For the past few months, LaTeX had been completely broken on my
computer. I’d been hoping it was something systemwide and that
upgrading LaTeX would fix it. Nope. I’d tried mitigating using
different engines. Turns out, xelatex produces different line breaks
(!!) and lualatex was somehow incompatible with acmart 1.73 on my
computer (metric data for lmroman10-regular not found). Computers are
great.
Here’s the pdflatex error message:
! LaTeX Error: File `l3backend-pdfmode.def’ not found.
