我有一个使用当前 Facebook iOS SDK 的 iPhone（iOS 原生）应用程序。当尝试通过单点登录过程连接我的应用程序时，我经常遇到崩溃，说明我的应用程序“有超出允许时间的活动断言”。在查看 Stack Overflow 上的其他类似报告后（例如iPhone 应用程序“有超出允许时间的有效断言”），我没有找到任何适合我情况的东西。我正在遵循 Facebook 推荐的集成 SSO 的做法（来自https://developers.facebook.com/docs/mobile/ios/build/#implementsso）。这意味着我在我的主线程上调用 Facebook SDK。Facebook 似乎并不认为这会是个问题。
谁能解释这个特定错误的含义？我认为某些 iOS 主管机制正在杀死我的应用程序，因为它花费了太长时间来做某事，但是有什么特别的东西呢？是不是因为前台任务被锁定太久？或者是什么？
这是显示错误的 iOS 应用程序崩溃报告。
Incident Identifier: F2486727-9EAC-4D7F-8A45-07AC51ADD186
CrashReporter Key: b3825455d63e6e7f659074b5ea5fb89cf8ed1b9f
Hardware Model: iPhone2,1
Process: JouleBug [2060]
Path: /var/mobile/Applications/FA3DB4BA-92AF-4D14-AD3A-1553EFA1FA16/JouleBug.app/JouleBug
Identifier: JouleBug
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2012-07-05 14:44:30.751 -0400
OS Version: iPhone OS 5.1.1 (9B206)
Report Version: 104
Exception Type: 00000020
Exception Codes: 0x8badf00d
Highlighted Thread: 3
Application Specific Information:
JouleBug[2060] has active assertions beyond permitted time:
{(
<SBProcessAssertion: 0xe2ed000> identifier: Suspending process: JouleBug[2060] permittedBackgroundDuration: 10.000000 reason: suspend owner pid:52 preventSuspend preventThrottleDownCPU preventThrottleDownUI
)}
Elapsed total CPU time (seconds): 6.190 (user 6.190, system 0.000), 84% CPU
Elapsed application CPU time (seconds): 1.515, 21% CPU
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 libsystem_kernel.dylib 0x37e23dcc __open + 8
1 Foundation 0x31ab412a _NSmkstemp83 + 322
2 Foundation 0x31ab3f4a _NSCreateTemporaryFile + 118
3 Foundation 0x31ab3b36 _NSWriteBytesToFileWithExtendedAttributes + 186
4 Foundation 0x31ab3a70 _NSWriteBytesToFile + 24
5 Foundation 0x31ab3a48 -[NSData(NSData) writeToFile:atomically:] + 76
6 JouleBug 0x00109c5c -[LazyJSONModelMapper save] (LazyJSONModelMapper.m:106)
7 JouleBug 0x00109b40 __36-[LazyJSONModelMapper initWithFile:]_block_invoke_0 (LazyJSONModelMapper.m:63)
8 Foundation 0x31a856c2 -[__NSObserver _doit:] + 286
9 Foundation 0x31b1152a __67-[NSNotificationCenter addObserverForName:object:queue:usingBlock:]_block_invoke_0 + 22
10 CoreFoundation 0x311d6540 ___CFXNotificationPost_block_invoke_0 + 64
11 CoreFoundation 0x31162090 _CFXNotificationPost + 1400
12 Foundation 0x31a853e4 -[NSNotificationCenter postNotificationName:object:userInfo:] + 60
13 UIKit 0x3090524e -[UIApplication _handleApplicationSuspend:eventInfo:] + 786
14 UIKit 0x30895ef8 -[UIApplication handleEvent:withNewEvent:] + 2088
15 UIKit 0x30895560 -[UIApplication sendEvent:] + 48
16 UIKit 0x30894f34 _UIApplicationHandleEvent + 5820
17 GraphicsServices 0x331db224 PurpleEventCallback + 876
18 CoreFoundation 0x311deacc __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 8
19 CoreFoundation 0x311de32e __CFRunLoopDoSources0 + 358
20 CoreFoundation 0x311dd03e __CFRunLoopRun + 646
21 CoreFoundation 0x3116049e CFRunLoopRunSpecific + 294
22 CoreFoundation 0x31160366 CFRunLoopRunInMode + 98
23 GraphicsServices 0x331da432 GSEventRunModal + 130
24 UIKit 0x308c3cce UIApplicationMain + 1074
25 JouleBug 0x00033ac6 main (main.m:14)
26 JouleBug 0x00003900 0x1000 + 10496
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x37e143a8 kevent + 24
1 libdispatch.dylib 0x35a2eea4 _dispatch_mgr_invoke + 708
2 libdispatch.dylib 0x35a2ebc2 _dispatch_mgr_thread + 30
Thread 2:
0 libsystem_kernel.dylib 0x37e24cd4 __workq_kernreturn + 8
1 libsystem_c.dylib 0x352aaf36 _pthread_wqthread + 610
2 libsystem_c.dylib 0x352aacc8 start_wqthread + 0
