nepenthes version 0.2.2-6ubuntu1 failed to build on i386

nepenthes version 0.2.2-6ubuntu1 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2405265

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2405265/+files/buildlog_ubuntu-natty-i386.nepenthes_0.2.2-6ubuntu1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1337 lines into the build log:

if i686-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I. -I../.. -I../include -I ../.. -Wall -Werror -D _GNU_SOURCE -I/usr/local/include -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGE_FILES -g -O2 -fno-strict-aliasing -MT Config.o -MD -MP -MF ".deps/Config.Tpo" -c -o Config.o Config.cpp; \
 then mv -f ".deps/Config.Tpo" ".deps/Config.Po"; else rm -f ".deps/Config.Tpo"; exit 1; fi
cc1plus: warnings being treated as errors
Config.cpp: In member function 'virtual char* nepenthes::Config::terminateString(char*)':
Config.cpp:694:15: error: value computed is not used
make[4]: *** [Config.o] Error 1
make[4]: Leaving directory `/build/buildd/nepenthes-0.2.2/nepenthes-core/src'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/build/buildd/nepenthes-0.2.2/nepenthes-core'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/build/buildd/nepenthes-0.2.2'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/build/buildd/nepenthes-0.2.2'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110408-1602
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/nepenthes-0.2.2