\big, \bigg et al macros

[hvoss49]

There is some funny behaviour with all \big, \bigg and so on macros. For example:

\documentclass{article}
%\usepackage{fontspec}
\begin{document}
$\begin{array}{*{17}c}
() & [\,] & <> & /|\backslash & \lmoustache\,\rmoustache & \arrowvert\vert & \Vert\,\Arrowvert & 
\uparrow\downarrow & \updownarrow & \Uparrow\Downarrow & \Updownarrow & \langle\rangle & 
\lbrace\rbrace & \lceil\,\rceil & \lfloor\,\rfloor & \lgroup\rgroup & \bracevert  \\
%
\Bigg(\Bigg) & \Bigg[\,\Bigg] & \Bigg<\Bigg> & \Bigg/\Bigg|\Bigg\backslash & 
\Bigg\lmoustache\,\Bigg\rmoustache & \Bigg\arrowvert\Bigg\vert & \Bigg\Vert\,\Bigg\Arrowvert & 
\Bigg\uparrow\Bigg\downarrow & \Bigg\updownarrow & \Bigg\Uparrow\Bigg\Downarrow & 
\Bigg\Updownarrow & \Bigg\langle\Bigg\rangle & \Bigg\lbrace\Bigg\rbrace & 
\Bigg\lceil\,\Bigg\rceil & \Bigg\lfloor\,\Bigg\rfloor & \Bigg\lgroup\Bigg\rgroup & 
\Bigg\bracevert
\end{array}$
\end{document}

The output with Computer Modern Math looks ok. Using Latin Modern Math (uncommenting package fontspec) gives different wrong results for XeLaTeX and for LuaLaTeX. I am using up-to-date TL2017 and Linux (Ubuntu)

[eg9]

I tried, but cannot reproduce the issue. I have updated my TeX Live (MacTeX) to the last possible minute. I just added [4ex] to your array in order to space the rows and geometry not to have an overfull box.

\documentclass{article}
\usepackage[a4paper,margin=2cm]{geometry}
\usepackage{ifxetex,ifluatex}

\ifxetex
  \usepackage{fontspec}
\else
  \ifluatex
    \usepackage{fontspec}
  \fi
\fi

\begin{document}
\ifxetex
  XeTeX
\else
  \ifluatex
    LuaTeX
  \else
    pdftex
  \fi
\fi

\bigskip

$\begin{array}{*{17}c}
() & [\,] & <> & /|\backslash & \lmoustache\,\rmoustache & \arrowvert\vert & \Vert\,\Arrowvert & 
\uparrow\downarrow & \updownarrow & \Uparrow\Downarrow & \Updownarrow & \langle\rangle & 
\lbrace\rbrace & \lceil\,\rceil & \lfloor\,\rfloor & \lgroup\rgroup & \bracevert  \\[4ex]
%
\Bigg(\Bigg) & \Bigg[\,\Bigg] & \Bigg<\Bigg> & \Bigg/\Bigg|\Bigg\backslash & 
\Bigg\lmoustache\,\Bigg\rmoustache & \Bigg\arrowvert\Bigg\vert & \Bigg\Vert\,\Bigg\Arrowvert & 
\Bigg\uparrow\Bigg\downarrow & \Bigg\updownarrow & \Bigg\Uparrow\Bigg\Downarrow & 
\Bigg\Updownarrow & \Bigg\langle\Bigg\rangle & \Bigg\lbrace\Bigg\rbrace & 
\Bigg\lceil\,\Bigg\rceil & \Bigg\lfloor\,\Bigg\rfloor & \Bigg\lgroup\Bigg\rgroup & 
\Bigg\bracevert
\end{array}$
\end{document}

Compiling with pdflatex, xelate and lualatex gives the following results

[hvoss49]

Confirmed, on MacOSX it works fine, but my examples were created under Linux. Under MAC lualatex/xelatex still uses the cmm, but not the lmm. Load unicode-math instead of fontspec and you'll see that it is different. Here the output with MacOSX:

[u-fischer]

I don't understand the remarks about computer modern math and latin modern math: fontspec doesn't change the math setup (at least not the delimiters) and you are not loading unicode-math, so I would expect that your example use the standard cmm fonts (cmex10.pfb etc) and this is what happens for me on windows. (I would not expect the wrong glyphs and I don't get them on windows). You can force lmm-fonts by loading lmodern before fontspec.

[hvoss49]

As I already wrote when running under Linux with loading fontspec, latex uses lmm and not cmm.With cmm all is fine.

[u-fischer]

It doesn't for me. Can you show the log-file of a lualatex compilation of the example with fontspec?

[hvoss49]

FOO.log

[davidcarlisle]

your log file shows unicode-math is being used ?

…

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[u-fischer]

You are loading unicode-math, and with it I can reproduce the issue.

[u-fischer]

With unicode-math the issue is easy to explain: \lmoustache and \rmoustache are not in the font, \arrowvert and the other "curious" outputs are not defined by unicode-math and so you get whatever the old mathcodes points to. The issue should be moved to the unicode-math issue tracker.