Error with Vimwiki: Range too large in character class

[yohannes]

Does anyone use Vimwiki with VMT? I just upgraded my instance of Vimwiki to 2.5 and now, any generated TOC link caused the following error when jumping to the item it points to:

Error Detected while processing function vimwiki#base#follow_link[69] .. vimwiki#base#open_link[34] .. vimwiki#base#edit_file[32] .. <SNR>46_jump_to_anchor[12] .. <SNR>46_jump_to_segment: 
line 23:
E945: Range to large in character class

However, I have no problem jumping from links generated by Vimwiki. Any pointer on how to investigate this error further?

Best,
Yohannes

[dom-k]

Hello, 6 years later I came across this post while searching for the same issue I have on macos using vimwiki (sorry for reincarnating this issue). Generating a TOC with :VimwikiTOC is throwing the same error.

AI suggested me to temporarily change a specific return value in the vimwiki plugin:
~/.vim/bundle/vimwiki/autoload/vimwiki/u.vim

Find

return '[^0-9a-zA-Z\u4e00-\u9fff_ \-]'

and change it to:

return '[^0-9a-zA-Z_ \-]'

This worked for me, the TOCs are created properly for me again.

More info

My vimwiki version:

Version: 2024.01.24                                                       
Os: Mac
Vim: 901
Branch: dev
Revision: a54a300
Date: 2026-04-30 12:15:09 -0600

My vim version:

VIM - Vi IMproved 9.1 (2024 Jan 02, compiled Apr 18 2026 20:29:32)