Say, I have a do-catch block inside a DispatchQueue.global().async, so the block would executed on a global thread asynchronous.

func aFunc() {
    DispatchQueue.global().async {
        do {
            try self.doSomething()
        }
        catch {
            print(error)
        }
    }
}

If I remove DispatchQueue.global().async block, how will this do-catch block working?

func aFunc() {
    do {
        try self.doSomething()
    }
    catch {
        print(error)
    }
}