Undo-Tree discarding undo history: "No further undo information"

[maptv]

Description :octocat:

Undo-Tree discarding undo history leads to "No further undo information" message.

I cannot get persistent undo to work consistently in spacemacs. Here is a link to my config: https://github.com/maptv/setup/blob/main/.spacemacs I am installing in the typical location (.emacs.d). I tried re-installing Spacemacs with different Emacs versions. I have tried all sorts of undo settings, but took them all out of my config because nothing was working.

Reproduction guide :beetle:

1. Start Emacs with my config: https://github.com/maptv/setup/blob/main/.spacemacs
2. Open a file
3. Make a change
4. Exit the current session
5. Start a new session
6. Press u

Observed behaviour: :eyes: :broken_heart:

The message "No further undo information" is displayed.

By pressing SPC w p m, I find this error:

Buffer has been modified since undo-tree history was saved to
      "~/.emacs.d/.cache/undo-tree-history/.!Users!uname!uname!repo!.file.~undo-tree~"; could not load undo-tree history

I believe this error means that Undo-Tree has missed a beat and gave up completely. Is there some way to ensure that this never happens? Hooks that save/load undo history when closing/opening a file?

Expected behaviour: :heart: :smile:

Press u in normal state to undo the most recent change.

System Info :computer:

• OS: darwin
• Emacs: 28.2
• Spacemacs: 0.999.0
• Spacemacs branch: develop (rev. 26629bf3a)
• Graphic display: nil
• Running in daemon: nil
• Distribution: spacemacs
• Editing style: vim
• Completion: helm
• Layers:

  (vimscript lua auto-completion emacs-lisp evil-snipe git helm markdown multiple-cursors osx version-control treemacs)

• System configuration features: ACL GMP GNUTLS JSON LIBXML2 MODULES NOTIFY KQUEUE PDUMPER THREADS ZLIB

Backtrace :paw_prints:

Buffer has been modified since undo-tree history was saved to
      "~/.emacs.d/.cache/undo-tree-history/.!Users!uname!uname!repo!.file.~undo-tree~"; could not load undo-tree history

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Please let us know if this issue is still valid!

[smile13241324]

Undo-tree is not longer supported due to its unmaintained state. Please switch to undo-fu and reopen when the issue is still there