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Arithmetic range error
From: |
Colin Baxter |
Subject: |
Arithmetic range error |
Date: |
Fri, 08 Feb 2019 10:55:46 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) |
I originally posted an Arithmetic range error using org-publish to
gmane.emacs.orgmode. My original post is
[[gnus:address@hidden
It was suggested that I also report it to emacs-dev. The error occurs
using org-mode from git and seems to effect emacs-26.1 but not
emacs-27.0.50. With a very inelegant ECM below, I can reproduce the
arithmetic range error. I have tested the ECM on machines running Debian
3.16.0-7-686-pae and Debian 4.9.0-8-686-pae, with the same results.
------ Begin ECM -------------
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: "floor", 1549541220.7500212'
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'.
------ End ECM -------------
The issue is apparently triggered by a backport of Emacs's 662bee7d7,
specifically:
* lisp/ox-publish.el (org-publish-cache-ctime-of-src):
Prefer float-time to doing time arithmetic by hand.
[...]
@@ -1364,8 +1366,7 @@ (defun org-publish-cache-ctime-of-src (file)
(expand-file-name (or (file-symlink-p file) file)
(file-name-directory file)))))
(if (not attr) (error "No such file: \"%s\"" file)
- (+ (ash (car (nth 5 attr)) 16)
- (cadr (nth 5 attr))))))
+ (floor (float-time (file-attribute-modification-time attr))))))
It would appear that the code is sound, but if the above commit is
reversed then the error disappears.
--
Colin Baxter
address@hidden
- Arithmetic range error,
Colin Baxter <=
- Re: Arithmetic range error, Robert Pluim, 2019/02/08
- Re: Arithmetic range error, Colin Baxter, 2019/02/08
- Re: Arithmetic range error, Robert Pluim, 2019/02/08
- Re: Arithmetic range error, Eli Zaretskii, 2019/02/08
- Re: Arithmetic range error, Robert Pluim, 2019/02/08
- Re: Arithmetic range error, Eli Zaretskii, 2019/02/08
- Re: Arithmetic range error, Robert Pluim, 2019/02/08
- Re: Arithmetic range error, Nicolas Goaziou, 2019/02/08
- Re: Arithmetic range error, Colin Baxter, 2019/02/09
- Re: Arithmetic range error, Paul Eggert, 2019/02/10