Posted by ctargett on Oct 18, 2018; 8:50pm
URL: https://discuss.asciidoctor.org/Slim-Engine-Option-asciidoc-invalid-with-custom-templates-and-Jekyll-tp6477p6537.html

You know, your idea about an incompatibility with Slim versions made me check what happened with another version, and if I use Slim v3.0 (which asciidoctor-html5 uses), instead of 4.0.1, I don't get those errors at all. That's actual fine for us - it's the "scary" errors I don't want to introduce into our build process output, I don't think we really care which Slim version we use.

I'll still file an issue anyway warning them and other users about the problem.