Re: fontification loop

[Richard Stallman]

    I've examined this a bit more, and it looks like
    fontification-functions are called over and over with the same
    argument despite the `fontified' property being t for the whole
    buffer.

Can you use the Lisp debugger to see what is calling the
fontification-functions?

The advice in etc/DEBUG for debugging infinite loops may be useful
here.  We need to find the loop that is failing to exit.