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Bug using breqn and babel

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3

I've hit a bug that I cannot fix (no warnings/errors in the logs).

Here is a mwe:

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



begin{document}

  [{A, B, C}]



  selectlanguage{french}

  [{A, B, C}]



  selectlanguage{english}

  [{A, B, C}]

end{document}

I use the following command to compile:

$ latexmk -lualatex bug.tex

The output is as follows, the commas are mapped to a Gamma symbol !?

Does anyone have a clue on how to fix this ?

$ lualatex --version

This is LuaTeX, Version 1.07.0 (TeX Live 2018)

$ latexmk --version

Latexmk, John Collins, 17 Jan. 2018. Version 4.55

luatex breqn

share|improve this question

edited 4 hours ago

neok

asked 8 hours ago

neokneok

1909

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  breqn is a nice proof-of-concept, but it's incompatible with a wealth of packages.
  
  – egreg
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  See also tex.stackexchange.com/a/483852/2388
  
  – Ulrike Fischer
  6 hours ago
  

  
  
  
  

add a comment | 

3

I've hit a bug that I cannot fix (no warnings/errors in the logs).

Here is a mwe:

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



begin{document}

  [{A, B, C}]



  selectlanguage{french}

  [{A, B, C}]



  selectlanguage{english}

  [{A, B, C}]

end{document}

I use the following command to compile:

$ latexmk -lualatex bug.tex

The output is as follows, the commas are mapped to a Gamma symbol !?

Does anyone have a clue on how to fix this ?

$ lualatex --version

This is LuaTeX, Version 1.07.0 (TeX Live 2018)

$ latexmk --version

Latexmk, John Collins, 17 Jan. 2018. Version 4.55

luatex breqn

share|improve this question

edited 4 hours ago

neok

asked 8 hours ago

neokneok

1909

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  breqn is a nice proof-of-concept, but it's incompatible with a wealth of packages.
  
  – egreg
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  See also tex.stackexchange.com/a/483852/2388
  
  – Ulrike Fischer
  6 hours ago
  

  
  
  
  

add a comment | 

I've hit a bug that I cannot fix (no warnings/errors in the logs).

Here is a mwe:

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



begin{document}

  [{A, B, C}]



  selectlanguage{french}

  [{A, B, C}]



  selectlanguage{english}

  [{A, B, C}]

end{document}

I use the following command to compile:

$ latexmk -lualatex bug.tex

The output is as follows, the commas are mapped to a Gamma symbol !?

Does anyone have a clue on how to fix this ?

$ lualatex --version

This is LuaTeX, Version 1.07.0 (TeX Live 2018)

$ latexmk --version

Latexmk, John Collins, 17 Jan. 2018. Version 4.55

luatex breqn

share|improve this question

edited 4 hours ago

neok

asked 8 hours ago

neokneok

1909

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



begin{document}

  [{A, B, C}]



  selectlanguage{french}

  [{A, B, C}]



  selectlanguage{english}

  [{A, B, C}]

end{document}

$ latexmk -lualatex bug.tex

$ lualatex --version

This is LuaTeX, Version 1.07.0 (TeX Live 2018)

$ latexmk --version

Latexmk, John Collins, 17 Jan. 2018. Version 4.55

share|improve this question

edited 4 hours ago

neok

asked 8 hours ago

neokneok

1909

share|improve this question

edited 4 hours ago

neok

asked 8 hours ago

neokneok

1909

asked 8 hours ago

neokneok

1909

asked 8 hours ago

neokneok

1909

2 Answers
2

active

oldest

votes

2

The babel-french module does std@math@comma upon entering and also exiting French language blocks.

This resets the mathcode for the comma to the standard, but breqn wants that the mathcode stays "8000.

Simply make std@math@comma to do nothing.

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



makeatletter

letstd@math@commarelax

makeatother



begin{document}



[{A, B, C}]



selectlanguage{french}

[{A, B, C}]



selectlanguage{english}

[{A, B, C}]



end{document}

You should be aware that breqn is not really compatible with several package and is better not used in serious typesetting tasks.

share|improve this answer

answered 4 hours ago

egregegreg

745k8919513291

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great investigation egreg, many thanks for the detailed explanations !
  
