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

Esger Renkema post at elrenkema.nl
Wed Oct 7 10:53:22 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.

More information about the luatex mailing list.