Thread 3 name: WebThread
Thread 3:
0 libsystem_kernel.dylib 0x37e240d8 __psynch_mutexwait + 24
1 libsystem_c.dylib 0x352a4674 pthread_mutex_lock + 376
2 WebCore 0x362614e8 _ZL17_WebTryThreadLockb + 208
3 WebCore 0x362c016c _ZL19SendDelegateMessageP12NSInvocation + 700
4 WebKit 0x36bfad80 -[_WebSafeForwarder forwardInvocation:] + 112
5 CoreFoundation 0x3120ca7c ___forwarding___ + 660
6 CoreFoundation 0x31167648 _CF_forwarding_prep_0 + 40
7 WebCore 0x3631bf7c WebCore::FrameLoader::finishedParsing() + 56
8 WebCore 0x3631bf12 WebCore::Document::finishedParsing() + 186
9 WebCore 0x3631be50 WebCore::HTMLTreeBuilder::finished() + 16
10 WebCore 0x3630cfbe WebCore::HTMLDocumentParser::prepareToStopParsing() + 106
11 WebCore 0x3630cc9e WebCore::HTMLDocumentParser::finish() + 90
12 WebCore 0x3630cc3a WebCore::Document::finishParsing() + 14
13 WebCore 0x36309e62 WebCore::DocumentWriter::endIfNotLoadingMainResource() + 74
14 WebCore 0x363084fa WebCore::DocumentLoader::finishedLoading() + 74
15 WebCore 0x363559c8 WebCore::FrameLoader::finishedLoading() + 48
16 WebCore 0x36355938 WebCore::MainResourceLoader::didFinishLoading(double) + 88
17 WebCore 0x363558c2 _ZN7WebCoreL16didFinishLoadingEP16_CFURLConnectionPKv + 46
18 CFNetwork 0x349997ee URLConnectionClient::_clientDidFinishLoading(URLConnectionClient::ClientConnectionEventQueue*) + 186
19 CFNetwork 0x3498e49e URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XClientEvent, XClientEventParams>*, long) + 418
20 CFNetwork 0x3498e592 URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XClientEvent, XClientEventParams>*, long) + 662
21 CFNetwork 0x3498e19c URLConnectionClient::processEvents() + 100
22 CFNetwork 0x3498e0d2 MultiplexerSource::perform() + 150
23 CoreFoundation 0x311deacc __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 8
24 CoreFoundation 0x311de32e __CFRunLoopDoSources0 + 358
25 CoreFoundation 0x311dd03e __CFRunLoopRun + 646
26 CoreFoundation 0x3116049e CFRunLoopRunSpecific + 294
27 CoreFoundation 0x31160366 CFRunLoopRunInMode + 98
28 WebCore 0x36304c9c _ZL12RunWebThreadPv + 396
29 libsystem_c.dylib 0x352b072e _pthread_start + 314
30 libsystem_c.dylib 0x352b05e8 thread_start + 0
Thread 4:
0 libsystem_kernel.dylib 0x37e14004 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x37e141fa mach_msg + 50
2 CoreFoundation 0x311de3ec __CFRunLoopServiceMachPort + 120
3 CoreFoundation 0x311dd124 __CFRunLoopRun + 876
4 CoreFoundation 0x3116049e CFRunLoopRunSpecific + 294
5 CoreFoundation 0x311dd444 CFRunLoopRun + 92
6 JouleBug 0x00071800 +[ASIHTTPRequest runRequests] (ASIHTTPRequest.m:4772)
7 Foundation 0x31a92a7a -[NSThread main] + 66
8 Foundation 0x31b2658a __NSThread__main__ + 1042
9 libsystem_c.dylib 0x352b072e _pthread_start + 314
10 libsystem_c.dylib 0x352b05e8 thread_start + 0
Thread 5 name: com.apple.NSURLConnectionLoader
Thread 5:
0 libsystem_kernel.dylib 0x37e14004 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x37e141fa mach_msg + 50
2 CoreFoundation 0x311de3ec __CFRunLoopServiceMachPort + 120
3 CoreFoundation 0x311dd124 __CFRunLoopRun + 876
4 CoreFoundation 0x3116049e CFRunLoopRunSpecific + 294
5 CoreFoundation 0x31160366 CFRunLoopRunInMode + 98
6 Foundation 0x31a92bb2 +[NSURLConnection(Loader) _resourceLoadLoop:] + 302
7 Foundation 0x31a92a7a -[NSThread main] + 66
8 Foundation 0x31b2658a __NSThread__main__ + 1042
9 libsystem_c.dylib 0x352b072e _pthread_start + 314
10 libsystem_c.dylib 0x352b05e8 thread_start + 0
Thread 6 name: com.apple.CFSocket.private
