bug#18617: 24.3; loading simple-wiki-mode breaks org-mode

bug#18617: 24.3; loading simple-wiki-mode breaks org-mode

[Marcin Borkowski]

On 2014-10-02, at 20:27, vmon@riseup.net wrote:

> To re-trigger:
> - Install simple-wiki-mode
> - run emacs
> - switch to *scratch*
> - load org-mode
> - make two todos one with subtree:
> * TODO test 1
>   - test 2
> * TODO test 3
> - check pressing tab on First todo hide and show the subtree
> - open a new file: test.txt
> - M-x simple-wiki-mode (on test.txt)
> - switch back to *scratch* (which is still in org-mode)
> - Observe that subtree function is broken.
> - Press tab on TODO test 1 will hide * TODO test 3 and never shows it
> again.

Hello,

I know it was quite a long time ago, but could you confirm that this is
still an issue in current Emacs?  Also, I tried to reproduce it on GNU
Emacs 25.1.50.3, but could not - M-x simple-wiki-mode (after downloading
simple-wiki.el from savannah) resulted in a "setq: Symbol’s function
definition is void: first" error.  (simple-wiki is not an Elpa package,
so I could not install it via the package manager.)

If the problem is still present, please describe exactly how you
installed simple-wiki-mode so that I could see for myself what's
happening.

> Thanks,
> humble emacs user

Best,

-- 
Marcin Borkowski

Re: bug#18617: 24.3; loading simple-wiki-mode breaks org-mode

[Kaushal Modi]

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I can recreate that bug.

The "first" alias is defined in the cl library. So you would need to
(require 'cl) before requiring simple-wiki.

I eval'd simple-wiki from here:
http://cvs.savannah.gnu.org/viewvc/*checkout*/http-emacs/http-emacs/simple-wiki.el

I haven't yet looked into the internals of simple-wiki.el to investigate
what's breaking the visibility cycling.
Basically TAB or S-TAB stop cycling the visibility; they seem to do nothing.

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Re: bug#18617: 24.3; loading simple-wiki-mode breaks org-mode

[Kaushal Modi]

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A quick look at the code shows that it pollutes the namespace with
undeclared and un-let-bound variables like "tag" (and there could be more
like that).

If we investigate further, we might find a culprit like that that's causing
this problem.

(defun simple-wiki-get-tag ()
  (let (prompt)
    (if (and simple-wiki-tag-history (car simple-wiki-tag-history))
        (setq prompt (concat "Tag (" (car simple-wiki-tag-history) "): "))
      (setq prompt "Tag: "))
    (setq tag (completing-read prompt simple-wiki-tag-list nil nil ""
                               'simple-wiki-tag-history
                               (car simple-wiki-tag-history))))
  (unless (assoc tag simple-wiki-tag-list)
    (add-to-list 'simple-wiki-tag-list (cons tag nil)))
  tag)

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bug#18617: bug#18617: 24.3; loading simple-wiki-mode breaks org-mode

[Noam Postavsky]

# not an Emacs bug
tags 18617 notabug
close 18617
quit

Kaushal Modi <kaushal.modi@gmail.com> writes:

> A quick look at the code shows that it pollutes the namespace with
> undeclared and un-let-bound variables like "tag" (and there could be
> more like that).
>
> If we investigate further, we might find a culprit like that that's
> causing this problem.

Looks like this is a bug in simple-wiki-mode, not in Emacs.