Run the CI `build-ubsan`. mkdir -p buildcmake && cd buildcmake
cmake -GNinja .. -DCMAKE_C_COMPILER=clang-7 -DCMAKE_CXX_COMPILER=clang++-7 -DCMAKE_BUILD_TYPE=Debug -DENABLE_SANITIZERS=undefined
ninja
export UBSAN_OPTIONS="suppressions=../sanitizer_suppressions/ubsan:print_stacktrace=1:halt_on_error=1"
ninja check