I can confirm that, because the attached minimalist test file seems to be font-locked correctly :-) Best, /PA On Wed, 28 Sept 2022 at 12:54, Lars Ingebrigtsen wrote: > (Please keep the debbugs address in the CCs -- otherwise it won't reach > the bug tracker.) > > Pedro Andres Aranda Gutierrez writes: > > > Test methodolgy: > > > > 1. curl -OL https://gutenberg.org/files/34811/34811-h.zip > > 2. emacs -Q 34811-h.zip > > 3. select the htm file in the archive > > 4. look for 'ook' > > That was a huge file, but I've narrowed it down to a more realistic test > case; included below. > > It seems to be triggered when there's a