GCC build failure, HEAD@193116 on native

[GCC regression tester]

With your recent patch, GCC HEAD revision 193116 had problems on:
native: build (about the same as the previous build)
Attached is build output for those targets.
The previous build was of revision 193115.

Log information for changes since the last build:
------------------------------------------------------------------------
r193116 | redi | 2012-11-02 17:22:18 -0700 (Fri, 02 Nov 2012) | 1 line
Changed paths:
   M /trunk/libstdc++-v3/ChangeLog
   M /trunk/libstdc++-v3/doc/html/api.html
   M /trunk/libstdc++-v3/doc/html/faq.html
   M /trunk/libstdc++-v3/doc/html/index.html
   M /trunk/libstdc++-v3/doc/html/manual/abi.html
   M /trunk/libstdc++-v3/doc/html/manual/algorithms.html
   M /trunk/libstdc++-v3/doc/html/manual/api.html
   M /trunk/libstdc++-v3/doc/html/manual/appendix_contributing.html
   M /trunk/libstdc++-v3/doc/html/manual/appendix_free.html
   M /trunk/libstdc++-v3/doc/html/manual/appendix_gpl.html
   M /trunk/libstdc++-v3/doc/html/manual/appendix_porting.html
   M /trunk/libstdc++-v3/doc/html/manual/atomics.html
   M /trunk/libstdc++-v3/doc/html/manual/backwards.html
   M /trunk/libstdc++-v3/doc/html/manual/bk01pt02.html
   M /trunk/libstdc++-v3/doc/html/manual/bk01pt03ch17s03.html
   M /trunk/libstdc++-v3/doc/html/manual/bk01pt03ch18s03.html
   M /trunk/libstdc++-v3/doc/html/manual/bk01pt03ch19s02.html
   M /trunk/libstdc++-v3/doc/html/manual/bk01pt03ch19s07.html
   M /trunk/libstdc++-v3/doc/html/manual/bk01pt03ch21s02.html
   M /trunk/libstdc++-v3/doc/html/manual/bk01pt03pr01.html
   M /trunk/libstdc++-v3/doc/html/manual/concurrency.html
   M /trunk/libstdc++-v3/doc/html/manual/configure.html
   M /trunk/libstdc++-v3/doc/html/manual/containers.html
   M /trunk/libstdc++-v3/doc/html/manual/debug.html
   M /trunk/libstdc++-v3/doc/html/manual/diagnostics.html
   M /trunk/libstdc++-v3/doc/html/manual/documentation_hacking.html
   M /trunk/libstdc++-v3/doc/html/manual/extensions.html
   M /trunk/libstdc++-v3/doc/html/manual/facets.html
   M /trunk/libstdc++-v3/doc/html/manual/index.html
   M /trunk/libstdc++-v3/doc/html/manual/intro.html
   M /trunk/libstdc++-v3/doc/html/manual/io.html
   M /trunk/libstdc++-v3/doc/html/manual/iterators.html
   M /trunk/libstdc++-v3/doc/html/manual/localization.html
   M /trunk/libstdc++-v3/doc/html/manual/memory.html
   M /trunk/libstdc++-v3/doc/html/manual/numerics.html
   M /trunk/libstdc++-v3/doc/html/manual/parallel_mode.html
   M /trunk/libstdc++-v3/doc/html/manual/policy_data_structures.html
   M /trunk/libstdc++-v3/doc/html/manual/policy_data_structures_design.html
   M /trunk/libstdc++-v3/doc/html/manual/policy_data_structures_using.html
   M /trunk/libstdc++-v3/doc/html/manual/profile_mode.html
   M /trunk/libstdc++-v3/doc/html/manual/setup.html
   M /trunk/libstdc++-v3/doc/html/manual/status.html
   M /trunk/libstdc++-v3/doc/html/manual/strings.html
   M /trunk/libstdc++-v3/doc/html/manual/support.html
   M /trunk/libstdc++-v3/doc/html/manual/test.html
   M /trunk/libstdc++-v3/doc/html/manual/using.html
   M /trunk/libstdc++-v3/doc/html/manual/using_exceptions.html
   M /trunk/libstdc++-v3/doc/html/manual/using_headers.html
   M /trunk/libstdc++-v3/doc/html/manual/utilities.html

	* doc/html/*: Regenerate.
------------------------------------------------------------------------

For more information, see <http://glutton.geoffk.org/HEAD/>.

-------------- next part --------------
                 from /home/regress/tbox/svn-gcc/gcc/tree-ssa-loop-niter.c:25:
/home/regress/tbox/svn-gcc/gcc/tree-ssa-loop-niter.c: In function 'void discover_iteration_bound_by_body_walk(loop*)':
/home/regress/tbox/svn-gcc/gcc/vec.h:329:27: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
  ((V) ? (V)->length () : 0)
                           ^
/home/regress/tbox/svn-gcc/gcc/tree-ssa-loop-niter.c:3164:21: note: in expansion of macro 'VEC_length'
   if (latch_index < VEC_length (double_int, bounds))
                     ^
cc1plus: all warnings being treated as errors
make[3]: *** [tree-ssa-loop-niter.o] Error 1
make[3]: *** Waiting for unfinished jobs....
rm gcj-dbtool.pod jcf-dump.pod jv-convert.pod grmic.pod gcov.pod gcj.pod gc-analyze.pod gfdl.pod cpp.pod gfortran.pod fsf-funding.pod gij.pod gcc.pod
make[3]: Leaving directory `/home/regress/tbox/native/build/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `/home/regress/tbox/native/build'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/home/regress/tbox/native/build'
make: *** [bootstrap] Error 2
+ '[' -s .bad_compare ']'
+ exit 1
-------------- next part --------------

-- 
Geoffrey Keating <geoffk@geoffk.org> 
(via an automated GCC regression-testing script.)