xelatex gives a bit more meaningful message - though I still don't 
understand how to remedy this:

[13]

! Missing number, treated as zero.

<to be read again> 

                   (

l.306 \begin

            {minipage}[b]{\linewidth}\raggedright

?

On Wednesday, February 1, 2023 at 4:22:05 PM UTC-5 Mouse Mousevich wrote:

> pandoc-2.19.2, pdflatex from TeXLive-2022.
> Rust-book set of .md files from 
> https://github.com/killercup/trpl-ebook.git (version from 2016).
>
> Conversion to LaTeX seems to succeed, but subsequent invocation of 
> pdflatex fails.
>
> I printed out arguments passed to pandoc:
>
> pandoc args: 
> --from=markdown+smart+grid_tables+pipe_tables-simple_tables+raw_html+implicit_figures+footnotes+intraword_underscores+auto_identifiers-inline_code_attributes 
> --embed-resources --standalone --highlight-style=tango 
> --top-level-division=chapter --table-of-contents 
> --template=lib/template.tex --pdf-engine=pdflatex --to=latex 
> --pdf-engine-opt=--interaction=nonstopmode --variable papersize=letterpaper 
> --output=dist/trpl-2019-05-04.letter.pdf; plus book itself
>
> Error message from pdflatex:
>
> Error producing PDF.
>
> ! Missing number, treated as zero.
>
> <to be read again> 
>
>                    (
>
> l.306 \begin
>
>
> This is what the (apparently) relevant fragment of the LaTeX file looks 
> like:
>
> 299   │ \begin{longtable}[]{@{}
>
>  300   │   >{\raggedright\arraybackslash}p{(\columnwidth - 8\tabcolsep) * 
> \real{0.4189}}
>
>  301   │   >{\raggedright\arraybackslash}p{(\columnwidth - 8\tabcolsep) * 
> \real{0.0676}}
>
>  302   │   >{\raggedright\arraybackslash}p{(\columnwidth - 8\tabcolsep) * 
> \real{0.0676}}
>
>  303   │   >{\raggedright\arraybackslash}p{(\columnwidth - 8\tabcolsep) * 
> \real{0.0676}}
>
>  304   │   >{\raggedright\arraybackslash}p{(\columnwidth - 8\tabcolsep) * 
> \real{0.3784}}@{}}
>
>  305   │ \toprule()
>
>  306   │ \begin{minipage}[b]{\linewidth}\raggedright
>
>  307   │ Target
>
>  308   │ \end{minipage} & \begin{minipage}[b]{\linewidth}\raggedright
>
>  309   │ std
>
>  310   │ \end{minipage} & \begin{minipage}[b]{\linewidth}\raggedright
>
>
>

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