[luatex] Error with TL Pretest: "This can't happen (add_disc_widths)."

[Scott Kostyshak]

The following MWE compiles with lualatex on TeX Live 2014 but not on
TeX Live 2015 pretest (installed on Ubuntu with install-tl-ubuntu
--pretest):

\documentclass{hollywood}
\usepackage[T1]{fontenc}
\begin{document}

Testing ----------

\end{document}

I get the following error:

! This can't happen (add_disc_widths).
l.6

I'm broken. Please show this to someone who can fix can fix

Attached is my log from running lualatex from the TL pretest on the
example pasted above.

Is anyone able to reproduce the error?

Please let me know if I should report this somewhere else or if there
are any other details I can provide.

Best,

Scott
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