iphone - 核心数据崩溃 - 设备上罕见的错误

Question

我在查询托管对象数组时收到了此崩溃日志，但是，在模拟器中运行时它不会发生。即使在设备中，有时会发生，有时不会。有人可以向我解释为什么以及错误是什么？

Incident Identifier: 0ED2BB7C-5E8F-483B-AE08-8DE2C14D0C23
CrashReporter Key:   e24b9614a897f92ee13ce00b76c71db307c61dcb
Process:         FooApp [4141]
Path:            /var/mobile/Applications/8C745160-4129-4369-B201-F55CC42D0466/FooApp.app/FooApp
Identifier:      FooApp
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2010-06-19 20:57:31.548 +0200
OS Version:      iPhone OS 3.1.3 (7E18)
Report Version:  104

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000, 0x00000000
Crashed Thread:  0

Thread 0 Crashed:
0   libSystem.B.dylib               0x00090b2c __kill + 8
1   libSystem.B.dylib               0x00090b1a kill + 4
2   libSystem.B.dylib               0x00090b0e raise + 10
3   libSystem.B.dylib               0x000a7e34 abort + 36
4   libstdc++.6.dylib               0x00066390 __gnu_cxx::__verbose_terminate_handler() + 588
5   libobjc.A.dylib                 0x00008898 _objc_terminate + 160
6   libstdc++.6.dylib               0x00063a84 __cxxabiv1::__terminate(void (*)()) + 76
7   libstdc++.6.dylib               0x00063afc std::terminate() + 16
8   libstdc++.6.dylib               0x00063bb0 __cxa_rethrow + 108
9   libobjc.A.dylib                 0x000087c4 objc_exception_rethrow + 8
10  CoreData                        0x0002725e _PFFaultHandlerLookupRow + 1338
11  CoreData                        0x00026d1a -[NSFaultHandler fulfillFault:withContext:] + 14
12  CoreData                        0x00024f8a _PF_FulfillDeferredFault + 354
13  CoreData                        0x0002864c _sharedIMPL_pvfk_core + 48
14  CoreData                        0x00036314 _pvfk_9 + 4
15  FooApp                          0x00004162 -[PNHFeedDataSource tableViewDidLoadModel:] (PNHFeedDataSource.m:47)
16  FooApp                          0x00055244 -[TTTableViewController didLoadModel:] (TTTableViewController.m:395)
17  FooApp                          0x000395fc -[TTModelViewController updateViewStates] (TTModelViewController.m:98)
18  FooApp                          0x00038dce -[TTModelViewController updateView] (TTModelViewController.m:467)
19  FooApp                          0x00039510 -[TTModelViewController viewWillAppear:] (TTModelViewController.m:185)
20  FooApp                          0x000554b2 -[TTTableViewController viewWillAppear:] (TTTableViewController.m:252)
21  UIKit                           0x00088808 -[UINavigationController _startTransition:fromViewController:toViewController:] + 964
22  UIKit                           0x000883a8 -[UINavigationController _startDeferredTransitionIfNeeded] + 256
23  UIKit                           0x000ca130 -[UINavigationController _popViewControllerWithTransition:allowPoppingLast:] + 400
24  UIKit                           0x000c9f90 -[UINavigationController popViewControllerAnimated:] + 32
25  FooApp                          0x0005fc02 -[UINavigationController(TTCategory) popViewControllerAnimated2:] (UINavigationControllerAdditions.m:84)
26  UIKit                           0x000ca500 -[UINavigationController navigationBar:shouldPopItem:] + 132
27  UIKit                           0x00152ba8 -[UINavigationBar _popNavigationItemWithTransition:] + 104
28  UIKit                           0x000ca454 -[UINavigationBar popNavigationItemAnimated:] + 116
29  UIKit                           0x000ee188 -[UINavigationBar _handleMouseUpAtPoint:] + 536
30  UIKit                           0x000edf54 -[UINavigationBar touchesEnded:withEvent:] + 84
31  UIKit                           0x0005a8f8 -[UIWindow _sendTouchesForEvent:] + 520
32  UIKit                           0x00059f8c -[UIWindow sendEvent:] + 108
33  UIKit                           0x00055788 -[UIApplication sendEvent:] + 400
34  UIKit                           0x0005508c _UIApplicationHandleEvent + 4528
35  GraphicsServices                0x000057dc PurpleEventCallback + 1044
36  CoreFoundation                  0x00057524 CFRunLoopRunSpecific + 2296
37  CoreFoundation                  0x00056c18 CFRunLoopRunInMode + 44
38  GraphicsServices                0x000041c0 GSEventRunModal + 188
39  UIKit                           0x00003c28 -[UIApplication _run] + 552
40  UIKit                           0x00002228 UIApplicationMain + 960
41  FooApp                          0x00002510 main (main.m:11)
42  FooApp                          0x000024ac start + 44

