This is a common crash coming out of the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred.
The callstack seems to be the same as [Link Removed], which was fixed back in 4.16
Source Context
384 /** 385 * Assignment operator. First deletes all currently contained elements 386 * and then copies from other array. 387 * 388 * @param Other The source array to assign from. 389 */ 390 TArray& operator=(const TArray& Other) 391 { 392 if (this != &Other) 393 { 394 DestructItems(GetData(), ArrayNum); 395 ***** CopyToEmpty(Other.GetData(), Other.Num(), ArrayMax, 0); 396 } 397 return *this; 398 }
repro steps currently unknown
Access violation - code c0000005 (first/second chance not available) UE4Editor_Core!TArray<wchar_t,FDefaultAllocator>::operator=() [array.h:396] UE4Editor_Core!FString::operator=() [unrealstring.h:1802] UE4Editor_UnrealEd!UActorFactoryStaticMesh::PostSpawnActor() [actorfactory.cpp:365] UE4Editor_UnrealEd!UActorFactory::CreateActor() [actorfactory.cpp:269] UE4Editor_UnrealEd!PrivateAddActor() [assetselection.cpp:480] UE4Editor_UnrealEd!FActorFactoryAssetProxy::AddActorForAsset() [assetselection.cpp:693] UE4Editor_UnrealEd!FLevelEditorViewportClient::TryPlacingActorFromObject() [leveleditorviewport.cpp:283] UE4Editor_UnrealEd!FLevelEditorViewportClient::DropObjectsOnActor() [leveleditorviewport.cpp:867] UE4Editor_UnrealEd!FLevelEditorViewportClient::DropObjectsAtCoordinates() [leveleditorviewport.cpp:1301] UE4Editor_LevelEditor!SLevelViewport::HandlePlaceDraggedObjects() [slevelviewport.cpp:813] UE4Editor_LevelEditor!SLevelViewport::OnDragEnter() [slevelviewport.cpp:482] UE4Editor_Slate!<lambda_f61e425f9587e96b799927cd214b1498>::operator() [slateapplication.cpp:5540] UE4Editor_Slate!FEventRouter::Route<FNoReply,FEventRouter::FBubblePolicy,FDragDropEvent,<lambda_f61e425f9587e96b799927cd214b1498> >() [slateapplication.cpp:234] UE4Editor_Slate!FSlateApplication::RoutePointerMoveEvent() [slateapplication.cpp:5534] UE4Editor_Slate!FSlateApplication::ProcessMouseMoveEvent() [slateapplication.cpp:5965] UE4Editor_Slate!FSlateApplication::OnMouseMove() [slateapplication.cpp:5899] UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1763] UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2171] UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:888] UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [windowsapplication.cpp:725] user32!UserCallWinProcCheckWow() user32!DispatchMessageWorker() UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [windowsplatformapplicationmisc.cpp:129] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3220] UE4Editor!GuardedMain() [launch.cpp:166] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134] UE4Editor!WinMain() [launchwindows.cpp:210] UE4Editor!__scrt_common_main_seh() [exe_common.inl:253] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-52620 in the post.