> c++: fatal error: Killed signal terminated program cc1plus The full build log is available from: http://qa-logs.debian.net/2025/04/16/openvdb_10.0.1-2.3_testing-arm64.log
This doesn't looks like an FTBFS to me - more like the build machine ran out of memory. openvdb requires a serious amount of RAM to compile, even when the number of parallel processes is limited (as is done in debian/rules). Could you try rerunning the QA build on a machine with more guaranteed memory available?