Rearranging Slate Brushes causes crash

Rearranging the order of a Slate Brush array causes the editor to crash.

Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053647), 4.23 (CL - 7305105), 4.24 (CL - 7285696)

1. Download the attached project
2. Create a Blueprint instance of the MyUserWidget class
3. Add 4 elements to the Brushes array
4. Drag element 2 to element 3

Expected: The elements swap positions on the array

Result: The Editor crashes

LoginId:4828906544755feeb3091eb96682b66a
EpicAccountId:09beab8e986143689ef53ab4528441ec

Access violation - code c0000005 (first/second chance not available)

UE4Editor_SlateCore!FSlateBrush::operator=()
UE4Editor_DetailCustomizations!SSlateBrushStaticPreview::Tick() [d:\build\++ue4\sync\engine\source\editor\detailcustomizations\private\slatebrushcustomization.cpp:1027]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1003]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_Slate!SBox::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sbox.cpp:306]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_Slate!SSplitter::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_Slate!SBorder::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:87]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_Slate!SBorder::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:87]
UE4Editor_PropertyEditor!STableRow<TSharedPtr<FDetailTreeNode,0> >::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\public\widgets\views\stablerow.h:261]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_Slate!STableViewBase::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\views\stableviewbase.cpp:648]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_Slate!SBox::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sbox.cpp:306]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_Slate!SBorder::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:87]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_Slate!SBorder::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:87]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_Slate!SSplitter::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_Slate!SBorder::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:87]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_Slate!SSplitter::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWindow::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swindow.cpp:1927]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1037]
UE4Editor_Slate!FSlateApplication::DrawWindowAndChildren() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1322]
UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1577]
UE4Editor_Slate!FSlateApplication::DrawWindows() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1279]
UE4Editor_Slate!FSlateApplication::TickApplication() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1862]
UE4Editor_Slate!FSlateApplication::Tick() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1693]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3799]
UE4Editor!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:174]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:145]
UE4Editor!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:276]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283]
kernel32
ntdll