p.Deps = append(p.Deps, dep)
	}
	sort.Strings(p.Deps)
}

// collectDeps populates p.DepsErrors by iterating over p.Internal.Imports.
// collectDepsErrors must be called on all of p's Imports before being called on p.
func collectDepsErrors(p *load.Package) {
	depsErrors := make(map[*load.PackageError]bool)

	for _, p := range p.Internal.Imports {
		if p.Error != nil {
			depsErrors[p.Error] = true
		}