[luatex] Fatal error with attr keyword to \hbox or \vbox

Esger Renkema esgerrenkema at gmail.com
Wed Oct 7 11:00:15 CEST 2020

> Which format are you using ? plain ?

Yes, plain. You should append a \bye to both examples, I guess.

Of course, the problem disappears when using luaotfload, which must be why no
one has run into this bug before.

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