[BUG] org-agenda column view error: wrong type markerp, nil [9.6.9 ( @ /path/to/org-9.6.9/)]

[BUG] org-agenda column view error: wrong type markerp, nil [9.6.9 ( @ /path/to/org-9.6.9/)]

[John Borwick]

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Hello! After updating org-mode, when I do the below:

  1. Run a custom org-agenda =C-c a w= that has a column view format. (This works correctly)
  2. Open a different buffer
  3. Re-run org-agenda

I get the error =Wrong type argument: markerp, nil=.

Using the debugger, I found the error occurred in =org-colview.el=. I no longer have the error when using the below workaround.

#+begin_src patch
--- #<buffer org-colview-orig.el>
+++ #<buffer org-colview.el>
@@ -525,6 +525,8 @@
       (setq header-line-format org-previous-header-line-format)
       (kill-local-variable 'org-previous-header-line-format)
       (remove-hook 'post-command-hook #'org-columns-hscroll-title 'local))
+    (setq org-columns-begin-marker (make-marker))
     (set-marker org-columns-begin-marker nil)
     (when (markerp org-columns-top-level-marker)
       (set-marker org-columns-top-level-marker nil))
#+end_src

Emacs  : GNU Emacs 28.2 (build 1, x86_64-apple-darwin18.7.0, NS appkit-1671.60 Version 10.14.6 (Build 18G95))
 of 2023-02-22
Package: Org mode version 9.6.9 ( @ /path/to/org-9.6.9/)
-- 
John Borwick

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Re: [BUG] org-agenda column view error: wrong type markerp, nil [9.6.9 ( @ /path/to/org-9.6.9/)]

[Ihor Radchenko]

John Borwick <borwick@uw.edu> writes:

> Hello! After updating org-mode, when I do the below:
>
>   1. Run a custom org-agenda =C-c a w= that has a column view format. (This works correctly)
>   2. Open a different buffer
>   3. Re-run org-agenda
>
> I get the error =Wrong type argument: markerp, nil=.
>
> Using the debugger, I found the error occurred in =org-colview.el=. I no longer have the error when using the below workaround.
>
> #+begin_src patch
> --- #<buffer org-colview-orig.el>
> +++ #<buffer org-colview.el>
> @@ -525,6 +525,8 @@
>        (setq header-line-format org-previous-header-line-format)
>        (kill-local-variable 'org-previous-header-line-format)
>        (remove-hook 'post-command-hook #'org-columns-hscroll-title 'local))
> +    (setq org-columns-begin-marker (make-marker))
>      (set-marker org-columns-begin-marker nil)

Thanks for reporting! The reproducer is not sufficient to replicate the
bug on my side, but the code can indeed fail with the error you are
seeing.

I applied an alternative patch onto bugfix:
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=bd3705c05

Let me know if the patch fixes the problem for you.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>