Created attachment 705327 [details]
Patrice's patch.

Using texinfo-5.0-2.fc19.x86_64

When building the manual for the pp3 package, the call to makeinfo fails with the following message:

$ makeinfo --html --enable-encoding --no-split  pp3.texi
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LANG = "en"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
You found a bug: context rawpreformatted instead of line or def

Additional informations:
last location: pp3.texi:537
context_stack: (_root rawpreformatted rawpreformatted line rawpreformatted)
current: (misc_line_arg) :   contents(3)
 <- @cindex
Died at /usr/share/texinfo/Texinfo/Parser.pm line 1667.


Steps to Reproduce:
1. Install texinfo-5.0-2.fc19.x86_64
2. Create a "test.texi" file containing, on a single line:
@cindex @tex
3. Run "makeinfo --html --enable-encoding --no-split  test.texi"

This works fine with Texinfo 4, of course.

I have discussed this upstream: http://lists.gnu.org/archive/html/help-texinfo/2013-03/msg00001.html

And it appears that it is a bug in texinfo. I have attached a patch to fix the problem written by Patrice Dumas (pertusus). It has already been committed by Patrice in upstream's SVN r5220: http://svn.savannah.gnu.org/viewvc/trunk/tp/Texinfo/Parser.pm?root=texinfo&r1=5220&r2=5219&pathrev=5220