I have no idea how to transpose the following latex example to
context. Also in my opinion the input is wrong, it should be written
as \mathtestbase{fb}^{-1} (and this works fine).
So I'm only posting this for the case that it indicates some hidden
problem in the fontloader.
The error I get from the document below is
! error: (nodes): attempt to double-free math_char node 100300,
ignored
! ==> Fatal error occurred, no output PDF file produced!
The fonts used are
[latinmodern-math.otf]:mode=base;script=math;language=DFLT;
and
STIXTwoText:mode=base;script=latn;language=DFLT;
Imho the relevant points to trigger the error are
- a math alphabet which uses mode=base
- a ligature in this font (fb here)
- a following math symbol directly behind the ligature (\int would
give an error too).
\documentclass{article}
\usepackage{unicode-math}
\setmathfontface\mathtestbase{STIX Two Text}[Renderer=Basic]
\begin{document}
$\mathtestbase{fb^{-1}}$
\end{document}
--
Ulrike Fischer
http://www.troubleshooting-tex.de/
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