Thread 1:
0   libSystem.B.dylib               0x00001488 mach_msg_trap + 20
1   libSystem.B.dylib               0x00004064 mach_msg + 60
2   CoreFoundation                  0x00057002 CFRunLoopRunSpecific + 982
3   CoreFoundation                  0x00056c18 CFRunLoopRunInMode + 44
4   WebCore                         0x000841d4 RunWebThread(void*) + 412
5   libSystem.B.dylib               0x0002b780 _pthread_body + 20

Thread 2:
0   libSystem.B.dylib               0x00001488 mach_msg_trap + 20
1   libSystem.B.dylib               0x00004064 mach_msg + 60
2   CoreFoundation                  0x00057002 CFRunLoopRunSpecific + 982
3   CoreFoundation                  0x00056c18 CFRunLoopRunInMode + 44
4   Foundation                      0x0005a998 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 172
5   Foundation                      0x00053ac6 -[NSThread main] + 42
6   Foundation                      0x00001d0e __NSThread__main__ + 852
7   libSystem.B.dylib               0x0002b780 _pthread_body + 20

Thread 3:
0   libSystem.B.dylib               0x000262c0 select$DARWIN_EXTSN + 20
1   CoreFoundation                  0x000207e2 __CFSocketManager + 342
2   libSystem.B.dylib               0x0002b780 _pthread_body + 20

Thread 4:
0   libSystem.B.dylib               0x000916f0 __semwait_signal + 24
1   libSystem.B.dylib               0x000334a8 _pthread_cond_wait + 1592
2   libSystem.B.dylib               0x00032c6c pthread_cond_wait + 48
3   JavaScriptCore                  0x000071c4 WTF::ThreadCondition::wait(WTF::Mutex&) + 4
4   WebCore                         0x005c00dc WebCore::LocalStorageThread::localStorageThread() + 128
5   libSystem.B.dylib               0x0002b780 _pthread_body + 20

Thread 5:
0   libSystem.B.dylib               0x000916f0 __semwait_signal + 24
1   libSystem.B.dylib               0x000334a8 _pthread_cond_wait + 1592
2   libSystem.B.dylib               0x00032c6c pthread_cond_wait + 48
3   JavaScriptCore                  0x000071c4 WTF::ThreadCondition::wait(WTF::Mutex&) + 4
4   WebCore                         0x005c00dc WebCore::LocalStorageThread::localStorageThread() + 128
5   libSystem.B.dylib               0x0002b780 _pthread_body + 20

Thread 0 crashed with ARM Thread State:
    r0: 0x00000000    r1: 0x00000000      r2: 0x00000001      r3: 0x385333cc
    r4: 0x00000006    r5: 0x040e5a8c      r6: 0x2fffe610      r7: 0x2fffe620
    r8: 0x00000000    r9: 0x0000000a     r10: 0x00000009     r11: 0x0021fc40
    ip: 0x00000025    sp: 0x2fffe620      lr: 0x33994b21      pc: 0x33994b2c
  cpsr: 0x000f0010

