This Jira was created from CrashReports submitted by the public due to the high number of occurrences.
Error message:
Access violation - code c0000005 (first/second chance not available)
Source Context:
13       
   14       /*-----------------------------------------------------------------------------------------------------------
   15       	FWeakObjectPtr
   16       -------------------------------------------------------------------------------------------------------------*/
   17       
   18       /**  
   19        * Copy from an object pointer
   20        * @param Object object to create a weak pointer to
   21       **/
   22       void FWeakObjectPtr::operator=(const class UObject *Object)
   23       {
   24       	if (Object // && UObjectInitialized() we might need this at some point, but it is a speed hit we would prefer to avoid
   25       		)
   26       	{
   27 ***** 		ObjectIndex = GUObjectArray.ObjectToIndex((UObjectBase*)Object);
   28       		ObjectSerialNumber = GUObjectArray.AllocateSerialNumber(ObjectIndex);
   29       		checkSlow(SerialNumbersMatch());
   30       	}
   31       	else
   32       	{
   33       		Reset();
   34       	}
   35       }
   36       
   37       bool FWeakObjectPtr::IsValid(bool bEvenIfPendingKill, bool bThreadsafeTest) const
   38       {
   39       	// This is the external function, so we just pass through to the internal inlined method.
   40       	return Internal_IsValid(bEvenIfPendingKill, bThreadsafeTest);
   41       }
   42       
Most recent user affected CL: 3172292
Logs: 
[Link Removed]
[Link Removed]
[Link Removed]
CrashReporter User Descriptions:
This is one repro:
UE4Editor_CoreUObject!FWeakObjectPtr::operator=() [weakobjectptr.cpp:28] UE4Editor_Sequencer!FSequencerEdMode::OnKeySelected() [sequenceredmode.cpp:87] UE4Editor_Sequencer!FSequencerEdModeTool::InputKey() [sequenceredmode.cpp:420] UE4Editor_UnrealEd!FEdMode::InputKey() [edmode.cpp:294] UE4Editor_Sequencer!FSequencerEdMode::InputKey() [sequenceredmode.cpp:60] UE4Editor_UnrealEd!FEditorModeTools::InputKey() [editormodemanager.cpp:689] UE4Editor_UnrealEd!FEditorViewportClient::InputKey() [editorviewportclient.cpp:2200] UE4Editor_UnrealEd!FLevelEditorViewportClient::InputKey() [leveleditorviewport.cpp:2476] UE4Editor_Engine!FSceneViewport::OnMouseButtonDown() [sceneviewport.cpp:403] UE4Editor_Slate!SViewport::OnMouseButtonDown() [sviewport.cpp:182] UE4Editor_Slate!<lambda_7097b900f0e4be30d80fb18f98c51ea0>::operator() [slateapplication.cpp:4518] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_7097b900f0e4be30d80fb18f98c51ea0> >() [slateapplication.cpp:215] UE4Editor_Slate!FSlateApplication::RoutePointerDownEvent() [slateapplication.cpp:4507] UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDownEvent() [slateapplication.cpp:4465] UE4Editor_Slate!FSlateApplication::OnMouseDown() [slateapplication.cpp:4399] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1518] UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:1850] UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:745] UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:667] user32!UserCallWinProcCheckWow() user32!DispatchMessageWorker() UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:903] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:2729] UE4Editor!GuardedMain() [launch.cpp:148] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:126] UE4Editor!WinMain() [launchwindows.cpp:200] UE4Editor!__scrt_common_main_seh() [exe_common.inl:264] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-38205 in the post.
| 1 | 
| Component | UE - Anim - Sequencer | 
|---|---|
| Affects Versions | 4.11, 4.12, 4.13 | 
| Target Fix | 4.16 | 
| Created | Nov 3, 2016 | 
|---|---|
| Resolved | Apr 11, 2017 | 
| Updated | May 1, 2018 |