crash in JSONWarehouse during JSON Write

[alexwald]

I have the following nested model:

    let id: String
    let agencyId: String
    let name: String
    var checklistItems: [ChecklistItem]

    init (id: String, agencyId: String, name: String, checklistItems: [ChecklistItem]) {
        self.id = id
        self.agencyId = agencyId
        self.name = name
        self.checklistItems = checklistItems
    }

    init(unboxer: Unboxer) throws {
        id = unboxer.unbox(key: "id") ?? ""
        agencyId = unboxer.unbox(key: "agencyId") ?? ""
        name = unboxer.unbox(key: "name") ?? ""
        checklistItems = unboxer.unbox(key: "checklistItems") ?? []
    }
}

extension Checklist: Storable {
    init(warehouse: Warehouseable) {
        self.id = warehouse.get("id") ?? ""
        self.agencyId = warehouse.get("agencyId") ?? ""
        self.name = warehouse.get("name") ?? ""
        self.checklistItems = warehouse.get("checklistItems") ?? [ChecklistItem]()
    }

    func toDictionary() -> [String : Any] {
        return [ "id": self.id, "agencyId": self.agencyId, "name": self.name, "checklistItems": self.checklistItems ]
    }
}

struct ChecklistItem: Unboxable {
    let id: String
    let checklistId: String
    let title: String
    var checked: Bool = false

    init(id: String, checklistId: String, title: String, checked: Bool) {
        self.id = id
        self.checklistId = checklistId
        self.title = title
        self.checked = checked
    }

    init(unboxer: Unboxer) throws {
        id = unboxer.unbox(key: "id") ?? ""
        checklistId = unboxer.unbox(key: "checklistId") ?? ""
        title = unboxer.unbox(key: "title") ?? ""
    }
}

extension ChecklistItem: Storable {
    init(warehouse: Warehouseable) {
        self.id = warehouse.get("id") ?? ""
        self.checklistId = warehouse.get("checklistId") ?? ""
        self.title = warehouse.get("title") ?? ""
        checked = warehouse.get("checked") ?? false
    }

    func toDictionary() -> [String : Any] {
        return [ "id": self.id, "checklistId": self.checklistId, "title": self.title, "checked": self.checked ]
    }
}

checklist.toDictionary() produces the following:

["agencyId": "00000000-0000-0000-0000-000000000001", "id": "00000000-0000-0000-0000-000000000001", "checklistItems": [vacatuner.ChecklistItem(id: "00000000-0000-0000-0000-000000000006", checklistId: "00000000-0000-0000-0000-000000000001", title: "Opaľovací krém", checked: false), vacatuner.ChecklistItem(id: "00000000-0000-0000-0000-000000000005", checklistId: "00000000-0000-0000-0000-000000000001", title: "Slnečné okuliare", checked: false), vacatuner.ChecklistItem(id: "00000000-0000-0000-0000-000000000004", checklistId: "00000000-0000-0000-0000-000000000001", title: "Plavky", checked: false), vacatuner.ChecklistItem(id: "00000000-0000-0000-0000-000000000003", checklistId: "00000000-0000-0000-0000-000000000001", title: "Teplé oblečenie na večer", checked: false), vacatuner.ChecklistItem(id: "00000000-0000-0000-0000-000000000002", checklistId: "00000000-0000-0000-0000-000000000001", title: "Lieky", checked: false), vacatuner.ChecklistItem(id: "00000000-0000-0000-0000-000000000001", checklistId: "00000000-0000-0000-0000-000000000001", title: "Pas", checked: true)], "name": "Europa"]

when I call Pantry.pack() on the checklist instance, I stumble upon a crash in JSONWarehouse.swift:

let data = try JSONSerialization.data(withJSONObject: storableDictionary, options: .prettyPrinted)

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (_SwiftValue)'

[monday8am]

the same is happening to me.

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (__NSTaggedDate)'

seems to be that a struct containing a Date can't be "packed". My temporal solution is to "pack" an intermediary storage type and not the serialized struct.

[niazoff]

Same with me. No clue what to do.

[reinaldoluckman]

Different data type (a business class that I have), same error.

[rickvdl]

Also happening to me. Log:

