$ docker run --rm --name validator-libvips-usage-ruby-vips-falsecolour-grayscale-2744 -t --mount type=bind,src=/tmp/validator-status-libvips-usage-ruby-vips-falsecolour-grayscale,dst=/validator/status validator-libvips-shared bash -lc 'set -euo pipefail
/validator/tests/_shared/install_override_debs.sh
exec /validator/tests/_shared/run_library_tests.sh "$@"' validator-testcase libvips usage-ruby-vips-falsecolour-grayscale -- bash -c 'PS4=$1; shift; set -x; source "$@"' validator-xtrace '__VALIDATOR_XTRACE__ ' /validator/tests/libvips/tests/cases/usage/usage-ruby-vips-falsecolour-grayscale.sh
no override packages found; continuing with apt originals
falsecolour low=[12.0, 0.0, 25.0] high=[174.0, 0.0, 0.0]