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Underset with empty argument causes rendering error #1580

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cpitclaudel opened this issue Aug 13, 2016 · 3 comments
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Underset with empty argument causes rendering error #1580

cpitclaudel opened this issue Aug 13, 2016 · 3 comments
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@cpitclaudel
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MWE:

<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
  <head>
    <script type="text/javascript" async src="https://cdn.mathjax.org/mathjax/latest/unpacked/MathJax.js?config=TeX-MML-AM_CHTML"> </script>
  </head>
  <body>
    Test: \(\underset{}{\rightsquigarrow}\)
  </body>
</html>

Output:

Test: [Math Processing Error]

Backtrace:

Error: span.lastChild.firstChild is null

file: https://cdn.mathjax.org/mathjax/2.6-latest/unpacked/jax/output/PreviewHTML/jax.js?rev=2.6.1
line: 789

Workaround:

Test: \(\underset{\mbox{}}{\rightsquigarrow}\)

Let me know if I can provide more info!
@dpvc
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dpvc commented Aug 13, 2016

This is a duplicate of #1474 (which was about overset, but it is the same issue). A patch is already in place in the develop branch, and will be in the next release.

@dpvc dpvc added the Duplicate label Aug 13, 2016
@cpitclaudel
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Thanks. Sorry for missing it.

@dpvc
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dpvc commented Aug 13, 2016

No problem. Better to have two reports than none.

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@dpvc @cpitclaudel