2017-03-20 10:14:23.075 GLURooster[10782:3990895] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (_SwiftValue)'
*** First throw call stack:
(
	0   CoreFoundation                      0x000000010498bd4b __exceptionPreprocess + 171
	1   libobjc.A.dylib                     0x0000000103fd321e objc_exception_throw + 48
	2   CoreFoundation                      0x00000001049f52b5 +[NSException raise:format:] + 197
	3   Foundation                          0x0000000101e7b964 _writeJSONValue + 668
	4   Foundation                          0x0000000101e7bdb9 ___writeJSONArray_block_invoke + 132
	5   CoreFoundation                      0x00000001049317bf __NSArrayEnumerate + 607
	6   Foundation                          0x0000000101e7babf _writeJSONArray + 330
	7   Foundation                          0x0000000101e7b8e4 _writeJSONValue + 540
	8   Foundation                          0x0000000101ed1232 ___writeJSONObject_block_invoke + 226
	9   CoreFoundation                      0x0000000104912b5c __NSDictionaryEnumerate + 828
	10  Foundation                          0x0000000101ed1026 _writeJSONObject + 430
	11  Foundation                          0x0000000101e7b84d _writeJSONValue + 389
	12  Foundation                          0x0000000101e7bdb9 ___writeJSONArray_block_invoke + 132
	13  CoreFoundation                      0x00000001049317bf __NSArrayEnumerate + 607
	14  Foundation                          0x0000000101e7babf _writeJSONArray + 330
	15  Foundation                          0x0000000101e7b8e4 _writeJSONValue + 540
	16  Foundation                          0x0000000101ed1232 ___writeJSONObject_block_invoke + 226
	17  CoreFoundation                      0x0000000104912b5c __NSDictionaryEnumerate + 828
	18  Foundation                          0x0000000101ed1026 _writeJSONObject + 430
	19  Foundation                          0x0000000101e7b84d _writeJSONValue + 389
	20  Foundation                          0x0000000101e7b674 -[_NSJSONWriter dataWithRootObject:options:error:] + 124
	21  Foundation                          0x0000000101e7b554 +[NSJSONSerialization dataWithJSONObject:options:error:] + 333
	22  Pantry                              0x0000000101ba3dd6 _TFC6Pantry13JSONWarehouse5writefTP_7expiresOS_13StorageExpiry_T_ + 838
	23  Pantry                              0x0000000101ba70a1 _TTWC6Pantry13JSONWarehouseS_18WarehouseCacheableS_FS1_5writefTP_7expiresOS_13StorageExpiry_T_ + 81
	24  Pantry                              0x0000000101baeb7b _TZFC6Pantry6Pantry4packuRxS_8StorablerfTGSax_3keySS7expiresOS_13StorageExpiry_T_ + 875
	25  GLURooster                          0x00000001016de56e _TFFC10GLURooster18WeekDataController9fetchDataFT9onSuccessFT_T_9onFailureFSST__T_U_FGSaV20GLURoosterAPIService3Day_T_ + 814
	26  GLURooster                          0x00000001016de9f1 _TPA__TFFC10GLURooster18WeekDataController9fetchDataFT9onSuccessFT_T_9onFailureFSST__T_U_FGSaV20GLURoosterAPIService3Day_T_ + 401
	27  GLURoosterAPIService                0x0000000101e28248 _TFFC20GLURoosterAPIService10APIManager9fetchWeekFT10studentSetVS_10StudentSet10weekNumberGSqSi_9onSuccessFGSaVS_3Day_T_9onFailureFSST__T_U_FV10SwiftyJSON4JSONT_ + 2328
	28  GLURoosterAPIService                0x0000000101e258c1 _TFFC20GLURoosterAPIService10APIManagerP33_0095CE809C71AEE38784D01EBF466CCF3GETFTSS10parametersGSqGVs10DictionarySSSS__9onSuccessFV10SwiftyJSON4JSONT_9onFailureFSST__T_U_FTGSqV10Foundation4Data_GSqCSo11URLResponse_GSqPs5Error___T_ + 1505
	29  GLURoosterAPIService                0x0000000101e2885c _TPA__TFFC20GLURoosterAPIService10APIManagerP33_0095CE809C71AEE38784D01EBF466CCF3GETFTSS10parametersGSqGVs10DictionarySSSS__9onSuccessFV10SwiftyJSON4JSONT_9onFailureFSST__T_U_FTGSqV10Foundation4Data_GSqCSo11URLResponse_GSqPs5Error___T_ + 124
	30  GLURoosterAPIService                0x0000000101e25dbb _TTRXFo_oGSqV10Foundation4Data_oGSqCSo11URLResponse_oGSqPs5Error____XFdCb_dGSqCSo6NSData_dGSqS1__dGSqCSo7NSError___ + 203
	31  CFNetwork                           0x0000000106e4fccc __75-[__NSURLSessionLocal taskForClass:request:uploadFile:bodyData:completion:]_block_invoke + 19
	32  CFNetwork                           0x0000000106e4f578 __49-[__NSCFLocalSessionTask _task_onqueue_didFinish]_block_invoke + 308
	33  Foundation                          0x0000000101e8b9ad __NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK__ + 7
	34  Foundation                          0x0000000101e8b68f -[NSBlockOperation main] + 101
	35  Foundation                          0x0000000101e89d8c -[__NSOperationInternal _start:] + 672
	36  Foundation                          0x0000000101e85ccf __NSOQSchedule_f + 201
	37  libdispatch.dylib                   0x000000010616b0cd _dispatch_client_callout + 8
	38  libdispatch.dylib                   0x0000000106148e17 _dispatch_queue_serial_drain + 236
	39  libdispatch.dylib                   0x0000000106149b4b _dispatch_queue_invoke + 1073
	40  libdispatch.dylib                   0x000000010614c385 _dispatch_root_queue_drain + 720
	41  libdispatch.dylib                   0x000000010614c059 _dispatch_worker_thread3 + 123
	42  libsystem_pthread.dylib             0x000000010651a712 _pthread_wqthread + 1299
	43  libsystem_pthread.dylib             0x000000010651a1ed start_wqthread + 13
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) 

[ivanmkc]

Same. Any updates on this?

[nickoneill]

Nope, definitely no time to work on this coming up. I expect there will be no more updates as Swift 4 will provide native de/serialization when it's released.