This question already has an answer here:

In this MWE, of a math equation

\sqrt{\frac{\left(E-\frac{N_c e^d}{b}\right)}{a}}

I find that lualatex (Version beta-0.70.2-2013031016 (TeX Live 2013/dev)) produces a very strange result:


The result is however as expected with pdflatex 3.1415926-2.5-1.40.13 (TeX Live 2013/dev) and xelatex (3.1415926-2.5-0.9999-2013031016 (TeX Live 2013/dev))

The example is really minimal to reproduce the bug.

The question is: I really need to type an equation like this and I really need to use lualatex for other reasons. What is a workaround (trick with commands) or a permanent solution (e.g. load package, add something to the preamble)?

A secondary question is how one reports a bug in lualatex?, (or for any TeX program for that matter)

marked as duplicate by LaRiFaRi, user13907, Paul Gaborit, Mico math-mode Jul 19 '15 at 13:51

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 2
    use \usepackage{unicode-math} – user2478 Apr 5 '13 at 9:54
  • 1
    Not reproducable (fixed) in current version. – LaRiFaRi Jul 19 '15 at 12:58
  • The code now works in This is LuaTeX, Version beta-0.79.1 (TeX Live 2014) (rev 4971). (version in the question was Version beta-0.70.2-2013031016 (TeX Live 2013/dev)) – alfC Jul 20 '15 at 8:32



It should be fixed in the current version 0.75. See also: How to report a bug in LuaTeX?

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