elif [ "$1" == "--backtrace" ]; then
shift;
gdb -batch -ex "run" -ex "thread apply all bt" -return-child-result --args build/test/unit-tests --catch_system_errors=yes $*
elif [ "$1" == "--backtrace" ]; then
shift;
gdb -batch -ex "run" -ex "thread apply all bt" -return-child-result --args build/test/unit-tests --catch_system_errors=yes $*