我在iOS12中崩溃。
再现方式：
1。使用UIWebView播放视频，然后视频将以全屏模式播放。
2。视频开始播放后，点击左上角的缩小按钮以停止视频。
3。重放它，视频仍将保留在全屏状态。
4。重复步骤2和步骤3
。5。正常速度下，最多会发生10次崩溃。
崩溃的一些详细信息：
Hardware Model: iPhone10,3
Code Type: ARM-64 (Native)
Role: Non UI
Parent Process: launchd [1]
Date/Time: 2018-10-08 18:59:20.8570 +0800
Launch Time: 2018-10-08 18:58:58.7757 +0800
OS Version: iPhone OS 12.0 (16A366)
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x000047c300000111
VM Region Info: 0x47c300000111 is not in any region. Bytes after previous region: 78891569905938
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
MALLOC_NANO 0000000280000000-00000002a0000000 [512.0M] rw-/rwx SM=PRV
--->
UNUSED SPACE AT END
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [658]
Triggered by Thread: 0
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 WebCore 0x00000001be5f4270 VideoFullscreenControllerContext::rateChanged+ 4784752 (bool, float) + 308
1 WebCore 0x00000001be5f4164 VideoFullscreenControllerContext::rateChanged+ 4784484 (bool, float) + 40
2 libdispatch.dylib 0x00000001b529b6c8 _dispatch_call_block_and_release + 24
3 libdispatch.dylib 0x00000001b529c484 _dispatch_client_callout + 16
4 libdispatch.dylib 0x00000001b527bb44 _dispatch_main_queue_callback_4CF$VARIANT$armv81 + 1012
5 CoreFoundation 0x00000001b57f21bc __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
6 CoreFoundation 0x00000001b57ed084 __CFRunLoopRun + 1964
7 CoreFoundation 0x00000001b57ec5b8 CFRunLoopRunSpecific + 436
8 GraphicsServices 0x00000001b7a60584 GSEventRunModal + 100
9 UIKitCore 0x00000001e2117558 UIApplicationMain + 212
10 xxxx 0x00000001023d29e4 main + 59876 (main.m:16)
11 libdyld.dylib 0x00000001b52acb94 start + 4
Thread 1 name: JavaScriptCore bmalloc scavenger
Thread 1:
0 libsystem_kernel.dylib 0x00000001b53f8f0c __psynch_cvwait + 8
1 libsystem_pthread.dylib 0x00000001b547a4c8 _pthread_cond_wait$VARIANT$armv81 + 620
2 libc++.1.dylib 0x00000001b49c44d0 std::__1::condition_variable::wait+ 34000 (std::__1::unique_lock<std::__1::mutex>&) + 24
3 JavaScriptCore 0x00000001bcb5bd7c void std::__1::condition_variable_any::wait<std::__1::unique_lock<bmalloc::Mutex> >+ 376188 (std::__1::unique_lock<bmalloc::Mutex>&) + 104
4 JavaScriptCore 0x00000001bcb5fe70 bmalloc::Scavenger::threadRunLoop+ 392816 () + 176
5 JavaScriptCore 0x00000001bcb5f5a4 bmalloc::Scavenger::Scavenger+ 390564 (std::__1::lock_guard<bmalloc::Mutex>&) + 0
6 JavaScriptCore 0x00000001bcb61050 std::__1::__thread_specific_ptr<std::__1::__thread_struct>::set_pointer+ 397392 (std::__1::__thread_struct*) + 0
7 libsystem_pthread.dylib 0x00000001b547d2fc _pthread_body + 128
8 libsystem_pthread.dylib 0x00000001b547d25c _pthread_start + 48
9 libsystem_pthread.dylib 0x00000001b5480d08 thread_start + 4
Thread 2 name: WebThread
Thread 2:
0 libsystem_kernel.dylib 0x00000001b53eded0 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x00000001b53ed3a8 mach_msg + 72
2 libdispatch.dylib 0x00000001b526d630 _dispatch_mach_send_and_wait_for_reply + 500
3 libdispatch.dylib 0x00000001b526dad0 dispatch_mach_send_with_result_and_wait_for_reply$VARIANT$armv81 + 56
4 libxpc.dylib 0x00000001b54b4eb4 xpc_connection_send_message_with_reply_sync + 204
5 CoreMedia 0x00000001b8f1176c FigXPCRemoteClientSendSyncMessageCreatingReply + 36
6 MediaToolbox 0x00000001ba4e5868 remoteXPCAsset_GetStatusOfValueForProperty + 152
7 AVFoundation 0x00000001bb954930 -[AVFigAssetInspectorLoader _loadStatusForProperty:figAsset:error:] + 84
8 AVFoundation 0x00000001bb954af4 -[AVFigAssetInspectorLoader statusOfValueForKey:error:] + 312
9 WebCore 0x00000001be232e98 WebCore::MediaPlayerPrivateAVFoundationObjC::assetStatus+ 847512 () const + 248
10 WebCore 0x00000001be2213a8 WebCore::MediaPlayerPrivateAVFoundation::updateStates+ 775080 () + 764
11 WebCore 0x00000001be23dcec WebCore::MediaPlayerPrivateAVFoundationObjC::rateDidChange+ 892140 (double) + 24
12 WebCore 0x00000001be2222bc WebCore::MediaPlayerPrivateAVFoundation::dispatchNotification+ 778940 () + 1064
13 JavaScriptCore 0x00000001bcb273e0 WTF::dispatchFunctionsFromMainThread+ 160736 () + 308
14 Foundation 0x00000001b63135a0 __NSThreadPerformPerform + 336
15 CoreFoundation 0x00000001b57f25b8 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
16 CoreFoundation 0x00000001b57f2538 __CFRunLoopDoSource0 + 88
17 CoreFoundation 0x00000001b57f1e1c __CFRunLoopDoSources0 + 176
18 CoreFoundation 0x00000001b57ecce8 __CFRunLoopRun + 1040
19 CoreFoundation 0x00000001b57ec5b8 CFRunLoopRunSpecific + 436
20 WebCore 0x00000001be613ba4 RunWebThread+ 4914084 (void*) + 592
21 libsystem_pthread.dylib 0x00000001b547d2fc _pthread_body + 128
22 libsystem_pthread.dylib 0x00000001b547d25c _pthread_start + 48
23 libsystem_pthread.dylib 0x00000001b5480d08 thread_start + 4
有人知道吗？
也有类似的问题