Hi, had no problems with syntax highlighting on my site appart in that particular post , for an unknown reason, any idea? (I forced lisp syntax)

I think it may be the size of the snippet. When I (very roughly :slight_smile:) chop out a chunk of the first one to make it smaller it then highlights as expected. (In combination with the codeblock line numbering theme component)

Yes it does. Didn’t think about trying because all the other posts work.

@patrickemin what do you want to do with this topic? Should we delete it or is there an actual problem here you need help with? If so can you provide enough detail so we can help you and maybe a screnshot?

Actually, I still have this problem: syntax highlighting doesn’t work for this particular post, but it works for all the others. And so, after testing in safe mode , syntax highlighting works for all posts. This does not explain why, for this particular post, which is nothing out of the ordinary, syn…

If you were to copy/paste that post into a PM here, would it work?

From what I can tell, I think it’s the Code-block line numbers theme component. Specifically with the lisp language. Are there other snippets in lisp that work in other posts? (Just to help narrow down if it’s something specific to that codeblock or if it’s the lisp syntax itself)

[image] JammyDodger: Are there other snippets in lisp that work in other posts? (Just to help narrow down if it’s something specific to that codeblock or if it’s the lisp syntax itself) Yes it’s working everywhere else, for example here .

[image] JammyDodger: From what I can tell, I think it’s the Code-block line numbers theme component. Specifically with the lisp language. Well actually there are two TCs, syntax highlighting and line numbering that should act when I post code on my site, line numbering works but syntax highli…

Ah ok that could be a hint. In fact, I quickly checked and I probably never had a code of that length on my site (I do not know what the maximum length is)

If you disable the line numbering component you should be able to see that the highlighting works as expected (like in safe mode , but more specific). So it appears to be a limitation in the theme component. I’m not sure on the specifics though.

Syntax highlighting not working in a post on my site

Support

tobiaseigen (Tobias Eigen) December 3, 2025, 2:38am 13

@patrickemin have you figured this out? From JammyDodger’s assessment, it seems to be related to te line numbering component, which seems to not work for larger code blocks.

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Syntax highlighting not working in a post on my site

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