我的用户收到了一些崩溃报告，下面复制了一个神秘的内容。不幸的是我无法重现它，所以我不能给任何代码和平。我没有太多体验如何分析这个崩溃，我认为在我的应用程序中有一个NSManagedObject子类没有得到适当保留（也许它是弱而不是强？）。
我尝试使用NSZombies调试我的应用，但它没有帮助（因为在我看来，消息被发送到一个无效的对象）。
欢迎任何想法，我能够更接近解决方案。
（线程6崩溃了，而不是主线程。）
Incident Identifier: 00CFA055-D5C3-43B4-8FFB-C6DBFAB8DB91
CrashReporter Key: 890F7AB9-9E86-425F-BE09-12D9B1AEB42F
Hardware Model: iPhone6,1
Process: MySuperApp [10987]
Path: /Users/USER/MySuperApp.app/MySuperApp
Identifier: com.mysuperapp.mysuperappapp
Version: 528
Code Type: ARM-64
Parent Process: launchd [1]
Date/Time: 2015-02-14T18:00:23Z
OS Version: iPhone OS 7.1.2 (11D257)
Report Version: 104
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0x23cbbeb8
Crashed Thread: 6
Application Specific Information:
objc_msgSend() selector name: _queueForDealloc:
Thread 0:
0 CoreText 0x0000000186176b5c TAATMorphTableMorx::GetChain(unsigned int&) + 12
1 CoreText 0x0000000186183234 TShapingEngine::ShapeGlyphs(TLine&, TCharStream const*, CFRange&, TGlyphList<TDeletedGlyphIndex>*) + 324
2 CoreText 0x0000000186182ad8 TTypesetter::TTypesetter(__CFArray const*, __CFString const*, void const* (*)(__CTRun const*, __CFString const*, void*), void*) + 192
3 CoreText 0x00000001861828f0 CTTypesetterCreateWithRunArray + 88
4 UIFoundation 0x000000018eafded8 -[NSATSGlyphStorage createCTTypesetter] + 1464
5 UIFoundation 0x000000018eaf8efc -[NSATSTypesetter _ctTypesetter] + 332
6 UIFoundation 0x000000018eb01b34 -[NSATSLineFragment layoutForStartingGlyphAtIndex:characterIndex:minPosition:maxPosition:lineFragmentRect:] + 140
7 UIFoundation 0x000000018eaf9a68 -[NSATSTypesetter _layoutLineFragmentStartingWithGlyphAtIndex:characterIndex:atPoint:renderingContext:] + 2144
8 UIFoundation 0x000000018eb07874 -[NSSingleLineTypesetter createRenderingContextForCharacterRange:typesetterBehavior:usesScreenFonts:hasStrongRight:maximumWidth:] + 412
9 UIFoundation 0x000000018eb38aac __NSStringDrawingEngine + 16812
10 UIFoundation 0x000000018eb3a248 -[NSAttributedString boundingRectWithSize:options:context:] + 1508
11 UIKit 0x00000001889ad868 -[UILabel _drawTextInRect:baselineCalculationOnly:] + 792
12 UIKit 0x0000000188a1dca0 -[UILabel drawTextInRect:] + 524
13 UIKit 0x0000000188a1da34 -[UIView drawLayer:inContext:] + 364
14 QuartzCore 0x00000001885b4f7c -[CALayer drawInContext:] + 140
15 QuartzCore 0x000000018859f55c CABackingStoreUpdate_ + 2432
16 QuartzCore 0x000000018859ebc8 x_blame_allocations + 108
17 QuartzCore 0x000000018859e758 CA::Layer::display_() + 1256
18 QuartzCore 0x000000018857f01c CA::Layer::display_if_needed(CA::Transaction*) + 240
19 QuartzCore 0x000000018857ece4 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 40
20 QuartzCore 0x000000018857e560 CA::Context::commit_transaction(CA::Transaction*) + 276
21 QuartzCore 0x000000018857e304 CA::Transaction::commit() + 420
22 QuartzCore 0x0000000188577c38 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 76
23 CoreFoundation 0x000000018598f858 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 28
24 CoreFoundation 0x000000018598cae0 __CFRunLoopDoObservers + 368
25 CoreFoundation 0x000000018598ce6c __CFRunLoopRun + 760
26 CoreFoundation 0x00000001858cddd0 CFRunLoopRunSpecific + 452
27 GraphicsServices 0x000000018b5b5c0c GSEventRunModal + 168
28 UIKit 0x00000001889fefc4 UIApplicationMain + 1156
29 MySuperApp 0x000000010011ee88 main (main.m:16)
30 libdyld.dylib 0x00000001924cbaa0 start + 0
Thread 6 Crashed:
0 libobjc.A.dylib 0x0000000191ee81d0 objc_msgSend + 16
1 CoreData 0x00000001856e0bd0 -[NSManagedObject release] + 168
2 CoreData 0x00000001856d6aa8 -[_PFArray dealloc] + 96
3 libobjc.A.dylib 0x0000000191ef1474 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 520
4 libdispatch.dylib 0x00000001924b72e4 _dispatch_root_queue_drain + 596
5 libdispatch.dylib 0x00000001924b74fc _dispatch_worker_thread2 + 72
6 libsystem_pthread.dylib 0x00000001926456bc _pthread_wqthread + 356
7 libsystem_pthread.dylib 0x000000019264554c start_wqthread + 4
Thread 6 crashed with ARM-64 Thread State:
pc: 0x0000000191ee81d0 fp: 0x00000001100b39c0 sp: 0x00000001100b39a0 x0: 0x0000000171e5a040
x1: 0x00000001858968c2 x2: 0x000000017aad6ea0 x3: 0x00000001925ffcdc x4: 0x0000000000000001
x5: 0x0000000000000010 x6: 0x0000000175ccff80 x7: 0x0000000000000000 x8: 0x00000001928b1430
x9: 0x0000000023cbbea8 x10: 0x0000000000000000 x11: 0x00000088000000ff x12: 0x000000014f060e10
x13: 0xbadd0ade23cbbead x14: 0xffffffffffffffff x15: 0x0000000000000001 x16: 0x0000000191ee81c0
x17: 0x00000001856e0b24 x18: 0x0000000000000000 x19: 0x000000017aad6ea0 x20: 0x00000001928d1000
x21: 0x000000019291e200 x22: 0x00000001928d1000 x23: 0x0000000000000000 x24: 0x0000000000000010
x25: 0x000000010e674038 x26: 0xa3a3a3a3a3a3a3a3 x27: 0x0000000000000001 x28: 0x0000000000000000
lr: 0x00000001856e0bd0 cpsr: 0x0000000020000000
答案 0 :(得分：0)
所以，我找到了基于this awesome framework的原因来调试CD并发性。原因与自动释放池和NSManagedObject的章节中描述的in this tutorial完全相同。