swift - KVO - change.newValue and change.oldValue are nil

Question

I\'m using the new KeyValue Observing. I\'m getting a call to my observer when the variable changes, but the change struct comes with newValue and

Answer 1

This is a Swift bug which has been reported as https://bugs.swift.org/browse/SR-5872. A pull request which addresses this issue is being discussed on https://github.com/apple/swift/pull/20757 but is not yet merged as of October 2020.