
Fixes #2587 The concretizer falls back on using the root architecture (followed by the default system architecture) to fill in unspecified arch properties for a spec. It failed to check cases where the root could be None.
Fixes #2587 The concretizer falls back on using the root architecture (followed by the default system architecture) to fill in unspecified arch properties for a spec. It failed to check cases where the root could be None.