[CrashReport] UE4Editor_UnrealEd!UEditorBrushBuilder::EndBrush() [editorbrushbuilder.cpp:53]

   48       bool UEditorBrushBuilder::EndBrush( UWorld* InWorld, ABrush* InBrush )
   49       {
   50       	//!!validate
   51       	check( InWorld != nullptr );
   52 ***** 	ABrush* BuilderBrush = (InBrush != nullptr) ? InBrush : InWorld->GetDefaultBrush();
   53       
   54       	// Ensure the builder brush is unhidden.
   55       	BuilderBrush->bHidden = false;
   56       	BuilderBrush->bHiddenEdLayer = false;

Assertion failed: InWorld != nullptr [File:D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\EditorBrushBuilder.cpp] [Line: 52]

UE4Editor_UnrealEd!UEditorBrushBuilder::EndBrush() [editorbrushbuilder.cpp:53]
UE4Editor_UnrealEd!UEditorBrushBuilder::PostEditChangeProperty() [editorbrushbuilder.cpp:260]
UE4Editor_CoreUObject!UObject::PostEditChange() [obj.cpp:334]
UE4Editor_UnrealEd!ImportObjectProperties() [editorobject.cpp:740]
UE4Editor_UnrealEd!ImportObjectProperties() [editorobject.cpp:815]
UE4Editor_UnrealEd!ImportProperties() [editorobject.cpp:589]
UE4Editor_UnrealEd!ImportObjectProperties() [editorobject.cpp:707]
UE4Editor_UnrealEd!ImportObjectProperties() [editorobject.cpp:815]
UE4Editor_UnrealEd!FCustomizableTextObjectFactory::ProcessBuffer() [editorfactories.cpp:4968]
UE4Editor_Sequencer!FSequencer::ImportObjectsFromText() [sequencer.cpp:5648]
UE4Editor_Sequencer!SSequencer::CanPaste() [ssequencer.cpp:2314]
UE4Editor_Sequencer!TBaseSPMethodDelegateInstance<0,SSequencer,0,bool __cdecl() [delegateinstancesimpl.h:269]
UE4Editor_Slate!FUICommandList::CanExecuteAction() [uicommandlist.cpp:111]
UE4Editor_Slate!SMenuEntryBlock::IsEnabled() [smenuentryblock.cpp:1083]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<1,SMenuEntryBlock,0,bool __cdecl() [delegateinstancesimpl.h:269]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SOverlay::OnPaint() [soverlay.cpp:95]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SOverlay::OnPaint() [soverlay.cpp:95]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35]
UE4Editor_Slate!SScrollBox::OnPaint() [sscrollbox.cpp:1024]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35]
UE4Editor_Slate!SBorder::OnPaint() [sborder.cpp:87]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1090]
UE4Editor_SlateCore!FSlateWindowElementList::FDeferredPaint::ExecutePaint() [drawelements.cpp:1018]
UE4Editor_SlateCore!FSlateWindowElementList::PaintDeferred() [drawelements.cpp:1043]
UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:1149]
UE4Editor_Slate!FSlateApplication::DrawWindowAndChildren() [slateapplication.cpp:1325]
UE4Editor_Slate!FSlateApplication::DrawWindowAndChildren() [slateapplication.cpp:1416]
UE4Editor_Slate!FSlateApplication::DrawWindowAndChildren() [slateapplication.cpp:1416]
UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() [slateapplication.cpp:1568]
UE4Editor_Slate!FSlateApplication::DrawWindows() [slateapplication.cpp:1285]
UE4Editor_Slate!FSlateApplication::TickApplication() [slateapplication.cpp:1860]
UE4Editor_Slate!FSlateApplication::Tick() [slateapplication.cpp:1687]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3574]
UE4Editor!GuardedMain() [launch.cpp:166]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:144]
UE4Editor!WinMain() [launchwindows.cpp:223]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:283]
kernel32!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()