Code does not compile in iOS 8 Beta 3.

[fabriciomrtnz]

The following line is returning an error:
if let breadcrumb = userInfo["JSONErrorBreadCrumbKey"] as? String{

Error:
'String' is not a subtype of '(NSObject, AnyObject)'

[eklipse2k8]

Interesting, the error goes away if I conditionally cast it to NSString.

    if let userInfo = error.userInfo{
        if let breadcrumb = userInfo["JSONErrorBreadCrumbKey"] as? NSString{
            let newBreadCrumb = (breadcrumb as String) + "/\(index)"
            let newUserInfo = [NSLocalizedDescriptionKey: "JSON Keypath Error: Incorrect Keypath \"\(newBreadCrumb)\"",
                               "JSONErrorBreadCrumbKey": newBreadCrumb]
            return JSONValue.JInvalid(NSError(domain: "JSONErrorDomain", code: 1002, userInfo: newUserInfo))
        }
    }

[fabriciomrtnz]

Thats the first thing I tried BUT I got the following error:
'NSString' is not convertible to 'UInt8'

By the way I just copied the swift code into a swift file in one of my projects to play around...

[eklipse2k8]

@fabriciomrtnz make sure to recast breadcrumb as String to get the + operator support.

[fabriciomrtnz]

Yep that did the trick. Its compiling, let see if it works.

-Thanks Matt

[ElHacker]

I had the same problem. Changing String to NSStringsolved the issue. Thanks :)

[ghost]

worked for me as well in Xcode 6 Beta 3