GNU bug report logs - #32012
27.0.50; jit-lock--run-functions broken

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Andreas Röhler <andreas.roehler <at> online.de>
Subject: bug#32012: closed (Re: bug#32012: 27.0.50; jit-lock--run-functions
 broken)
Date: Sat, 30 Jun 2018 13:53:02 +0000

[Message part 1 (text/plain, inline)]

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 32012 <at> debbugs.gnu.org.

-- 
32012: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=32012
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
Cc: 32012-done <at> debbugs.gnu.org
Subject: Re: bug#32012: 27.0.50; jit-lock--run-functions broken
Date: Sat, 30 Jun 2018 16:52:46 +0300

> From: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
> Date: Sat, 30 Jun 2018 15:06:23 +0200
> 
> Please close this

Thanks, done.

[Message part 3 (message/rfc822, inline)]

From: Andreas Röhler <andreas.roehler <at> online.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; jit-lock--run-functions broken
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)

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

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