bug#43037: Eval error in the ‘c-lang-defvar’ or ‘c-lang-setvar’

[Lars Ingebrigtsen]

AC <achirvasub@gmail.com> writes:

> I compile emacs off the emacs-27 branch. On those machines, opening
> certain file types results in the above error.
>
> For .js files for instance, the full error is 
>
> Eval error in the ‘c-lang-defvar’ or ‘c-lang-setvar’ for
> ‘font-lock-comment-end-skip’ (fallback source eval - js-mode compiled
> with CC Mode 5.34 but loaded with 5.34.1): (error
> "‘c-font-lock-comment-end-skip’ got no (prior) value in js-mode (might
> be a cyclic reference)")

(This bug report unfortunately got no attention at the time.)

I'm unable to reproduce this bug in Emacs 27 or Emacs 28.  Do you have a
recipe for reproducing this bug, starting from "emacs -Q"?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no