Binary Images:
    0x1000 -    0x78fff +FooApp armv6  <5e810908faf129323bdd2bdede3daabd> /var/mobile/Applications/8C745160-4129-4369-B201-F55CC42D0466/FooApp.app/FooApp
  0x189000 -   0x18afff  dns.so armv6  <957f94410f77a351749ac39d2b4b4abe> /usr/lib/info/dns.so
0x2fe00000 - 0x2fe26fff  dyld armv6  <544395a4b5546114b878d5131a84fd7f> /usr/lib/dyld
0x3000e000 - 0x3001afff  DataDetectorsCore armv6  <fd18ffc95012b76c319875bedd99eb43> /System/Library/PrivateFrameworks/DataDetectorsCore.framework/DataDetectorsCore
0x30092000 - 0x300c6fff  Security armv6  <fb2124d1711c8931a7df711d126193d0> /System/Library/Frameworks/Security.framework/Security
0x300ca000 - 0x3021efff  AudioToolbox armv6  <31bb7db82eece25ac6742672e3afbe02> /System/Library/Frameworks/AudioToolbox.framework/AudioToolbox
0x30343000 - 0x3034cfff  SpringBoardServices armv6  <f13747f4598b0f4b1442877adc75de5a> /System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices
0x30490000 - 0x30591fff  libicucore.A.dylib armv6  <a99c2e5d034344c7447a7420db2b36b1> /usr/lib/libicucore.A.dylib
0x30792000 - 0x30799fff  WebUI armv6  <bb2e1be75e3a51511bf16d54af1fa774> /System/Library/PrivateFrameworks/WebUI.framework/WebUI
0x3079a000 - 0x30804fff  libstdc++.6.dylib armv6  <a35cfd59eee09893fbab57794ad7cbaf> /usr/lib/libstdc++.6.dylib
0x30805000 - 0x30902fff  JavaScriptCore armv6  <41bc769b8c046770bac84eed2b08ff42> /System/Library/PrivateFrameworks/JavaScriptCore.framework/JavaScriptCore
0x30d13000 - 0x30df2fff  CoreData armv6  <20e4f1b34238c3984a7ab05c7edfbce5> /System/Library/Frameworks/CoreData.framework/CoreData
0x30df3000 - 0x30e16fff  libRIP.A.dylib armv6  <a53df8fe2c05c16f671e2502d0d21f60> /System/Library/Frameworks/CoreGraphics.framework/Resources/libRIP.A.dylib
0x30f96000 - 0x30f97fff  CoreSurface armv6  <f27efe4047d6b4319bc01edb9007a789> /System/Library/PrivateFrameworks/CoreSurface.framework/CoreSurface
0x30fba000 - 0x31067fff  ImageIO armv6  <572f72dbfb19a2fd37666bb1d58b13cb> /System/Library/PrivateFrameworks/ImageIO.framework/ImageIO
0x310b3000 - 0x310bdfff  libkxld.dylib armv6  <33215da7e582cbc93ad25bf1cdb8ea62> /usr/lib/system/libkxld.dylib
0x310be000 - 0x31278fff  CoreGraphics armv6  <41796502b08a751095dcd2b105d1931c> /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics
0x3138c000 - 0x313aafff  AddressBook armv6  <80bdcada8d61624b2bb0796b7155f570> /System/Library/Frameworks/AddressBook.framework/AddressBook
0x313e2000 - 0x3143dfff  CoreAudio armv6  <71fb4de4976308c0a3f86d127e46472b> /System/Library/Frameworks/CoreAudio.framework/CoreAudio
0x31465000 - 0x314a2fff  libCGFreetype.A.dylib armv6  <b299c486f638e82d10939b7c496b7d78> /System/Library/Frameworks/CoreGraphics.framework/Resources/libCGFreetype.A.dylib
0x31546000 - 0x315f3fff  WebKit armv6  <2bf8152a62e6cbc8a219d80489acb0e7> /System/Library/PrivateFrameworks/WebKit.framework/WebKit
0x31600000 - 0x3164dfff  IOKit armv6  <521cb10d7c6fb9ce21936db07a2587bb> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x316ba000 - 0x316c4fff  DataDetectorsUI armv6  <f84ebef0dfbdd719da4b52b5732e895f> /System/Library/PrivateFrameworks/DataDetectorsUI.framework/DataDetectorsUI
0x31767000 - 0x3176dfff  liblockdown.dylib armv6  <f18aa1ca3cc98cda954fd821ff88a3ac> /usr/lib/liblockdown.dylib
0x318f1000 - 0x3195efff  CFNetwork armv6  <58e56341b7a2a491c727a385b871f7b8> /System/Library/Frameworks/CFNetwork.framework/CFNetwork
0x319c4000 - 0x319fffff  CoreTelephony armv6  <98b8ac66b4615a56958655929505c985> /System/Library/PrivateFrameworks/CoreTelephony.framework/CoreTelephony
0x31a00000 - 0x31a0afff  MobileCoreServices armv6  <805d82b950722ad728d87e0c24089c4b> /System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices
