DESERIALIZATION FAILURE when compiling as Swift 3.2, with library built as Swift 4.0

Originator:alejandro.isaza
Number:rdar://33384961 Date Originated:July 18 2017
Status: Resolved:
Product:Developer Tools Product Version:9b3
Classification: Reproducible:
 
import a module compiled with Swift 4.0 in a Swift 3.2 project file with this code

class CommentCollectionViewCell: UICollectionViewCell {
    static let padding: CGFloat = 15
    // ...
}

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