2.17.13 fails to build with texinfo 5.0 installed (texinfo 4.13 works)

[Hanspeter Niederstrasser]

When texinfo 5.0 is installed, the build fails with this error:

****
/sw/build.build/lilypond-devel-2.17.13-1/lilypond-2.17.13/scripts/build/out/
run-and-check "LANG= makeinfo --enable-encoding --error-limit=0 -I /sw/build.
build/lilypond-devel-2.17.13-1/lilypond-2.17.13/Documentation -I. -I./out --
output=out/lilypond-usage.info out/usage.texi"  "usage.makeinfo.log"

Please check the logfile usage.makeinfo.log for errors
****

Documentation/usage.makeinfo.log contains the following:
***START***
out/common-macros.texi:190: warning: @end ifset should only appear at a line 
beginning
out/usage/running.texi:31: warning: @vindex should only appear at a line 
beginning (possibly involving @rlearning)
out/usage/running.texi:48: warning: @vindex should only appear at a line 
beginning (possibly involving @rweb)
out/usage/running.texi:952: warning: @vindex should only appear at a line 
beginning (possibly involving @ruser)
out/usage/running.texi:956: warning: @vindex should only appear at a line 
beginning (possibly involving @ruser)
out/usage/running.texi:1125: warning: @vindex should only appear at a line 
beginning (possibly involving @ruser)
out/usage/lilypond-book.texi:32: warning: @vindex should only appear at a 
line beginning (possibly involving @rweb)
out/usage/lilypond-book.texi:32: warning: @vindex should only appear at a 
line beginning (possibly involving @rweb)
out/usage/lilypond-book.texi:1177: @itemx must follow @item
out/usage/lilypond-book.texi:1181: @itemx must follow @item
out/usage/lilypond-book.texi:1185: @itemx must follow @item
out/usage/lilypond-book.texi:1190: @itemx must follow @item
out/usage/lilypond-book.texi:1199: @itemx must follow @item
out/usage/lilypond-book.texi:1203: @itemx must follow @item
out/usage/lilypond-book.texi:1208: @itemx must follow @item
out/usage/lilypond-book.texi:1231: @itemx must follow @item
out/usage/external.texi:274: warning: @vindex should only appear at a line 
beginning (possibly involving @rweb)
out/usage/external.texi:323: warning: @vindex should only appear at a line 
beginning (possibly involving @rinternals)
out/usage/external.texi:324: warning: @vindex should only appear at a line 
beginning (possibly involving @rinternals)
out/usage/external.texi:587: warning: @vindex should only appear at a line 
beginning (possibly involving @rweb)
out/usage/external.texi:607: warning: @vindex should only appear at a line 
beginning (possibly involving @ruser)
out/usage/suggestions.texi:68: warning: @vindex should only appear at a line 
beginning (possibly involving @ruser)
out/usage/suggestions.texi:119: warning: @vindex should only appear at a line 
beginning (possibly involving @ruser)
***END***

As mentioned in the summary, if texinfo is downgraded to 4.13, the build
succeeds.  Issues 1000 and 1557 are possibly related but they deal with
texi2html 5.0 and not texinfo.

Other possibly relevant software installed:

texi2html: 1.82
dblatex: 0.2.12
texlive: 20110705