dunecontrol fails with non existing directory

If DUNE_CONTROL_PATH contains a non existing directory dunecontrol fails. Can be tested by running DUNE_CONTROL_PATH="doesntexist" dune-common/bin/dunecontrol (except if 'doesntexist' exists on your system). Leads to

doesntexist: file not found
Execution of dunecontrol terminated due to errors!

I had expected this to simply ignore the non existing path?