TeX Live 2016: minted doesn't work with LuaLaTeX (bug fixed in June 2016)

Question

I've installed TeX Live 2016 as it was released today (thanks to the developers for that).

Now I have the following MWE:

\documentclass{article}
\usepackage{minted}
\begin{document}

\begin{minted}{ruby}
class Foo
  def init
    pi = Math::PI
    @var = "Pi is approx. #{pi}"
  end
end
\end{minted}

\end{document}

When running pdflatex --shell-escape test.tex it runs through the file and produces the PDF as expected. Doing the same with lualatex --shell-escape test.tex fails with

This is LuaTeX, Version 0.95.0 (TeX Live 2016) 
 system commands enabled.
(./test.tex
LaTeX2e <2016/03/31>
Babel <3.9r> and hyphenation patterns for 1 language(s) loaded.
(/opt/texlive/2016/texmf-dist/tex/latex/base/article.cls
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
(/opt/texlive/2016/texmf-dist/tex/latex/base/size10.clo))
(/opt/texlive/2016/texmf-dist/tex/latex/minted/minted.sty
(/opt/texlive/2016/texmf-dist/tex/latex/graphics/keyval.sty)
(/opt/texlive/2016/texmf-dist/tex/latex/oberdiek/kvoptions.sty
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/ltxcmds.sty)
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/kvsetkeys.sty
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/infwarerr.sty)
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/etexcmds.sty
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/ifluatex.sty))))
(/opt/texlive/2016/texmf-dist/tex/latex/fancyvrb/fancyvrb.sty
Style option: `fancyvrb' v2.7a, with DG/SPQR fixes, and firstline=lastline fix 
<2008/02/07> (tvz)) (/opt/texlive/2016/texmf-dist/tex/latex/float/float.sty)
(/opt/texlive/2016/texmf-dist/tex/latex/base/ifthen.sty)
(/opt/texlive/2016/texmf-dist/tex/latex/tools/calc.sty)
(/opt/texlive/2016/texmf-dist/tex/latex/ifplatform/ifplatform.sty
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/pdftexcmds.sty
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/ifpdf.sty)
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/luatex-loader.sty
(/opt/texlive/2016/texmf-dist/scripts/oberdiek/oberdiek.luatex.lua)))
(/opt/texlive/2016/texmf-dist/tex/generic/oberdiek/catchfile.sty)
uname -s > "test.w18"

! Package catchfile Error: File `test.w18' not found.

See the catchfile package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.93     \CatchFileDef\@tempa{\ip@file}{}

? 

As mentioned, it's a freshly installed TeX Live 2016; I've also checked the installed Pygmentize version, which is 2.1.3 (installed via pip). Testing with TeX Live 2015, the above code, however, works without problems with both pdflatex and lualatex.

Does anybody have a hint for me on how to fix this, or is it a bug in lualatex or minted (or whatever other package) that should be reported?

Update: With minted version 2.2 (2016-06-08), the package loads the shellesc package automatically, as mentioned by @David Carlisle and @egreg in the comments; therefore, the problem should not occur any more, if you have this version installed.

Answer 1

Several packages using \write18 will need to be updated for compatibility with LuaLaTeX under LuaTeX 0.90; minted is among them.

However, the shellesc package provides the necessary workaround:

\documentclass{article}
\usepackage{shellesc}
\usepackage{minted}

\begin{document}

\begin{minted}{ruby}
class Foo
  def init
    pi = Math::PI
    @var = "Pi is approx. #{pi}"
  end
end
\end{minted}

\end{document}

(credit to ArTourter for noting it).

Here's a set of patches that replace all appearances of \immediate\write18 with \ShellEsc, the safer way without relying on redefinitions of \write.

These patches don't need LuaLaTeX at all, so the code works with all engines.

\documentclass{article}
\usepackage{shellesc,xpatch}
\usepackage{minted}

\makeatletter
\xpatchcmd{\DeleteFile}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\DeleteFile}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\ProvideDirectory}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\TestAppExists}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\TestAppExists}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@checkstyle}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@checkstyle}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@checkstyle}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@checkstyle}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@pygmentize}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@pygmentize}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@pygmentize}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@pygmentize}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd{\minted@pygmentize}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\makeatother

\begin{document}

\begin{minted}{ruby}
class Foo
  def init
    pi = Math::PI
    @var = "Pi is approx. #{pi}"
  end
end
\end{minted}

\end{document}

Note: I can't check the patches on Windows, so they might not be complete in that case.

Shorter code is available if one uses regexpatch:

\documentclass{article}
\usepackage{shellesc,regexpatch}
\usepackage{minted}

\makeatletter
\xpatchcmd*{\DeleteFile}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd*{\ProvideDirectory}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd*{\TestAppExists}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd*{\minted@checkstyle}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\xpatchcmd*{\minted@pygmentize}
  {\immediate\write18}
  {\ShellEscape}
  {}{}
\makeatother

\begin{document}

\begin{minted}{ruby}
class Foo
  def init
    pi = Math::PI
    @var = "Pi is approx. #{pi}"
  end
end
\end{minted}

\end{document}