Description

This is a trending crash coming out of the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred.

Source Context

 144       	{
  145       		NewLandscape_ClampSize();
  146       	}
  147       
  148       	if (PropertyChangedEvent.MemberProperty == nullptr ||
  149       		PropertyChangedEvent.MemberProperty->GetFName() == GET_MEMBER_NAME_CHECKED(ULandscapeEditorObject, ResizeLandscape_QuadsPerSection) ||
  150       		PropertyChangedEvent.MemberProperty->GetFName() == GET_MEMBER_NAME_CHECKED(ULandscapeEditorObject, ResizeLandscape_SectionsPerComponent) ||
  151       		PropertyChangedEvent.MemberProperty->GetFName() == GET_MEMBER_NAME_CHECKED(ULandscapeEditorObject, ResizeLandscape_ConvertMode))
  152       	{
  153       		UpdateComponentCount();
  154       	}
  155       
  156       	if (PropertyChangedEvent.MemberProperty == nullptr ||
  157 ***** 		PropertyChangedEvent.MemberProperty->GetFName() == GET_MEMBER_NAME_CHECKED(ULandscapeEditorObject, NewLandscape_Material) ||
  158       		PropertyChangedEvent.MemberProperty->GetFName() == GET_MEMBER_NAME_CHECKED(ULandscapeEditorObject, ImportLandscape_HeightmapFilename))
  159       	{
  160       		RefreshImportLayersList();
  161       	}
  162       
  163       	if (PropertyChangedEvent.MemberProperty == nullptr ||
  164       		PropertyChangedEvent.MemberProperty->GetFName() == GET_MEMBER_NAME_CHECKED(ULandscapeEditorObject, PaintingRestriction))
  165       	{
  166       		UpdateComponentLayerWhitelist();
  167       	}
Steps to Reproduce

repro steps currently unknown

Callstack
Assertion failed: 0 [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Editor\LandscapeEditor\Public\LandscapeEditorObject.h] [Line: 663]

UE4Editor_LandscapeEditor!ULandscapeEditorObject::PostEditChangeProperty() [landscapeeditorobject.cpp:158]
UE4Editor_CoreUObject!UObject::PostEditChangeChainProperty() [obj.cpp:436]
UE4Editor_PropertyEditor!FPropertyNode::NotifyPostChange() [propertynode.cpp:2380]
UE4Editor_PropertyEditor!FPropertyValueImpl::ImportText() [propertyhandleimpl.cpp:570]
UE4Editor_PropertyEditor!FPropertyValueImpl::ImportText() [propertyhandleimpl.cpp:358]
UE4Editor_PropertyEditor!FPropertyValueImpl::SetValueAsString() [propertyhandleimpl.cpp:857]
UE4Editor_PropertyEditor!SPropertyEditorCombo::SendToObjects() [spropertyeditorcombo.cpp:252]
UE4Editor_PropertyEditor!SPropertyEditorCombo::OnComboSelectionChanged() [spropertyeditorcombo.cpp:192]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyEditorCombo,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyEditorCombo,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_PropertyEditor!TBaseDelegate<void,TSharedPtr<FString,0>,enum ESelectInfo::Type>::ExecuteIfBound() [delegatesignatureimpl.inl:624]
UE4Editor_PropertyEditor!SPropertyComboBox::OnSelectionChangedInternal() [spropertycombobox.cpp:114]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyComboBox,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyComboBox,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_PropertyEditor!TBaseDelegate<void,TSharedPtr<FString,0>,enum ESelectInfo::Type>::ExecuteIfBound() [delegatesignatureimpl.inl:624]
UE4Editor_PropertyEditor!SComboBox<TSharedPtr<FString,0> >::OnSelectionChanged_Internal() [scombobox.h:455]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SComboBox<TSharedPtr<FString,0> >,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SComboBox<TSharedPtr<FString,0> >,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_PropertyEditor!TBaseDelegate<void,TSharedPtr<FString,0>,enum ESelectInfo::Type>::ExecuteIfBound() [delegatesignatureimpl.inl:624]
UE4Editor_PropertyEditor!SListView<TSharedPtr<FString,0> >::Private_SignalSelectionChanged() [slistview.h:725]
UE4Editor_PropertyEditor!STableRow<TSharedPtr<FString,0> >::OnMouseButtonUp() [stablerow.h:474]
UE4Editor_Slate!<lambda_1002768c627006711ef2f351a87ec0e7>::operator() [slateapplication.cpp:5263]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_1002768c627006711ef2f351a87ec0e7> >() [slateapplication.cpp:234]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:5252]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5750]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5730]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1725]
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()

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Fixed
ComponentTools - Landscape
Affects Versions4.18
Target Fix4.19
Fix Commit3729935
Main Commit3739980
Release Commit3813083
CreatedOct 27, 2017
ResolvedNov 1, 2017
UpdatedApr 27, 2018