0x31a22000 - 0x31a23fff  liblangid.dylib armv6  <f8f20663988ec129b14a4e5a06e1ab0d> /usr/lib/liblangid.dylib
0x31b59000 - 0x31c03fff  QuartzCore armv6  <5cab4e700e90abef71c1b2b695bd897a> /System/Library/Frameworks/QuartzCore.framework/QuartzCore
0x31c04000 - 0x31c38fff  SystemConfiguration armv6  <4b1e9c323f8c973bac2737cdccec8de3> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration
0x31ca1000 - 0x31cdffff  CoreText armv6  <fe5639949094efc4d973a1f6457a4e5c> /System/Library/PrivateFrameworks/CoreText.framework/CoreText
0x31cff000 - 0x31d03fff  libgermantok.dylib armv6  <9b523938db9da7cd317ed09e4845e4b2> /usr/lib/libgermantok.dylib
0x31d09000 - 0x31dfffff  libxml2.2.dylib armv6  <a2f276df14b4ded9650dea857293b4e9> /usr/lib/libxml2.2.dylib
0x31fd7000 - 0x31ffefff  AppSupport armv6  <db69446acd77981f1d9c968846e4c868> /System/Library/PrivateFrameworks/AppSupport.framework/AppSupport
0x31fff000 - 0x32df0fff  UIKit armv6  <4e881f8351712fd798c335af748b5b5f> /System/Library/Frameworks/UIKit.framework/UIKit
0x32e05000 - 0x32e5ffff  libsqlite3.dylib armv6  <61513660cb3e21b47ccbf5407e0efae5> /usr/lib/libsqlite3.dylib
0x32e78000 - 0x32f70fff  Foundation armv6  <a3612d56db60ccfc998caee19d9805d7> /System/Library/Frameworks/Foundation.framework/Foundation
0x32f71000 - 0x32f79fff  libgcc_s.1.dylib armv6  <6673f222acee5f3a208169712387862a> /usr/lib/libgcc_s.1.dylib
0x32f7a000 - 0x32f91fff  OpenGLES armv6  <8d075dd39e978efae59c70eeedfd858a> /System/Library/Frameworks/OpenGLES.framework/OpenGLES
0x32f9a000 - 0x32fc4fff  MobileQuickLook armv6  <accf1f4b9ad21f4873767c8556f6b48b> /System/Library/PrivateFrameworks/MobileQuickLook.framework/MobileQuickLook
0x33242000 - 0x3324efff  CoreVideo armv6  <63d65206a8853262b597f97b3d949f31> /System/Library/PrivateFrameworks/CoreVideo.framework/CoreVideo
0x3324f000 - 0x3324ffff  vecLib armv6  <c8a08b45effd5eb35a476a969628e52d> /System/Library/PrivateFrameworks/Accelerate.framework/Frameworks/vecLib.framework/vecLib
0x332b2000 - 0x332c2fff  libbsm.0.dylib armv6  <722065615a92c5d0c57395f0aa624b8d> /usr/lib/libbsm.0.dylib
0x332e8000 - 0x332e9fff  IOMobileFramebuffer armv6  <89abbd5846018f4b74250e8cb09eaf4c> /System/Library/PrivateFrameworks/IOMobileFramebuffer.framework/IOMobileFramebuffer
0x3335f000 - 0x33365fff  MBX2D armv6  <5246c74334f4daf6c0b876605134baa1> /System/Library/PrivateFrameworks/MBX2D.framework/MBX2D
0x33366000 - 0x33409fff  libobjc.A.dylib armv6  <54f0ebeeb9747bf5075f93e2a5043b5e> /usr/lib/libobjc.A.dylib
0x33730000 - 0x3373efff  libz.1.dylib armv6  <7a06dbf4af39c5b548306c7fb8ffcf0b> /usr/lib/libz.1.dylib
0x337df000 - 0x337fdfff  libresolv.9.dylib armv6  <c25b840bd418c833ab6c31a29389445a> /usr/lib/libresolv.9.dylib
0x33856000 - 0x33856fff  Accelerate armv6  <21e1dc9fad96f0d51afbeb7f7e006aaf> /System/Library/PrivateFrameworks/Accelerate.framework/Accelerate
0x33857000 - 0x33903fff  CoreFoundation armv6  <26d25c2c53c05db6e9adc24d5befaa2c> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
0x33904000 - 0x33a2afff  libSystem.B.dylib armv6  <0373fd64e915a17160732b29d343f95f> /usr/lib/libSystem.B.dylib
0x33a3d000 - 0x33a41fff  IOSurface armv6  <f19a15d8311b851caeba68c1fef33e11> /System/Library/PrivateFrameworks/IOSurface.framework/IOSurface
0x33a42000 - 0x34195fff  WebCore armv6  <65181be01889192c1252e2535531c99c> /System/Library/PrivateFrameworks/WebCore.framework/WebCore
0x3430f000 - 0x34349fff  libvDSP.dylib armv6  <cf9cc6079374718dce29cba9de48b993> /System/Library/PrivateFrameworks/Accelerate.framework/Frameworks/vecLib.framework/libvDSP.dylib
0x3434a000 - 0x34355fff  GraphicsServices armv6  <3a4ec1bf23242cddae5f606f0ed38930> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices

