Simultaneous accesses to 0x1c0a7f0f8, but modification requires exclusive access error on Xcode 9 beta 4

Question

my project uses both Objective-C and Swift code. When a user logs in, it calls a set of apis for user preference, I have a DataCoordinator.swift class which schedules the AP

Answer 1

Swift 5 here. I was calling a function from a property didSet and testing another property from the same object and I got this error.

I fixed it by calling my function from within another thread:

DispatchQueue.global(qos: .userInitiated).async {
    // do something
}

Basic fix but it works.