尊敬的 SO'ers，您好，
最近突然出现了一个让我困惑的崩溃。它发生在Thread 2，似乎是内部的WebCore，是Exception Type SIGSEGV和Exception Code SEGV_ACCERR。完整的崩溃日志如下。
UIWebView该应用程序始终使用s。主要WebView显示大约 30 个驻留在磁盘上的图像，并使用自定义 NSURLProtocol 在本机和 JavaScript 之间传递消息，反之亦然。
我希望有人可以帮助我更好地理解这样的崩溃（那些在我的代码中没有指向特定类/方法/行的崩溃，似乎在 Apple 类中）以及如何诊断和修复它们。
我已经阅读SIGSEGV并在谷歌上搜索了崩溃报告中的许多信息。还没有发现任何有用的东西。在此先感谢您的任何指点。
Incident Identifier: [TODO]
CrashReporter Key: [TODO]
Hardware Model: iPad3,6
Process: CurrentTarget [56978]
Path: /var/mobile/Applications/XXXXXXX-5392-49F5-99AE-XXXXXXXXXXX/CurrentTarget.app/CurrentTarget
Identifier: com.xxx.xxxxxxx
Version: 1.10.7
Code Type: ARM
Parent Process: launchd [1]
Date/Time: 2013-07-05 14:38:02 +0000
OS Version: iPhone OS 6.1.3 (10B329)
Report Version: 104
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0x4
Crashed Thread: 2
Thread 0:
0 libsystem_kernel.dylib 0x3b67ce30 mach_msg_trap + 20
1 CoreFoundation 0x332d42bb __CFRunLoopServiceMachPort + 131
2 CoreFoundation 0x332d2fdb __CFRunLoopRun + 819
3 CoreFoundation 0x3324623d CFRunLoopRunSpecific + 356
4 CoreFoundation 0x332460c9 CFRunLoopRunInMode + 104
5 GraphicsServices 0x36e0133b GSEventRunModal + 74
6 UIKit 0x351622b9 UIApplicationMain + 1120
7 CurrentTarget 0x0000d6b3 main (main.m:15)
Thread 1:
0 libsystem_kernel.dylib 0x3b67d5d0 kevent64 + 24
1 libdispatch.dylib 0x3b5b4378 _dispatch_mgr_thread + 36
Thread 2 Crashed:
0 libobjc.A.dylib 0x3b1945ca objc_msgSend + 9
1 WebCore 0x393d86c9 WebCore::LayerFlushScheduler::runLoopObserverCallback(__CFRunLoopObserver*, unsigned long, void*) + 25
2 CoreFoundation 0x332d4941 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 21
3 CoreFoundation 0x332d2c39 __CFRunLoopDoObservers + 277
4 CoreFoundation 0x33246263 CFRunLoopRunSpecific + 394
5 CoreFoundation 0x332460c9 CFRunLoopRunInMode + 104
6 WebCore 0x3922a395 RunWebThread(void*) + 445
7 libsystem_c.dylib 0x3b5e60e1 _pthread_start + 309
Thread 3:
0 libsystem_kernel.dylib 0x3b67ce30 mach_msg_trap + 20
1 CoreFoundation 0x332d42bb __CFRunLoopServiceMachPort + 131
2 CoreFoundation 0x332d3031 __CFRunLoopRun + 905
3 CoreFoundation 0x3324623d CFRunLoopRunSpecific + 356
4 CoreFoundation 0x332460c9 CFRunLoopRunInMode + 104
5 Foundation 0x33b6a5c3 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 255
6 Foundation 0x33c0dc45 -[NSRunLoop(NSRunLoop) run] + 81
7 CurrentTarget 0x0002db85 +[AFURLConnectionOperation networkRequestThreadEntryPoint:] (AFURLConnectionOperation.m:162)
8 Foundation 0x33c17231 __NSThread__main__ + 973
9 libsystem_c.dylib 0x3b5e60e1 _pthread_start + 309
Thread 4:
0 libsystem_kernel.dylib 0x3b67ce30 mach_msg_trap + 20
1 CoreFoundation 0x332d42bb __CFRunLoopServiceMachPort + 131
2 CoreFoundation 0x332d3031 __CFRunLoopRun + 905
3 CoreFoundation 0x3324623d CFRunLoopRunSpecific + 356
4 CoreFoundation 0x332460c9 CFRunLoopRunInMode + 104
5 Foundation 0x33b9388d +[NSURLConnection(Loader) _resourceLoadLoop:] + 309
6 Foundation 0x33c17231 __NSThread__main__ + 973
7 libsystem_c.dylib 0x3b5e60e1 _pthread_start + 309
Thread 2 crashed with ARM Thread State:
r0: 0x00000004 r1: 0x39c10f51 r2: 0x000000cc r3: 0x0ab29439
r4: 0x0940c600 r5: 0x1ed70618 r6: 0x1ed70610 r7: 0x0073edf8
r8: 0x00000003 r9: 0x00000000 r10: 0x0073ee20 r11: 0x0000008a
ip: 0x3cf14568 sp: 0x0073edec lr: 0x39b7902b pc: 0x3b1945ca
cpsr: 0x20000030