bug#11842: *Compile-Log*: Don't know how to compile nil

[Marius Hofert]

Hi,

I would like to report a bug of Emacs, version:

,----[ M-x version ]
| GNU Emacs 24.1.50.1 (x86_64-pc-linux-gnu, GTK+ Version 3.4.2) of 2012-07-01 
on rhenium, modified by Debian
`----

Whenever I open a .tex file (LaTeX), a buffer named "*Compile-Log*" pops up,
containing "Error: Don't know how to compile nil". This error message is
appended to *Compile-Log* each time I open a .tex document. It seems that this
bug is related to AUCTeX. The only thing I found is:

,----
| 
http://old.nabble.com/bug-11837%3A-24.1.50--*Compile-Log*-Error%3A-Don%27t-know-how-to-compile-nil-td34099807.html
`----

which means that I am not alone. Hopefully, it is not too difficult to fix, it's
quite annoying.

Cheers,

Marius