Bug?

[jmhuffle at femto-st.fr]

Dear TeX live-rs,

I discover some strange behavior. If I compile the minimal file "hb-bof.tex" with pdflatex belonging to TeX Live 2023, I got the message
	(end occurred when ifx on line 2 was incomplete)at the process's end. If I compile with pdflatex from TeX Live 2021, this message disappears. This seems to be related to the "ltugproc" class, because if I replace it by "article", this message also disappear. But I performed a "diff" of the 2 versions of this class: only the dates are different.

All the best,

Jean-Michel Hufflen
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