--pdf-engine=wkhtmltopdf always fails in pandoc 3.6

[Choonholic]

To do:
Convert markdown document to PDF applied style.css

Prerequisites
Pandoc 3.6
wkhtmltopdf 0.12.6

Reproducing:

pandoc source.md -f markdown -o dest.pdf --pdf-engine=wkhtmltopdf

Symptoms:
Pandoc 3.5 worked perfectly.

But, Pandoc 3.6 always failed from 1st step like below.

Error: Failed loading page file://toPC54C.source (sometimes it will work just to ignore this error with --load-error-handling ignore)
Exit with code 1, due to unknown error.
Error producing PDF.`

Unfortunately, --load-error-handling ignore did not help.

Thanks.

[jgm]

That error message comes from wkhtmltopdf, not pandoc.
If you want to pass --load-error-handling ignore to wkhtmltopdf, you'll have to use this option in pandoc:

--pdf-engine-opt=--load-error-handling --pdf-engine-opt=ignore

[jgm]

If it works with pandoc 3.5 (I assume you have tested recently with same wkhtmltopdf version), then perhaps the culprit is this item in the changelog:

    + Use `.source` extension, not `.html`, in `toPdfViaTempFile` (#10314).

[Choonholic]

Yes, pandoc 3.5 worked perfectly with the same configuration.
I will review the changelog and report the result.

Thanks.

However, passing --pdf-engine-opt parameters did not help.

[Choonholic]

When I use wkhtmltopdf separately, it works as expected. (Both of Pandoc 3.5 and 3.6, wkhtmltopdf 0.12.6)

pandoc -f markdown -o out.html -c style.css --embed-resources --standalone source.md
wkhtmltopdf --enable-local-file-access out.html out.pdf

I absolutely agree the changes by #10314 are the reason of the symptoms.

Tnanks.