I was attempting to generate different programming languages code snippets to highlight the different syntax in different programming languages like: Python, Matlab and C++ (more to be added later).

In the code given below, I am getting the error:

! TeX capacity exceeded, sorry [input stack size=5000]. \cl@chapter ->\cl@chapter \@elt {matlab} l.73 ...code,number within=chapter]{\inputcppcode} [3][]{listing options={lan...

Can you tell me how to get rid of this error to get my file to compile correctly?



\documentclass[a4paper, 10pt, oneside, fleqn, openright]{article}




\definecolor{mainColor}{RGB}{211, 47, 47} % some dark red

    numbersep= 7mm,
    keywords={var, func, extends},
    xleftmargin=3mm,% marge ajouté à gauche du tableau (à configurer en dernier pour l'alignement global du tableau)
    framesep=2mm, %distance texte bord du cadre (limite de la background color)

\newtcblisting[use counter=lstlisting]{codeblock}[2][]{%
        fonttitle=\bfseries,before upper={\hspace*{-1em}\codeimgpy~#2},%
        title after break={\centering\footnotesize\itshape\strut\lstlistingname~\thelstlisting~--~continued},%
        listing only,listing options={xleftmargin=-1mm},
        after upper={\centering\strut\lstlistingname~\thelstlisting:~#2},
        frame hidden,arc=0pt,outer arc=0pt,boxrule=0pt,frame code={\draw[gray,line width=2mm] ([xshift=-0.5pt]frame.north west) -- ([xshift=-0.5pt]frame.south west);},#1}

\newtcbinputlisting[use counter=matlab,list inside=matlab,number within=chapter]{\inputmatlab}[3][]{listing options={style=Matlab-editor},%
        fonttitle=\bfseries,before upper={\hspace*{-1em}\codeimg~#2},%
    title after break={\centering\footnotesize\itshape\strut Matlab Code~\thematlab~--~continued},%
     listing only,listing options={xleftmargin=-1mm,#1,style=Matlab-editor},
     after upper={\centering\strut {\bfseries Matlab Code~\thematlab:}~#2},
     frame hidden,arc=0pt,outer arc=0pt,boxrule=0pt,
     listing file={#3},#1}

\newtcbinputlisting[use counter=cppcode,list inside=cppcode,number within=chapter]{\inputcppcode}[3][]{listing options={language=C++},%
        fonttitle=\bfseries,before upper={\hspace*{-1em}\codeimgcpp~#2},%
    title after break={\centering\footnotesize\itshape\strut C++ Code~\thecppcode~--~continued},%
     listing only,listing options={xleftmargin=-1mm,#1,language=C++},
     after upper={\centering\strut {\bfseries C++ Code~\thecppcode:}~#2},
     frame hidden,arc=0pt,outer arc=0pt,boxrule=0pt,
     listing file={#3},#1}


% create a file for output
!touch testFile.txt
fid = fopen('testFile.text', 'w')
for i=1:10
  fprintf(fid,'%6.2f \n', i);


\begin{codeblock}{Les bases de GDScript}
var nombreDeGardes = 4 #déclaration d'une variable
nombreDeGardes = plusDeux(nombreDeGardes) #appel d'une fonction avec la variable nombreDeGardes passée en paramètre

func maFonction(): #cette ligne déclare une nouvelle fonction nommée maFonction
    var variable1 = 7 #nouvelle variable dont la valeur est 7
    variable2 = ['un', 'deux', 'trois'] #variable assignée à un tableau contenant trois chaines de caractères

func plusDeux(argument1):
    return argument1 + 2

\inputmatlab{Expansion Algorithm}{sample.m}

% https://www.programiz.com/cpp-programming/examples/add-numbers
\inputcppcode{Example C++ Code}{cppcodex.cpp}

  • 2
    I can reproduce the error in the much smaller gist.github.com/moewew/90f5a487685014daee58617d37a9a571. The error goes away if I remove the number within=chapter from the second definition ... seems the bug is hiding there. – moewe Nov 18 '18 at 6:27
  • 2
    Come to think of it article does not have sections, so the behaviour of number within=chapter is probably undefined. If I go with something like number within=section, everything seems to be fine. – moewe Nov 18 '18 at 6:31
  • @moewe, Thanks for your inputs. I think you found the solution. If I change the document to book, it works. Thank you! – Joe Nov 18 '18 at 6:33
  • 1
    Indeed the same error can be reproduced with gist.github.com/moewew/… – moewe Nov 18 '18 at 6:36

The problematic code is the numberwithin=chapter in the definitions. The article document class does not have a counter chapter since it does not have \chapters and so resetting by chapter is not really a well-defined concept.

The same issue can be reproduced with


\newtcbinputlisting[use counter=a, number within=chapter]{\inputverba}[1]{listing file={#1}}
\newtcbinputlisting[use counter=b, number within=chapter]{\inputverbb}[1]{listing file={#1}}



and ultimately by tracing back what number within does also with




This error occurs when you want to \@addtoreset a second time to a counter that does not exist.

Incidentally, \@removefromreset has a bit of error checking here, according to source2e (p. 147, file m)

Even through this is internal and the programmer should know what he/she is doing we test here if counter #2 is defined.

but no such error checking is done for \@addtoreset.

The solution is to either pick an existing counter to reset with, i.e. number within=section, or to use a document class with \chapters, i.e. report or book.

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