An unresolved %{path} config reference (CASC.md §7.3). Lazy --
resolved by Cooper.Resolver only after Cooper.Merge has run,
against the fully merged final tree; cycle detection happens there
too.
An unresolved %{path} config reference (CASC.md §7.3). Lazy --
resolved by Cooper.Resolver only after Cooper.Merge has run,
against the fully merged final tree; cycle detection happens there
too.