[tex-live] recent texlive 2015 update causes unicode-math error

Greg' Ar Tourter artourter at gmail.com
Mon Jul 27 17:31:37 CEST 2015

Hi, not entirely sure where the problem lies, but one of the last two
series of updates causes unicode-math to crash.
I suspect it will either be in fontspec or the l3kernel:

\setmathfont{Xits Math}

stops with the error

! Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
l.3 \setmathfont{Xits Math}

this is the case with both lualatex and xelatex.

not specifying the mathfont doesn't seem to cause the error, but using
\setmathfont with either Xits Math or Tex Gyre Pagella Math cause the error.


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