The parser has, but not the HTML renderer indeed. Using a third-party lib for that currently, but noticed the limitations too. Might replace it with my own!

Great! Next step: torturetest.vt

There is https://github.com/webpro/ANSI.tools/blob/main/packages/pars... and others

I was thinking of <http://artscene.textfiles.com/vt100/torturet.vt>.

The lexer and parser handled it perfectly first try. The HTML renderer had a few issues though, but it's being rendered reasonably well now. The torture test has been added to the package tests and to the website as an example.

Does it crash the tester?

https://invisible-island.net/ncurses/tctest.htm

There is some recovery in the lexer, but would love to learn what would make it crash! The url you provide gives a 404.

  s/htm/html/

I.e. <https://invisible-island.net/ncurses/tctest.html>

Blinking text?

You do not know me, but believe me, I have a special skills that I have developed for many years to deal with people like you. And if I find you I will CREOL you.

Bring it on. I’ll feed you your own form, you insignificant NUL character.