We have fixes ready to go for this keyed archiver issue but the inability to
get past CI has slowed us down on putting it in.
- Tony
> On Aug 9, 2016, at 12:02 PM, Joe Groff via swift-dev <swift-dev@swift.org>
> wrote:
>
>>
>> On Aug 4, 2016, at 1:21 PM, Philippe Hausler via swift-dev
>> <swift-dev@swift.org> wrote:
>>
>> With a freshly built toolchain from ToT swift, building ToT
>> swift-corelibs-foundation I am getting some very strange failures in the
>> unit tests:
>>
>> Test Suite 'TestNSKeyedArchiver' started at 13:15:01.843
>> Test Case 'TestNSKeyedArchiver.test_archive_array' started at 13:15:01.843
>> assertion failed: file
>> /Volumes/Users/phausler/Documents/Public/swift/swift-corelibs-foundation/Foundation/NSKeyedArchiver.swift,
>> line 23
>> 2016-08-04 13:15:07.650689 TestFoundation[47395:4939580] assertion failed:
>> file
>> /Volumes/Users/phausler/Documents/Public/swift/swift-corelibs-foundation/Foundation/NSKeyedArchiver.swift,
>> line 23
>> Current stack trace:
>>
>> this is being caused by the line:
>>
>> let classReference = innerDecodingContext.dict["$class"] as?
>> CFKeyedArchiverUID
>>
>> CFKeyedArchiverUID being AnyObject
>>
>> and
>>
>> class DecodingContext {
>> fileprivate var dict : Dictionary<String, Any>
>> …
>> }
>>
>> It claims a conditional cast from Any? to AnyObject always succeeds but it
>> is giving me an unexpected type later on
>>
>> Changing to:
>>
>> let classReference = innerDecodingContext.dict["$class"] as
>> CFKeyedArchiverUID?
>
> This is the same problem you raised recently on
> https://bugs.swift.org/browse/SR-2287
> <https://bugs.swift.org/browse/SR-2287>. Coercing something to AnyObject on
> Darwin will bridge it, by boxing if there is no corresponding bridged type.
> Since you're coercing an Optional, and Optional doesn't bridge, you end up
> with a boxed Optional. To work around this, you could do 'dict["$class"].map
> { $0 as AnyObject }'.
>
> -Joe
>
>>
>> Then makes the process no longer crash, however it then fails in an even
>> more strange way:
>>
>>
>> guard let root = try unarchiver.decodeTopLevelObjectOfClasses(classes,
>> forKey: NSKeyedArchiveRootObjectKey) as? NSObject else
>> {
>>
>> by expanding that out the decoded object is a NSArray (expected), but that
>> cannot be represented as an NSObject?! This isn’t Swift, this is madness!
>>
>> Perhaps there is some other failure that I am not seeing underpinning this?
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