Subject: bug#32012: closed (Re: bug#32012: 27.0.50; jit-lock--run-functions broken)

From: [email-masked] (GNU bug Tracking System)
Date: Sat, 30 Jun 2018 13:53:02 +0000

Your bug report

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

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
32012: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=32012
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#32012: 27.0.50; jit-lock--run-functions broken
From: Eli Zaretskii <[email-masked]>
To: Andreas Röhler <[email-masked]>
Cc: [email-masked]
Date: Sat, 30 Jun 2018 16:52:46 +0300
List-Id: <debbugs-submit.debbugs.gnu.org>

> From: Andreas Röhler <[email-masked]>
> Date: Sat, 30 Jun 2018 15:06:23 +0200
> 
> Please close this

Thanks, done.

Subject: 27.0.50; jit-lock--run-functions broken
From: Andreas Röhler <[email-masked]>
To: [email-masked]
Date: Fri, 29 Jun 2018 22:16:55 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

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)

AFAIU caused by

jit-lock--run-functions from jit-lock.el, line 378, last line below

           (setq loose-beg (min loose-beg this-beg))
           (setq loose-end (max loose-end this-end))
           nil)))
     `(,(min tight-beg beg) ,(max tight-end end) ,loose-beg ,loose-end)))

‘min’ fails as ‘tight-beg’ is still nil, not updated from setq inside
pcase above.

GNU Emacs 27.0.50 (build 1, i686-pc-linux-gnu, GTK+ Version 3.14.5) of
  2018-05-29