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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
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  • Something loaded by your init file is clearly trying to invoke that missing function. Bisect your init file to find the culprit. If the problem comes from some code your init file loads then that will tell which code file that is. If necessary you can then bisect that file. – Drew Apr 21 at 18:47
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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.

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  • That did it, thanks! – chrimuelle Apr 26 at 7:12

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