这是错误 47 所在的行:

    for (Item *item in model.items)

请注意，Item 是一个 Core Data 对象，model 是包含 Item 类型的 NSArray 项目的类，当 NSXML 解析器遍历每个下载的数据时，每当完成解析一个元素时，该类都会填充项目，它创建一个 Item 对象并保存到 Core Data 上下文中。我的项目中使用的是Three20。

Answer 1

根据一般经验，设备上发生的大多数崩溃仅是由于驱动器的某些问题造成的。 (特别是如果它显然不涉及任何其他设备特定功能，例如加速计。)最可能的原因是驱动器已满。当磁盘已满时，各种奇怪的事情就会开始发生。

在此崩溃中，Core Data 尝试加载故障(幽灵)对象的属性并失败。当缓存与存储不同步或者您以其他方式创建了在不了解上下文的情况下更改存储的条件时，可能会发生这种情况。

(1) 我首先查看设备是否已满，如果已满则释放一些空间。相反，您可以故意填充驱动器以尝试一致地触发错误。

(2) 如果您有多个上下文，请确保它们不会同时操作相同的对象。

编辑:

该错误可能是由模型返回的对象引起的。items 实际上不是“Item”类，它可能是缺少该属性的父类(super class)。这可以解释为什么当它尝试在(读入)实际属性中出错时会失败。

只是一个猜测。不知道为什么这只会发生在设备上。这里涉及网络吗？

来自故障点的更多代码可能会有所帮助。