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Re: [O] Arithmetic range error


From: Colin Baxter
Subject: Re: [O] Arithmetic range error
Date: Fri, 08 Feb 2019 08:54:14 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)

>>>>> "Kyle" == Kyle Meyer <address@hidden> writes:

    Kyle> Nicolas Goaziou <address@hidden> writes:
    >> Colin Baxter <address@hidden> writes:
    >> 
    >>> I can now confirm that if the above commit is reversed then my
    >>> Arithmetic range error disappears.
    >>> 
    >>> diff --git a/lisp/ox-publish.el b/lisp/ox-publish.el index
    >>> d9fc8d2..2144aa1 100644 --- a/lisp/ox-publish.el +++
    >>> b/lisp/ox-publish.el @@ -1366,7 +1366,9 @@ does not exist."
    >>> (expand-file-name (or (file-symlink-p file) file)
    >>> (file-name-directory file))))) (if (not attr) (error "No such
    >>> file: \"%s\"" file) - (floor (float-time
    >>> (file-attribute-modification-time attr)))))) + (+ (ash (car (nth
    >>> 5 attr)) 16) + (cadr (nth 5 attr)))))) +;; (floor (float-time
    >>> (file-attribute-modification-time attr))))))
    >> 
    >> I think it is worth reporting it to Emacs devel list, because the
    >> commented code doesn't look wrong.

    Kyle> And in the report it'd be good to include some of the
    Kyle> information asked for elsewhere in this thread (full
    Kyle> backtrace, system details) as well as a recipe to reproduce.
    Kyle> I haven't had any luck triggering the issue, but that's
    Kyle> unsurprisingly given that the code looks correct and the
    Kyle> number reported in the error isn't extreme:

    Kyle>     (floor 1549541220.7500212) ; => 1549541220
    Kyle> (format-time-string "%Y-%m-%d %I:%M:%S" (seconds-to-time
    Kyle> 1549541220.7500212)) ; => "2019-02-07 07:07:00"

With a very inelegant ECM below, I can reproduce the arithmetic range
error in emacs-26.1 but not in the development emacs-27.0.50. I have
tested the ECM on machines running Debian 3.16.0-7-686-pae and
4.9.0-8-686-pae, with the same results.

1. emacs -Q <RET>

2. We need a directory for testing. This ECM uses ~/temp.

3. In the scratch buffer, evaluate the following:

#+begin_src emacs-lisp
(add-to-list 'load-path (expand-file-name "~/path/to/git/org-mode/lisp"))
#+end_src

#+begin_src emacs-lisp
(setq org-publish-project-alist
      '(("org"
         :base-directory "~/temp/"
         :publishing-directory "~/temp"
         :publishing-function org-html-publish-to-html)))
#+end_src

4. Create file ~/temp/test.org.

5. Enter some text (e.g. This is a test) in test.org and save file.

6. M-x org-publish-current-file <RET>.

7. A satisfactory ~/temp/test.html is produced.

8. emacs-26.1 gives 'org-publish-cache-ctime-of-src: Arithmetic range error'.

9. emacs-27.0.50 gives no arithmetic range error.

10. Also no errors are produced if emacs-26.1 and emacs-27.0.50 use only
their generic org-modes, namely 'release_9.1.9-65-g5e4542'.

I hope to post a report to emacs-dev later today.

Best wishes,

-- 
Colin Baxter
address@hidden



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