Todd Gamblin 71726a9b33 concretizer bugfix: require at least one value for multi-value variants ...

We didn't have a cardinality constraint for multi-valued variants, so the
solver wasn't filling them in.

- [x] add a requirement for at least one value for multi-valued variants

2020-11-17 10:04:13 -08:00

..

spack

concretizer bugfix: require at least one value for multi-value variants

2020-11-17 10:04:13 -08:00