This is a trending crash in the 4.17 preview.
This is a regression
Broken: 4.17.0-3528061
Worked: 4.16.2-3514769
User Descriptions
RESULT: Crash
Assertion failed: false [File:D:\Build\++UE4+Release-4.17+Compile\Sync\Engine\Source\Runtime\Slate\Public\Widgets/Views/SListView.h] [Line: 617] SListView<OptionType> [SMultipleOptionTable.h(195)] detected a critical error. See diagnostic dump above. Provide a custom 'OnItemToString_Debug' for more detailed diagnostics. UE4Editor_UnrealEd!SListView<TSharedPtr<FCulture,1> >::FWidgetGenerator::ValidateWidgetGeneration() [slistview.h:617] UE4Editor_UnrealEd!SListView<TSharedPtr<FCulture,1> >::FWidgetGenerator::OnEndGenerationPass() [slistview.h:536] UE4Editor_UnrealEd!SListView<TSharedPtr<FCulture,1> >::ReGenerateItems() [slistview.h:986] UE4Editor_Slate!STableViewBase::Tick() [stableviewbase.cpp:249] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:859] UE4Editor_Slate!SBox::OnPaint() [sbox.cpp:245] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_Slate!SBox::OnPaint() [sbox.cpp:245] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_Slate!SSplitter::OnPaint() [ssplitter.cpp:167] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35] UE4Editor_Slate!SBorder::OnPaint() [sborder.cpp:85] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35] UE4Editor_Slate!SBorder::OnPaint() [sborder.cpp:85] UE4Editor_PropertyEditor!STableRow<TSharedPtr<IDetailTreeNode,0> >::OnPaint() [stablerow.h:239] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35] UE4Editor_Slate!STableViewBase::OnPaint() [stableviewbase.cpp:633] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SOverlay::OnPaint() [soverlay.cpp:97] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SOverlay::OnPaint() [soverlay.cpp:97] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [spanel.cpp:31] UE4Editor_SlateCore!SPanel::OnPaint() [spanel.cpp:12] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885] UE4Editor_SlateCore!SCompoundWidget::OnPaint() [scompoundwidget.cpp:35] UE4Editor_Slate!SBorder::OnPaint() [sborder.cpp:85] UE4Editor_SlateCore!SWidget::Paint() [swidget.cpp:885]
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-47603 in the post.