每天都有这样的情况发生（频率每天保持 1-3 次，疯狂的一天是 5 次，印象特别深刻，不明觉厉）

环境

Tag	Platform
Device:	iPhone6 Plus
Identifier:	com.tencent.mqq
Version:	5.5.1.426 (5.5.1)
OS Version:	iOS 8.3 (12F70)

操作步骤记录 (记忆，毕竟我不是 tencent 的)

• 点击企鹅图标打开程序
• 输入账号密码点击登陆
• 选择好友聊天、聊天、聊天
  

结果

就这样闪了，类似 Home 键作用,无任何提示信息，重新打开程序需要重新加载进程等等

Log（这里提供今天的）

Exception Type:  EXC_CRASH (SIGSEGV)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread:  1

Thread 0 name:  Dispatch queue: com.apple.avfoundation.videodataoutput.bufferqueue
Thread 0:
0   libsystem_kernel.dylib          0x3912a28c __kill + 8
1   QQ                              0x00e1cd81 0x4000 + 14781825
2   libsystem_platform.dylib        0x391a5879 _sigtramp + 41
3   libsystem_malloc.dylib          0x39155487 malloc + 51
4   AVFoundation                    0x2907ec99 -[AVCaptureVideoDataOutput _handleRemoteQueueOperation:] + 305
5   AVFoundation                    0x2907eb41 __47-[AVCaptureVideoDataOutput _updateRemoteQueue:]_block_invoke + 161
6   CoreMedia                       0x2acc73c1 __FigRemoteOperationReceiverCreateMessageReceiver_block_invoke + 209
7   CoreMedia                       0x2acd9ee3 __FigRemoteQueueReceiverSetHandler_block_invoke2 + 171
8   libdispatch.dylib               0x3903f2cd _dispatch_client_callout + 21
9   libdispatch.dylib               0x3905116f _dispatch_source_latch_and_call + 1603
10  libdispatch.dylib               0x39040e11 _dispatch_source_invoke + 209
11  libdispatch.dylib               0x39047395 _dispatch_queue_drain + 553
12  libdispatch.dylib               0x39041aa9 _dispatch_queue_invoke + 81
13  libdispatch.dylib               0x39042987 _dispatch_main_queue_callback_4CF + 395
14  CoreFoundation                  0x2a51e605 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 5
15  CoreFoundation                  0x2a51cd05 __CFRunLoopRun + 1509
16  CoreFoundation                  0x2a4691fd CFRunLoopRunSpecific + 473
17  CoreFoundation                  0x2a46900f CFRunLoopRunInMode + 103
18  GraphicsServices                0x31d021fd GSEventRunModal + 133
19  UIKit                           0x2dc0da55 UIApplicationMain + 1437
20  QQ                              0x002d97b1 0x4000 + 2971569
21  libdyld.dylib                   0x39060aad start + 1

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1 Crashed:
0   libsystem_kernel.dylib          0x39117224 kevent64 + 24
1   libdispatch.dylib               0x3904c0ed _dispatch_mgr_invoke + 277
2   libdispatch.dylib               0x39040d37 _dispatch_mgr_thread + 35

Thread 2 name:  msfthread
Thread 2:
0   libsystem_kernel.dylib          0x39117474 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x39117269 mach_msg + 37
2   CoreFoundation                  0x2a51e56f __CFRunLoopServiceMachPort + 143
3   CoreFoundation                  0x2a51cb15 __CFRunLoopRun + 1013
4   CoreFoundation                  0x2a4691fd CFRunLoopRunSpecific + 473
5   CoreFoundation                  0x2a46900f CFRunLoopRunInMode + 103
6   Foundation                      0x2b1d2139 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 261
7   Foundation                      0x2b220221 -[NSRunLoop(NSRunLoop) run] + 77
8   QQ                              0x002153f3 0x4000 + 2167795
9   Foundation                      0x2b2973b7 __NSThread__main__ + 1115
10  libsystem_pthread.dylib         0x391a8e21 _pthread_body + 137
11  libsystem_pthread.dylib         0x391a8d93 _pthread_start + 115
12  libsystem_pthread.dylib         0x391a6b1c thread_start + 4

Thread 3 name:  msfsafethread
Thread 3:
0   libsystem_kernel.dylib          0x39117474 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x39117269 mach_msg + 37
2   CoreFoundation                  0x2a51e56f __CFRunLoopServiceMachPort + 143
3   CoreFoundation                  0x2a51cb15 __CFRunLoopRun + 1013
4   CoreFoundation                  0x2a4691fd CFRunLoopRunSpecific + 473
5   CoreFoundation                  0x2a46900f CFRunLoopRunInMode + 103
6   Foundation                      0x2b1d2139 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 261
7   Foundation                      0x2b220221 -[NSRunLoop(NSRunLoop) run] + 77
8   QQ                              0x00213d3b 0x4000 + 2161979
9   Foundation                      0x2b2973b7 __NSThread__main__ + 1115
10  libsystem_pthread.dylib         0x391a8e21 _pthread_body + 137
11  libsystem_pthread.dylib         0x391a8d93 _pthread_start + 115
12  libsystem_pthread.dylib         0x391a6b1c thread_start + 4

Thread 4:
0   libsystem_kernel.dylib          0x39117474 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x39117269 mach_msg + 37
2   CoreFoundation                  0x2a51e56f __CFRunLoopServiceMachPort + 143
3   CoreFoundation                  0x2a51cb15 __CFRunLoopRun + 1013
4   CoreFoundation                  0x2a4691fd CFRunLoopRunSpecific + 473
5   CoreFoundation                  0x2a4b1f1f CFRunLoopRun + 95
6   QQ                              0x00a71451 0x4000 + 10933329
7   Foundation                      0x2b2973b7 __NSThread__main__ + 1115
8   libsystem_pthread.dylib         0x391a8e21 _pthread_body + 137
9   libsystem_pthread.dylib         0x391a8d93 _pthread_start + 115
10  libsystem_pthread.dylib         0x391a6b1c thread_start + 4

QQ    0x4000 + *  

由于楼主 iOS 日志的分析是扒自网络，这里不敢妄下断言，还请大神分析分析，是我机器问题么？请补刀！！别太狠呐！！