\scriptstyle affects \overline

Question

The following code

% !TEX program = XeLaTeX 
\documentclass{article}
    \usepackage{unicode-math,mathtools}
\begin{document}
    $\overline{A}\overline{A}\mathrlap{A}$
\end{document}

gives

Going deeper

Through some experiments, I found that mathtools and \mathclap are not to blame.

% !TEX program = XeLaTeX 
\documentclass{article}
    \usepackage{unicode-math}
\begin{document}
    $\overline{B}\overline{B}\hbox{$\scriptstyle B$}$
\end{document}

This disagreement is restricted to

The packageunicode-math
XeLaTeX (LuaLaTeX is fine)
The first \overline (The second is fine. \underline is fine)
\hbox containing scriptstyle and something printable.

One may also try this

$\overline{C}\overline{C}\mathchoice{}{}{}{\hbox{$\scriptstyle C$}}$

I have no idea how to go deeper. Any idea?

Oh, you're using XeLaTeX. Keep in mind that \fontdimens are messed up there. This is basically another incarnation of the problem reported here: Why is the fraction off the math axis in XeTeX?. Use LuaLaTeX instead. — Henri Menke, Aug 05 '16 at 16:28
Thanks for reference. For me I can easily get over this case by case. I will leave it here. (By the way, in your example the fraction is always off. And here, it becomes even weirder.) — Symbol 1, Aug 05 '16 at 16:56
@HenriMenke: I guess this question concerned another incarnation of the same bug. — GuM, May 05 '17 at 21:43

score 2 · Accepted Answer · answered May 05 '17 at 20:44

2

This bug has been resolved. Both in TeXLive2017 and in a current miktex the output of a xelatex compilation is fine:

answered May 05 '17 at 20:44

Ulrike Fischer

327,261

\scriptstyle affects \overline

Going deeper

1 Answers1

Linked