Unsafe local variable in eglot.el

[Eli Zaretskii <eliz@gnu.org>]

João,

This recent change:

  commit 0a4b1c0102d4062d24e19340f863b9df25e07ab3
  Author:     Joao Távora <joaotavora@gmail.com>
  AuthorDate: Wed Mar 1 13:24:07 2023 +0000
  Commit:     Joao Távora <joaotavora@gmail.com>
  CommitDate: Wed Mar 1 13:27:06 2023 +0000

      ; Eglot: improve bug-reference-url-format/bug-reference-url-regexp

      * lisp/progmodes/eglot.el (eglot--debbugs-or-github-bug-uri): New helper.

causes trouble when visiting eglot.el.

First, this pops up the "variable may not be safe" buffer about the
variable bug-reference-url-format, even if I use Emacs 29, let alone
if I use older Emacs versions.

And second, if I say "y" to the "apply unsafe variable" prompt, then
with the following jit-lock settings:

  (setq jit-lock-stealth-time 16)
  (setq jit-lock-stealth-nice 0.5)
  (setq jit-lock-stealth-verbose t)
  (setq jit-lock-defer-contextually t)
  (setq jit-lock-stealth-load 20)

I get an error from jit-lock-stealth's timer:

  Error running timer ‘jit-lock-stealth-fontify’: (void-function eglot--debbugs-or-github-bug-uri)

The only way of avoiding these two issues is to say "n" to the prompt
asking whether to apply the variable, but that's not really a good
workaround, is it?

Can these problems be solved, please, preferably in a way that older
Emacsen will also be happy (since Eglot is an ELPA package)?