Early return when module aliases are not defined (#4193)
Early return when module aliases are not defined (#4193)

Early return when module aliases are not defined
Move stack push out of a nested loop
Resolves rdar://89776259
abertelrud/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager