Using lualatex-dev format for regression tests

[gusbrs]

From https://tex.stackexchange.com/q/611424

When trying to setup l3build tests to use dev formats alongside the current ones, for some reason, the check for lualatex-dev fails immediately after saving it. Since I don't understand well what's going on, it might be my fault somehow, in which case feel free to just close this. But, as far as I can tell, this is unexpected behavior.

A MWE to reproduce the issue:

File ./build.lua:

bundle = ""
module = "mypackage"
checkruns = 2
checkengines =
  {
    "pdftex" ,
    "xetex" ,
    "luatex" ,
    "pdftexdev" ,
    "luatexdev" ,
    "xetexdev"
  }
specialformats = {}
specialformats.latex =
  {
    pdftexdev = { binary = "pdflatex-dev" , format = "" },
    xetexdev  = { binary = "xelatex-dev"  , format = "" },
    luatexdev = { binary = "lualatex-dev" , format = "" },
  }

File ./testfiles/test01.lvt:

\documentclass{article}

\input{regression-test}

\usepackage{hyperref}

\begin{document}

\section{Section 1}
\label{sec:section-1}

\START

\setbox0=\hbox{\ref{sec:section-1}}
\showbox0

\OMIT

\end{document}

Save results for all six formats:

l3build save -e pdftex test01
l3build save -e luatex test01
l3build save -e xetex test01
l3build save -e pdftexdev test01
l3build save -e luatexdev test01
l3build save -e xetexdev test01

And check:

$ l3build check
Running checks on
  test01 (1/1)
          --> failed


  Check failed with difference files
  - ./build/test/test01.luatexdev.diff

./build/test/test01.luatexdev.diff is:

*** ./build/test/test01.luatexdev.tlg	2021-11-26 16:07:10.713204348 -0300
--- ./build/test/test01.luatexdev.log	2021-11-26 16:07:10.713204348 -0300
***************
*** 1,9 ****
  This is a generated file for the l3build validation system.
  Don't change this file in any respect.
  > \box...=
! \hbox(6.44444+0.0)x5.00002
  .\pdfstartlink(*+*)x* attr{/Border[0 0 1]/H/I/C[1 0 0]} action goto name{section.1}
! .\OT1/cmr/m/n/10 1
  .\pdfendlink
  ! OK.
  l. ...\showbox0
--- 1,9 ----
  This is a generated file for the l3build validation system.
  Don't change this file in any respect.
  > \box...=
! \hbox(6.66+0.0)x5.0
  .\pdfstartlink(*+*)x* attr{/Border[0 0 1]/H/I/C[1 0 0]} action goto name{section.1}
! .\TU/lmr/m/n/10 1
  .\pdfendlink
  ! OK.
  l. ...\showbox0

[zauguin]

It's not your fault, there was a bug in some code which detected luatex specific tlg files. It's fixed in the development sources and will be fixed in the next release.

[gusbrs]

@zauguin Thank you very much!