Failure building Emacs PDF manual

[Angelo Graziosi]

With recent revisions (also with the current rev. 106715), building the 
Emacs manual,

  make emacs.pdf

fails in this way:

[...]
Underfull \hbox (badness 7099) in paragraph at lines 429--434
@texttt address@hidden . To dis-play any er-ror 
mes-sages as-
so-ci-ated with the
[243]
/tmp/emacs/doc/emacs/building.texi:553: This command can appear only in 
environ
ment @iftext, not outside of any environment.
@badenverr ...temp , not @inenvironment @thisenv }

@checkenv address@hidden @thisenv @temp @else @badenverr
                                                  @fi
@\end ...pandafter @checkenv @csname address@hidden
                                                  @csname address@hidden 
@end...
l.553 @end iftext

?


This happens on various systems (Cygwin, GNU/Linux Fedora14...) with 
TeXLive 2011.


Thanks,
Angelo.