That error was produced while building pixie 2.2.1-1ubuntu1 on the Ubuntu build machine iridium (https://launchpad.net/+builds/iridium). Here you can find the complete build log. http://launchpadlibrarian.net/11439976/buildlog_ubuntu-hardy-i386.pixie_2.2.1-1ubuntu1_FAILEDTOBUILD.txt.gz
-- Summary: i486-linux-gnu-g++: Internal error: Killed (program cc1plus) Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mariobonino at ubuntu-it dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34983