kalzium version 4:4.7.0-0ubuntu2 failed to build in oneiric

kalzium version 4:4.7.0-0ubuntu2 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2697477

Details about the rebuild:
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20110816-oneiric.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2697477/+files/buildlog_ubuntu-oneiric-i386.kalzium_4%3A4.7.0-0ubuntu2_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1745 lines into the build log:

Linking CXX shared library ../lib/libscience.so
cd libscience && /usr/bin/cmake -E cmake_link_script CMakeFiles/science.dir/link.txt --verbose=1
/usr/bin/c++ -fPIC -g -O2 -Wnon-virtual-dtor -Wno-long-long -ansi -Wundef -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -Wformat-security -fno-exceptions -DQT_NO_EXCEPTIONS -fno-check-new -fno-common -Woverloaded-virtual -fno-threadsafe-statics -fvisibility=hidden -Werror=return-type -fvisibility-inlines-hidden -DNDEBUG -DQT_NO_DEBUG -Wl,--enable-new-dtags -Wl,--fatal-warnings -Wl,--no-undefined -lc -Wl,-Bsymbolic-functions -Wl,--as-needed -Wl,--no-undefined -Wl,--as-needed -Wl,--no-undefined -shared -Wl,-soname,libscience.so.4 -o ../lib/libscience.so.4.7.0 CMakeFiles/science.dir/science_automoc.o CMakeFiles/science.dir/element.o CMakeFiles/science.dir/spectrum.o CMakeFiles/science.dir/isotope.o CMakeFiles/science.dir/spectrumparser.o CMakeFiles/science.dir/elementparser.o CMakeFiles/science.dir/isotopeparser.o CMakeFiles/science.dir/chemicaldataobject.o CMakeFiles/science.dir/moleculeparser.o CMakeFiles/science.dir/parser.o CMakeFiles/science.dir/psetables.o /usr/lib/libkdecore.so.5.7.0 /usr/lib/i386-linux-gnu/libQtXml.so /usr/lib/libkunitconversion.so.4.7.0 /usr/lib/libkdecore.so.5.7.0 /usr/lib/i386-linux-gnu/libQtDBus.so /usr/lib/i386-linux-gnu/libQtCore.so
cd libscience && /usr/bin/cmake -E cmake_symlink_library ../lib/libscience.so.4.7.0 ../lib/libscience.so.4 ../lib/libscience.so
make[4]: Leaving directory `/build/buildd/kalzium-4.7.0/obj-i686-linux-gnu'
/usr/bin/cmake -E cmake_progress_report /build/buildd/kalzium-4.7.0/obj-i686-linux-gnu/CMakeFiles 90 91 92 93 94 95 96 97 98
[ 13%] Built target science
make[3]: Leaving directory `/build/buildd/kalzium-4.7.0/obj-i686-linux-gnu'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/build/buildd/kalzium-4.7.0/obj-i686-linux-gnu'
dh_auto_build: make -j2 returned exit code 2
make[1]: *** [pre_build_dh_auto_build] Error 2
make[1]: Leaving directory `/build/buildd/kalzium-4.7.0'
make: *** [debian/dhmk_build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110817-1101
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/kalzium-4.7.0