The change in #3466 introduced a problem when there is no identity constructor for the constraints' vectors. This is for instance the case for SingleEntryVector. I am not sure we want this constructor, but this case should be caught earlier anyway with the new methods added here.
The change in #3466 introduced a problem when there is no identity constructor for the constraints' vectors. This is for instance the case for
SingleEntryVector. I am not sure we want this constructor, but this case should be caught earlier anyway with the new methods added here.