Re: Fontification error backtrace [Was: Why is it so difficult to get a Lisp backtrace?]

[Stefan Monnier]

>> BTW, in order to debug fontification errors, we also have
>> `jit-locak-debug-mode` which postpones the jit/font-lock execution from
>> within redisplay to "just a bit later" such that it can use the
>> debugger.  IIRC it still has some rough edges in some cases, but in
>> theory it should be possible to make this work such that you can (for
>> example) Edebug `font-lock.el` itself.
>
> It would be nice to have this documented in the ELisp manual.  I can
> easily add the jit-lock-debug-mode variable there, but from what you
> write, there seems to be more wisdom to go with its usage.

No, there's no extra wisdom.  It's just that it hasn't been used much,
so it probably needs refinement.  Bug reports would be quite welcome to
figure out what needs to be improved.


        Stefan