Re: LaTeX/Emacs problem

[Peter Dyballa]

Am 10.01.2013 um 23:20 schrieb Fred Krogh:

> Here is an example
> 
> \documentclass{article}
> %\usepackage{hyperref}
> \begin{document}
> \Nothing to see here folks.
> \end{document}
> 
> Run latex from inside emacs and this will flag the "\Nothing" and position 
> the cursor on that line.  Remove the % at the start of the second line, 
> delete the *TeX Help buffer, do the same, and you will get "Error occured 
> after last TeX file closed" and nothing else.

Not using GNU Emacs I get in the console:

        This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012)
         restricted \write18 enabled.
        entering extended mode
        (./Krogh.tex
        LaTeX2e <2011/06/27>
        Babel <v3.8m> and hyphenation patterns for english, dumylang, 
nohyphenation, german-x-2012-05-30, ngerman-x-2012-05-30, ukenglish, 
usenglishmax, french, friulan, german, ngerman, swissgerman, romansh, loaded.
        (/usr/local/texlive/2012/texmf-dist/tex/latex/base/article.cls
        Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
        (/usr/local/texlive/2012/texmf-dist/tex/latex/base/size10.clo)) 
(./Krogh.aux)
        ! Undefined control sequence.
        l.4 \Nothing
                     to see here folks.
        ? 
        ! Emergency stop.
        l.4 \Nothing
                     to see here folks.
        !  ==> Fatal error occurred, no output PDF file produced!
        Transcript written on Krogh.log.

And this is the output from AUCTeX 11.86 from inside GNU Emacs 24.3.50:

        Running `LaTeX' on `Krogh' with ``pdflatex  -interaction=nonstopmode 
"\input" Krogh.tex''
        This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012)
         restricted \write18 enabled.
        entering extended mode
        LaTeX2e <2011/06/27>
        Babel <v3.8m> and hyphenation patterns for english, dumylang, 
nohyphenation, german-x-2012-05-30, ngerman-x-2012-05-30, ukenglish, 
usenglishmax, french, friulan, german, ngerman, swissgerman, romansh, loaded.
        (./Krogh.tex 
(/usr/local/texlive/2012/texmf-dist/tex/latex/base/article.cls
        Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
        (/usr/local/texlive/2012/texmf-dist/tex/latex/base/size10.clo)) 
(./Krogh.aux)
        ! Undefined control sequence.
        l.4 \Nothing
                     to see here folks.
        
[1{/usr/local/texlive/2012/texmf-var/fonts/map/pdftex/updmap/pdftex.map}] 
(./Krogh.aux) )
        (see the transcript file for additional 
information)</usr/local/texlive/2012/texmf-dist/fonts/type1/public/amsfonts/cm/cmr10.pfb>
        Output written on Krogh.pdf (1 page, 12041 bytes).
        Transcript written on Krogh.log.
        
        LaTeX exited abnormally with code 1 at Thu Jan 10 23:39:58

Quite similar behaviour. (I do need to update my hyphenations configuration! 
I'll never use Friulan or Rumansh!) When I then choose from AUCTeX's Commands 
menu the item "Next Error" it shows me that error and open a buffer with that 
contents:

        ERROR: Undefined control sequence.
        
        --- TeX said ---
        l.4 \Nothing
                     to see here folks.
        --- HELP ---
        TeX encountered an unknown command name. You probably misspelled the
        name. If this message occurs when a LaTeX command is being processed,
        the command is probably in the wrong place---for example, the error
        can be produced by an \item command that's not inside a list-making
        environment. The error can also be caused by a missing \documentclass
        command.

When I then remove the comment sign, save, and run LaTeX again, I get the same 
error. When I then choose the same command, AUCTeX asks me for the master file. 
When I give the correct answer, it opens *TeX Help* buffer with the same 
contents – and buries the buffer with the TeX file with an empty "TeX Live 
2012" buffer. This latter effect certainly is not needed.


When I open an empty TeX file under the control of AUCTeX, it asks me for the 
master file. I show it the master file by pressing the RETURN key. I insert 
your example and get as buffer and file contents:

        \documentclass{article}
        %\usepackage{hyperref}
        \begin{document}
        \Nothing to see here folks.
        \end{document}
        
        %%% Local Variables: 
        %%% TeX-master: t
        %%% End: 

With the commented line the behaviour is as before: OK. With the uncommented 
line, the behaviour is as before: not OK!

This is a bug in AUCTeX. It's even two bugs: why does it ask me for the master 
file? The opened file in the buffer is *obviously* the master. To report it, 
choose "Report Bug" from the Preview menu!

Similar behaviour in GNU Emacs 24.2 launched with -Q. I consider reporting mine 
tomorrow. I'll have to read the documentation to be sure that it's not me who 
is buggy.

--
Greetings

  Pete


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