Re: [AUCTeX] Symbol's function definition is void: nil

[Ikumi Keita]

Hi Alad and David,

>>>>> David Kastrup <address@hidden> writes:
> Alad Wenter <address@hidden> writes:
>> 
>> I have installed AUCTeX on emacs-25.2-x86_64, emacs-25-x86_64-deps and 
>> Windows 7 using GNU ELPA. (I don't use emacs 25.3 due to a DLL issue: [1]) 
>> 
>> When trying to Generate previews, I get a "Symbol's function definition is 
>> void: nil" error. I've set the TeX engine to luatex with the TeX-engine-set 
>> command.
>> 
>> Toggling debug-on-error results in the following output: (I replaced the 
>> file names with ## in the output)
>> 
>> Debugger entered--Lisp error: (void-function nil)
>> nil(nil t)
>> apply(nil (nil t))
>> (concat (and (stringp TeX-command-pos) TeX-command-pos) (apply (function 
>> nil) args) (and (stringp TeX-command-pos) TeX-command-pos))
>> (shell-quote-argument (concat (and (stringp TeX-command-pos) 
>> TeX-command-pos) (apply (function nil) args) (and (stringp TeX-command-pos) 
>> TeX-command-pos)))
>> (lambda (&rest args) (shell-quote-argument (concat (and (stringp 
>> TeX-command-pos) TeX-command-pos) (apply (function nil) args) (and (stringp 
>> TeX-command-pos) TeX-command-pos))))(nil t)
>> apply((lambda (&rest args) (shell-quote-argument (concat (and (stringp 
>> TeX-command-pos) TeX-command-pos) (apply (function nil) args) (and (stringp 
>> TeX-command-pos) TeX-command-pos)))) (nil t))
>> TeX-command-expand("%(latex)" nil)
>> TeX-inline-preview-internal("lualatex --jobname=\"_region_\"  
>> -file-line-error   
>> \"\\nonstopmode\\nofiles\\PassOptionsToPackage{active,tightpage,auctex}{preview}\\AtBeginDocument{\\ifx\\ifPreview\\undefined\\RequirePackage[displaymath,floats,graphics,textmath,sections,footnotes]{preview}[2004/11/05]\\fi}\"
>>  \"\\input\" \"_region_.tex\"" "_region_" (TeX-region-file . "_region_") 
>> #<buffer ##.tex> ("##" "lualatex -ini -interaction=nonstopmode \"&lualatex\" 
>> \"prv_##\".ini    
>> \"\\nonstopmode\\nofiles\\PassOptionsToPackage{active,tightpage,auctex}{preview}\\AtBeginDocument{\\ifx\\ifPreview\\undefined\\RequirePackage[displaymath,floats,graphics,textmath,sections,footnotes]{preview}[2004/11/05]\\fi}\"
>>  \"\\input\" \"##.tex\"" . #<overlay from 1 to 55 in ##.tex>) "##" ((lambda 
>> nil (/ 10.2 (preview-document-pt))) (72.05673758865248 . 71.88679245283019) 
>> [nil nil nil nil]))
>> preview-generate-preview(t "_region_" "lualatex --jobname=\"_region_\"  
>> -file-line-error   
>> \"\\nonstopmode\\nofiles\\PassOptionsToPackage{active,tightpage,auctex}{preview}\\AtBeginDocument{\\ifx\\ifPreview\\undefined\\RequirePackage[displaymath,floats,graphics,textmath,sections,footnotes]{preview}[2004/11/05]\\fi}\"
>>  \"\\input\" \"_region_.tex\"")
>> preview-region(1 9393)
>> preview-at-point()
>> funcall-interactively(preview-at-point)
>> call-interactively(preview-at-point nil nil)
>> command-execute(preview-at-point)
>> 
>> My .emacs file:
>> 
>> ;; Added by Package.el.  This must come before configurations of
>> ;; installed packages.  Don't delete this line.  If you don't want it,
>> ;; just comment it out by adding a semicolon to the start of the line.
>> ;; You may delete these explanatory comments.
>> (package-initialize)
>> 
>> (put 'downcase-region 'disabled nil)
>> (put 'dired-find-alternate-file 'disabled nil)
>> (custom-set-variables
>> ;; custom-set-variables was added by Custom.
>> ;; If you edit it by hand, you could mess it up, so be careful.
>> ;; Your init file should contain only one such instance.
>> ;; If there is more than one, they won't work right.
>> '(package-selected-packages (quote (ada-mode auctex))))
>> (custom-set-faces
>> ;; custom-set-faces was added by Custom.
>> ;; If you edit it by hand, you could mess it up, so be careful.
>> ;; Your init file should contain only one such instance.
>> ;; If there is more than one, they won't work right.
>> )
>> 
>> My .emacs.d folder is empty apart from elpa, auto-save-list and a bookarks 
>> file. I have no other packages installed apart from AUCTeX. How can I 
>> troubleshoot this issue?
>> 
>> Best,
>> Alad
>> 
>> [1] 
>> http://gnu.emacs.help.narkive.com/4kg9yq1P/unable-to-run-64-bit-gnu-emacs-25-3-on-windows-7-professional-service-pack-1

> Looks to me like

> commit 370a4b92155aebf3d0860c1211617d14d8e7951c
> Author: Ikumi Keita <address@hidden>
> Date:   Fri May 26 22:29:59 2017 +0900

>     Resolve preview-latex incompatibility with Japanese TeX (Bug#25322)
> [...]

> is responsible here.  It adds the line

>                            (TeX-command-expand "%(latex)" nil)))))

> which is an invalid use of TeX-command-expand (I have no idea how this
> could have ever worked).

I'm sorry, this is my fault.  I'll make out some work around.

David, thank you for tracking down this defect.

> I have no idea what the intent of that line ever was.  "nil" probably
> needs to be some file expansion function.

The idea is that putting back the "--kanji" option dropped by the
preceding regular expression `preview-undump-replacements'.  This option
is necessary to tell the coding system of the file to the Japanese
platex command.

I should have noticed the existence of "%s" in the fourth element of the
`luatex' entry of `TeX-engine-alist-builtin'.  I faltly assumed that
this `TeX-command-expand' does not make use of its `file' argument when
its first argument is only "%(latex)".  But it is wrong for lualatex
because of that "%s".

It is rather strange that preview-latex does work for lualatex file
without error on my machine, but it's not important, of course.  Anyway,
I'll fix this issue.

Regards,
Ikumi Keita