Thread 6:
0 libsystem_kernel.dylib 0x37e24570 __select + 20
1 CoreFoundation 0x311e263a __CFSocketManager + 726
2 libsystem_c.dylib 0x352b072e _pthread_start + 314
3 libsystem_c.dylib 0x352b05e8 thread_start + 0
Thread 7:
0 libsystem_kernel.dylib 0x37e14004 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x37e141fa mach_msg + 50
2 CoreFoundation 0x311de3ec __CFRunLoopServiceMachPort + 120
3 CoreFoundation 0x311dd124 __CFRunLoopRun + 876
4 CoreFoundation 0x3116049e CFRunLoopRunSpecific + 294
5 CoreFoundation 0x31160366 CFRunLoopRunInMode + 98
6 Foundation 0x31a86b6e -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 250
7 Foundation 0x31aa051c -[NSRunLoop(NSRunLoop) run] + 72
8 JouleBug 0x0014e516 0x1000 + 1365270
9 Foundation 0x31a92a7a -[NSThread main] + 66
10 Foundation 0x31b2658a __NSThread__main__ + 1042
11 libsystem_c.dylib 0x352b072e _pthread_start + 314
12 libsystem_c.dylib 0x352b05e8 thread_start + 0
Thread 8 name: Dispatch queue: com.apple.root.default-priority
Thread 8:
0 libsystem_kernel.dylib 0x37e2451c __rename + 8
1 libsystem_kernel.dylib 0x37e15b6e rename + 2
2 Foundation 0x31ab3dac _NSWriteBytesToFileWithExtendedAttributes + 816
3 Foundation 0x31ab3a70 _NSWriteBytesToFile + 24
4 Foundation 0x31ab3a48 -[NSData(NSData) writeToFile:atomically:] + 76
5 JouleBug 0x00109c5c -[LazyJSONModelMapper save] (LazyJSONModelMapper.m:106)
6 JouleBug 0x00109a4e -[LazyJSONModelMapper initWithFile:] (LazyJSONModelMapper.m:85)
7 JouleBug 0x001097c6 -[LazyJSONModelMapper initWithData:fromFile:] (LazyJSONModelMapper.m:45)
8 JouleBug 0x00089e5c +[GameDataManager storePinFromPinDict:] (GameDataManager.m:238)
9 JouleBug 0x000dd378 +[GameDataLoader processData:] (GameDataLoader.m:62)
10 JouleBug 0x000ae300 +[DataLoader refreshDataSynchronously] (DataLoader.m:54)
11 JouleBug 0x000ae29c __25+[DataLoader refreshData]_block_invoke_0 (DataLoader.m:36)
12 Foundation 0x31acbe50 -[NSBlockOperation main] + 196
13 Foundation 0x31aad38c -[__NSOperationInternal start] + 856
14 JouleBug 0x000ccb06 -[TimedBlockOperation start] (NSOperationExtensions.m:96)
15 Foundation 0x31b1678c __block_global_6 + 96
16 libdispatch.dylib 0x35a22c52 _dispatch_call_block_and_release + 6
17 libdispatch.dylib 0x35a2e7b4 _dispatch_worker_thread2 + 256
18 libsystem_c.dylib 0x352aadf4 _pthread_wqthread + 288
19 libsystem_c.dylib 0x352aacc8 start_wqthread + 0
Thread 9:
0 libsystem_kernel.dylib 0x37e24cd4 __workq_kernreturn + 8
1 libsystem_c.dylib 0x352aaf36 _pthread_wqthread + 610
2 libsystem_c.dylib 0x352aacc8 start_wqthread + 0
Thread 10:
0 libsystem_kernel.dylib 0x37e24cd4 __workq_kernreturn + 8
1 libsystem_c.dylib 0x352aaf36 _pthread_wqthread + 610
2 libsystem_c.dylib 0x352aacc8 start_wqthread + 0
Thread 11 name: WebCore: CFNetwork Loader
Thread 11:
0 libsystem_kernel.dylib 0x37e14004 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x37e141fa mach_msg + 50
2 CoreFoundation 0x311de3ec __CFRunLoopServiceMachPort + 120
3 CoreFoundation 0x311dd124 __CFRunLoopRun + 876
4 CoreFoundation 0x3116049e CFRunLoopRunSpecific + 294
5 CoreFoundation 0x31160366 CFRunLoopRunInMode + 98
6 WebCore 0x3632e0d2 _ZN7WebCoreL15runLoaderThreadEPv + 122
7 libsystem_c.dylib 0x352b072e _pthread_start + 314
8 libsystem_c.dylib 0x352b05e8 thread_start + 0
Thread 12:
0 libsystem_kernel.dylib 0x37e24cd4 __workq_kernreturn + 8
1 libsystem_c.dylib 0x352aaf36 _pthread_wqthread + 610
2 libsystem_c.dylib 0x352aacc8 start_wqthread + 0
Unknown thread crashed with unknown flavor: 5, state_count: 1