Need help with `expand-region`: Symbol’s function definition is void: org-outline-overlay-data

Question

If I try to use er/expand-region but it fails with Symbol’s function definition is void: org-outline-overlay-data.

org-version : Org mode version 9.2.2

In the release notes for the current org (9.2), it says that org-outline-overlay-data has been removed.

But there is no org-outline-overlay-data in the expand-region code when I search the package directory.

#### System Info
- OS: gnu/linux
- Emacs: 26.1
- Spacemacs: 0.300.0
- Spacemacs branch: develop (rev. fba6d38bf)
- Graphic display: t
- Distribution: spacemacs

Answer 1

just delete ~/.emacs.d/elpa/*/develop/expand-region* and spacemacs will re-install it.

https://github.com/syl20bnr/spacemacs/issues/12099#issuecomment-480904298

@flatwhatson
The problem is that expand-region is byte-compiled with the built-in org, but then the org layer installs a newer version from ELPA which has changed the definition of the org-save-outline-visibility macro, leading to the symbol error.

Answer 2

I'm not using spacemacs, but the problem is still the same.

I'm using use-package and straight.el to manage my packages.

The same problem as noted by BlindingDark in the quote by flatwhatson is the problem.

expand-region is using the built-in org and not the newer one loaded by use-package.

This is easily fixed by telling use-package to load after org has been loaded.

(use-package expand-region
  :after (org)