[tex-live] is luatex parsing of first line off?

[jfbu]

Hi,

sorry if perhaps off-list 

I have problems with first line %&formatname and luatex

Consider this

$ luatex -ini -jobname myformat \&lualatex \\def\\foo{foo} \\dump

It works.

Then consider file testlualatex.tex
whose contents are

%&myformat
\documentclass{article}

\begin{document}
hello

\foo
\end{document}


and try

$ luatex testluatex.tex 
This is LuaTeX, Version 1.07.0 (TeX Live 2018) 
 restricted system commands enabled.
(./testluatex.tex
! Undefined control sequence.
l.2 \documentclass
                {article}
? X

warning  (pdf backend): no pages of output.
Transcript written on testluatex.log.


On the other hand

$ luatex \&myformat testluatex.tex

does work.

Now repeat the whole thing with xetex or pdftex, then it works.

For example

$ xetex -ini -jobname myformat \&xelatex \\def\\foo{foo} \\dump

Then 

$ xetex testluatex.tex 
This is XeTeX, Version 3.14159265-2.6-0.99999 (TeX Live 2018) (preloaded format=myformat)
 restricted \write18 enabled.
entering extended mode
(./testluatex.tex
LaTeX2e <2018-04-01> patch level 5
(/usr/local/texlive/2018/texmf-dist/tex/latex/base/article.cls
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
(/usr/local/texlive/2018/texmf-dist/tex/latex/base/size10.clo))
(./testluatex.aux) [1] (./testluatex.aux) )
Output written on testluatex.pdf (1 page).
Transcript written on testluatex.log.


(sorry for filename... it should have been testformat.tex)

Best

Jean-François