我的应用程序在调试模式下通过
Xcode运行良好,但无论何时通过TestFlight下载,它都会崩溃,出现此错误：EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x000200013f7b9e78.
它在这条线上崩溃了.我在这个堆栈跟踪中看到了它可能与之相关的专门的Array.withUnsafeMutableBufferPoint.
self.array.sortInPlace. {
(($0 as Dictionary<String,AnyObject>)["time"] as? String) > (($1 as Dictionary<String,AnyObject>)["time"] as? String)
}
在Swift 1.3中我使用了sort,现在在Swift 2中我使用了sortInPlace.不确定这是否有所不同,但我确实知道sort的结果没有被调用,因为它是不可变的.
Thread : Crashed: com.apple.main-thread
0 libswiftCore.dylib 4302688056 _swift_retain_(swift::HeapObject*) + 8
1 App 4295962040 specialized LiveFeedViewController.(viewDidLoad(LiveFeedViewController) -> () -> ()).(closure #3).(closure #1) (LiveFeedViewController.swift)
2 App 4295785356 specialized thunk (LiveFeedViewController.swift)
3 App 4295953880 specialized _siftDown<A where ...> (inout A,A.Index,Range<A.Index>,inout (A.Generator.Element,A.Generator.Element) -> Bool) -> () (LiveFeedViewController.swift)
4 App 4295952448 specialized _heapSort<A where ...> (inout A,A.Generator.Element) -> Bool) -> () (LiveFeedViewController.swift)
5 App 4295938144 specialized _introSortImpl<A where ...> (inout A,A.Generator.Element) -> Bool,Int) -> () (LiveFeedViewController.swift)
6 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
7 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
8 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
9 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
10 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
11 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
12 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
13 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
14 App 4295938120 specialized _introSortImpl<A where ...> (inout A,Int) -> () (LiveFeedViewController.swift)
15 App 4295960640 specialized specialized MutableCollectionType<A where ...>.sortInPlace<A where ...>((A.Generator.Element,A.Generator.Element) -> Bool) -> () (LiveFeedViewController.swift)
16 App 4295730388 _TPA__TTSg5GSaGVSs10DictionarySSPSs9AnyObject___GSaGS_SSPS0____Ss21MutableCollectionTypeSs_GVSs17IndexingGeneratorGSaGS_SSPS0_____GS2_GSaGS_SSPS0_____Ss13GeneratorTypeSs_GS_SSPS0____SiSiSs21RandomAccessIndexTypeSs_SiSiSs18_SignedIntegerTypeSs_SiSiSs33_BuiltinIntegerLiteralConvertibleSs_SiSiSs16SignedNumberTypeSs_SiSiS6_Ss_Si_GVSs10ArraySliceGS_SSPS0____GS8_GS_SSPS0____Ss9IndexableSsGS8_GS_SSPS0____Ss12SequenceTypeSs_GS2_GS8_GS_SSPS0_____GS2_GS8_GS_SSPS0_____S3_Ss_GS_SSPS0____SiSiSs16ForwardIndexTypeSs_SiSiS5_Ss_SiSiS6_Ss_Si_GS8_GS_SSPS0_____GS_SSPS0____GS_SSPS0______TFFeRq_Ss21MutableCollectionTypeqq_Ss16MutableIndexable5IndexSs21RandomAccessIndexType_SsS_11sortInPlaceuRq_S_qq_S0_5IndexS1__FRq_FFTqqq_Ss14CollectionType9GeneratoRSS13GeneratorType7Elementqqq_S2_9GeneratorS3_7Element_SbT_U_FTGVSs20UnsafeMutablePointerQQQPS_9Generator7Element_Si_T_ (LiveFeedViewController.swift)
