bug#11837: 24.1.50; *Compile-Log* Error: Don't know how to compile nil

[Glenn Morris]

Summary:

This is a long-standing font-latex.el bug, it just happens that Emacs is
no longer silently ignoring it. Updating your font-latex will make it go
away.

http://cvs.savannah.gnu.org/viewvc/auctex/auctex/font-latex.el?r1=5.193&r2=5.194

Tassilo Horn wrote:

> Good catch.  I've fixed that in AUCTeX CVS.  I think, it's time for a
> new AUCTeX release.  11.86 is already 4 years old...