  – neok
  4 hours ago
  
  
  

  
  
  
  

add a comment | 

1

For lualatex use

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}

usepackage{unicode-math}

...

share|improve this answer

answered 7 hours ago

Red-CloudRed-Cloud

3,363214

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thanks, this works for this particular mwe but throws tons of errors for my huge document. I also see that unicode-math is quite eqperimental ?
  
  – neok
  6 hours ago
  

  
  
  
  

add a comment | 

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2

The babel-french module does std@math@comma upon entering and also exiting French language blocks.

This resets the mathcode for the comma to the standard, but breqn wants that the mathcode stays "8000.

Simply make std@math@comma to do nothing.

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



makeatletter

letstd@math@commarelax

makeatother



begin{document}



[{A, B, C}]



selectlanguage{french}

[{A, B, C}]



selectlanguage{english}

[{A, B, C}]



end{document}

You should be aware that breqn is not really compatible with several package and is better not used in serious typesetting tasks.

share|improve this answer

answered 4 hours ago

egregegreg

745k8919513291

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great investigation egreg, many thanks for the detailed explanations !
  
  – neok
  4 hours ago
  
  
  

  
  
  
  

add a comment | 

2

The babel-french module does std@math@comma upon entering and also exiting French language blocks.

This resets the mathcode for the comma to the standard, but breqn wants that the mathcode stays "8000.

Simply make std@math@comma to do nothing.

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



makeatletter

letstd@math@commarelax

makeatother



begin{document}



[{A, B, C}]



selectlanguage{french}

[{A, B, C}]



selectlanguage{english}

[{A, B, C}]



end{document}

You should be aware that breqn is not really compatible with several package and is better not used in serious typesetting tasks.

share|improve this answer

answered 4 hours ago

egregegreg

745k8919513291

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great investigation egreg, many thanks for the detailed explanations !
  
  – neok
  4 hours ago
  
  
  

  
  
  
  

add a comment | 

The babel-french module does std@math@comma upon entering and also exiting French language blocks.

This resets the mathcode for the comma to the standard, but breqn wants that the mathcode stays "8000.

Simply make std@math@comma to do nothing.

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



makeatletter

letstd@math@commarelax

makeatother



begin{document}



[{A, B, C}]



selectlanguage{french}

[{A, B, C}]



selectlanguage{english}

[{A, B, C}]



end{document}

You should be aware that breqn is not really compatible with several package and is better not used in serious typesetting tasks.

share|improve this answer

answered 4 hours ago

egregegreg

745k8919513291

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}



makeatletter

letstd@math@commarelax

makeatother



begin{document}



[{A, B, C}]



selectlanguage{french}

[{A, B, C}]



selectlanguage{english}

[{A, B, C}]



end{document}

share|improve this answer

answered 4 hours ago

egregegreg

745k8919513291

answered 4 hours ago

egregegreg

745k8919513291

answered 4 hours ago

egregegreg

745k8919513291

1

For lualatex use

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}

usepackage{unicode-math}

...

share|improve this answer

answered 7 hours ago

Red-CloudRed-Cloud

3,363214

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thanks, this works for this particular mwe but throws tons of errors for my huge document. I also see that unicode-math is quite eqperimental ?
  
  – neok
  6 hours ago
  

  
  
  
  

add a comment | 

1

For lualatex use

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}

usepackage{unicode-math}

...

share|improve this answer

answered 7 hours ago

Red-CloudRed-Cloud

3,363214

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thanks, this works for this particular mwe but throws tons of errors for my huge document. I also see that unicode-math is quite eqperimental ?
  
  – neok
  6 hours ago
  

  
  
  
  

add a comment | 

For lualatex use

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}

usepackage{unicode-math}

...

share|improve this answer

answered 7 hours ago

Red-CloudRed-Cloud

3,363214

documentclass{article}

usepackage[english,french]{babel}

usepackage{breqn}

usepackage{unicode-math}

...

share|improve this answer

answered 7 hours ago

Red-CloudRed-Cloud

3,363214

answered 7 hours ago

Red-CloudRed-Cloud

3,363214

answered 7 hours ago

Red-CloudRed-Cloud

3,363214