17 App 4295730548 _TPA__TTSg5GSaGVSs10DictionarySSPSs9AnyObject___GSaGS_SSPS0____Ss21MutableCollectionTypeSs_GVSs17IndexingGeneratorGSaGS_SSPS0_____GS2_GSaGS_SSPS0_____Ss13GeneratorTypeSs_GS_SSPS0____SiSiSs21RandomAccessIndexTypeSs_SiSiSs18_SignedIntegerTypeSs_SiSiSs33_BuiltinIntegerLiteralConvertibleSs_SiSiSs16SignedNumberTypeSs_SiSiS6_Ss_Si_GVSs10ArraySliceGS_SSPS0____GS8_GS_SSPS0____Ss9IndexableSsGS8_GS_SSPS0____Ss12SequenceTypeSs_GS2_GS8_GS_SSPS0_____GS2_GS8_GS_SSPS0_____S3_Ss_GS_SSPS0____SiSiSs16ForwardIndexTypeSs_SiSiS5_Ss_SiSiS6_Ss_Si_GS8_GS_SSPS0_____GS_SSPS0____GS_SSPS0______TTRGRq_Ss21MutableCollectionTypeqq_Ss16MutableIndexable5IndexSs21RandomAccessIndexType_XFo_dGVSs20UnsafeMutablePointerqqq_Ss14CollectionType9GeneratoRSS13GeneratorType7Element_dSi_dT_zoPSs9ErrorType__XFo_dGS2_qqq_S3_9GeneratorS4_7Element_dSi_iT_zoPS5___ (LiveFeedViewController.swift)
18 App 4295730716 _TPA__TTSg5GVSs10DictionarySSPSs9AnyObject___T____TFFSa42_withUnsafeMutableBufferPointerIfSupportedu__rFRGSaq__FzFzTGVSs20UnsafeMutablePointerq__Si_qd__GSqqd___U_FzRGVSs26UnsafeMutableBufferPointerQd___Q_ (LiveFeedViewController.swift)
19 App 4295954668 specialized Array.withUnsafeMutableBufferPointer<A><B>((inout UnsafeMutableBufferPointer<A>) throws -> B) throws -> B (LiveFeedViewController.swift)
20 App 4295959880 specialized specialized MutableCollectionType<A where ...>.sortInPlace<A where ...>((A.Generator.Element,A.Generator.Element) -> Bool) -> () (LiveFeedViewController.swift)
21 App 4295895596 LiveFeedViewController.(viewDidLoad(LiveFeedViewController) -> () -> ()).(closure #3) (LiveFeedViewController.swift:1862)
22 libdispatch.dylib 6875551464 _dispatch_call_block_and_release + 24
23 libdispatch.dylib 6875551400 _dispatch_client_callout + 16
24 libdispatch.dylib 6875573680 _dispatch_main_queue_callback_4CF + 1844
25 CoreFoundation 6518931960 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
26 CoreFoundation 6518923360 __CFRunLoopRun + 1628
27 CoreFoundation 6518066336 CFRunLoopRunSpecific + 384
28 GraphicsServices 6704955528 GSEventRunModal + 180
29 UIKit 6609391612 UIApplicationMain + 204
30 App 4296344512 main (AppDelegate.swift:23)
31 libdyld.dylib 6875752632 start + 4
更新：
这完全在Swift 2中,数组是一个字典数组,声明为var array = [[String：AnyObject]]().它是通过附加一系列字典来填充的,就像这样.
self.dict["foo"] = 0 self.dict["bar"] = "dog" self.array.append(self.dict)
我担心的是它在dispatch_group_notify中;它正在等待dispatch_group_leaves系列.这可能与它有关吗？看起来像这样：
dispatch_group_notify(group,queue) { () -> Void in
self.array.sortInPlace {
(($0["foo"] as? Int) > (($1 )["foo"] as? Int))
}
}
解决方法
我遇到了同样的问题,但它只影响了约50％的设备,只有那些运行该应用程序发布版本的设备.我的代码没有使用dispatch_group之类的东西.
在我的情况下,我使用的代码如下：
contacts.sortInPlace({ $0.name.localizedCaseInsensitiveCompare($1.name) == .OrderedAscending })
我用以下代码替换它时修复了它：
contacts = contacts.sort({ $0.name.localizedCaseInsensitiveCompare($1.name) == .OrderedAscending })
由于它只影响有限数量的用户,在低级Swift API中崩溃,并通过替换sort来修复,我相信这是Apple代码中的一个错误.
我推荐filing a bug with Apple并在此期间使用sort.
注意：您的代码与我的代码之间的另一个相似之处是使用shorthand argument names(即$0和$1).但是,即使我用命名参数替换它们,它仍然会崩溃.
更新：许多人都是experiencing the same issue on the apple forums.根据该线程,似乎修复了最新的Xcode测试版.
