bug#32012: 27.0.50; jit-lock--run-functions broken

[Andreas Röhler]

On 30.06.2018 08:34, Eli Zaretskii wrote:
> > From: Andreas Röhler <andreas.roehler@online.de>
> > Date: Fri, 29 Jun 2018 22:16:55 +0200
> >
> > Running into it from ert-tests which call ‘jit-lock-fontify-now’
> >
> > When reproduced from emacs -Q in scratch-buffer:
> >
> > Debugger entered--Lisp error: (wrong-number-of-arguments (2 . 2) 0)
> >     jit-lock--run-functions()
> >     eval((jit-lock--run-functions) nil)
> >     elisp--eval-last-sexp(nil)
> >     eval-last-sexp(nil)
> >     funcall-interactively(eval-last-sexp nil)
> >     call-interactively(eval-last-sexp nil nil)
> >     command-execute(eval-last-sexp)
>
> Why did you think you can call that function tis way?

Hmm, by looking at its signature

(defun jit-lock-fontify-now (&optional start end)

Why that shouldn't work?

Coming here because when using font-lock-fontify-buffer in ert-tests, 
get a warning for interactive use only. Should use font-lock-ensure.
But font-lock-ensure isn't known from ert.

Maybe another bug?

Need with-buffer-prepared-for-jit-lock which seems not being provided by 
uncompiled font-lock.el

Thanks,
Andreas