ios – EXC_BAD_ACCESS KERN_INVALID_ADDRESS崩溃

2019年04月25日作者：佚名

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.

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