This is an epel package but I thought that I would ask here first. I
am encountering unexpected behaviour from this program and I would like to know if it is a bug, or I am configuring something wrong, of if this is intended behaviour.

ldns-dane version 1.6.16 (ldns version 1.6.16)

When I attempt to specify the entire certificate as the desired data source for this program I get the following error:

ldns-dane \
-n -o 0 \
-c CA_HLL_ROOT_2016.pem \
create harte-lyne.ca 443 \
2 0 2
should be in range [0-1]

Likewise I cannot specify the output format as no-hash.

ldns-dane \
-n -o 0 \
-c CA_HLL_ROOT_2016.pem \
create harte-lyne.ca 443 \
2 1 0
should be in range [0-2]

In fact, 0 is not an accepted value in any of these positions:

ldns-dane \
-n -o 0 \
-c CA_HLL_ROOT_2016.pem \
create harte-lyne.ca 443 \
0 1 1
should be in range [0-3]

Why is zero invalid?