" ["https" browse-url ":"] 5
              "\n\n(fn URL)"]
            )
               ("http" :follow
            #[257 "\301\300\302 Q!\207" ["http" browse-url ":"] 5
              "\n\n(fn URL)"]
            )
               ("ftp" :follow
            #[257 "\301\300\302 Q!\207" ["ftp" browse-url ":"] 5
              "\n\n(fn URL)"]
            )
               ("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-link-elisp-confirm-function 'yes-or-no-p
 )


~/.emacs
=======
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(ansi-color-faces-vector
   [default default default italic underline success warning error])
 '(current-language-environment "UTF-8")
 '(custom-enabled-themes (quote (tango-dark)))
 '(org-agenda-files
   (quote
    ("c:/Users/lubos/Documents/org/odkazy.org"
"c:/Users/lubos/Documents/org/books.org"
"c:/Users/lubos/Documents/org/tasks.org"
"c:/Users/lubos/Documents/org/usernames.org")))
 '(org-modules
   (quote
    (org-bbdb org-bibtex org-docview org-gnus org-info org-irc org-mhe
org-rmail org-w3m org-drill)))
 '(package-selected-packages (quote (org org-plus-contrib evil)))
 '(visible-bell t))
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 )

; (require 'evil)
; (evil-mode 1)

(require 'package)
(add-to-list 'package-archives '("org" . "https://orgmode.org/elpa/";) t)


--
Luboš Bouček <address@hidden>