If you duplicate an asset in the Content Browser before the renaming box prompts input it will cause the Editor to crash.
This was reported and tested in 4.20.3 (CL-4369336). This is reproducible in 4.19.2 (CL-4033788) and Main 4.21 (CL-4399560)
Results: It will create a copy of the asset and then it crash.
Expected: Should not crash
[2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff592e50d8 KERNELBASE.dll!UnknownFunction [] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff38f76850 UE4Editor-ApplicationCore.dll!FWindowsErrorOutputDevice::Serialize() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowserroroutputdevice.cpp:65] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff03d362fc UE4Editor-Core.dll!FOutputDevice::LogfImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:70] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff03cc51db UE4Editor-Core.dll!FDebug::AssertFailed() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:425] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007ffef116c07b UE4Editor-ContentBrowser.dll!SAssetView::AssetRenameBegin() [d:\build\++ue4\sync\engine\source\editor\contentbrowser\private\sassetview.cpp:4138] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007ffef11bd7b9 UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetView,0,void __cdecl(TSharedPtr<FAssetViewItem,0> const & __ptr64,FString const & __ptr64,FSlateRect const & __ptr64)>::ExecuteIfSafe() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:345] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007ffef10d9012 UE4Editor-ContentBrowser.dll!SAssetViewItem::HandleBeginNameChange() [d:\build\++ue4\sync\engine\source\editor\contentbrowser\private\assetviewwidgets.cpp:554] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007ffef10bdb99 UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetTileItem,0,void __cdecl(FText const & __ptr64)>::ExecuteIfSafe() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:345] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff03826aa7 UE4Editor-Slate.dll!SInlineEditableTextBlock::EnterEditingMode() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\text\sinlineeditabletextblock.cpp:126] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007ffef10be018 UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SInlineEditableTextBlock,0,void __cdecl(void)>::ExecuteIfSafe() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:345] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007ffef1240521 UE4Editor-ContentBrowser.dll!SAssetView::Tick() [d:\build\++ue4\sync\engine\source\editor\contentbrowser\private\sassetview.cpp:1111] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8de9d UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1060] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ca04 UE4Editor-SlateCore.dll!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff0384efcd UE4Editor-Slate.dll!SBorder::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:87] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:248][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff0385438e UE4Editor-Slate.dll!SSplitter::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ca04 UE4Editor-SlateCore.dll!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff0384f266 UE4Editor-Slate.dll!SBox::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sbox.cpp:306] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff0384efcd UE4Editor-Slate.dll!SBorder::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:87] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c8a6 UE4Editor-SlateCore.dll!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ca04 UE4Editor-SlateCore.dll!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff0385438e UE4Editor-Slate.dll!SSplitter::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c8a6 UE4Editor-SlateCore.dll!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ca04 UE4Editor-SlateCore.dll!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:249][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff0384efcd UE4Editor-Slate.dll!SBorder::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:87] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c8a6 UE4Editor-SlateCore.dll!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ca04 UE4Editor-SlateCore.dll!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff0385438e UE4Editor-Slate.dll!SSplitter::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c8a6 UE4Editor-SlateCore.dll!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ca04 UE4Editor-SlateCore.dll!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ec31 UE4Editor-SlateCore.dll!SPanel::PaintArrangedChildren() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8ca04 UE4Editor-SlateCore.dll!SPanel::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c8a6 UE4Editor-SlateCore.dll!SOverlay::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:95] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8c289 UE4Editor-SlateCore.dll!SCompoundWidget::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8caaa UE4Editor-SlateCore.dll!SWindow::OnPaint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swindow.cpp:1903] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff04c8e063 UE4Editor-SlateCore.dll!SWidget::Paint() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:1090] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff035ed5bc UE4Editor-Slate.dll!FSlateApplication::DrawWindowAndChildren() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1325] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff03623783 UE4Editor-Slate.dll!FSlateApplication::PrivateDrawWindows() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1568] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff035ee7cf UE4Editor-Slate.dll!FSlateApplication::DrawWindows() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1285] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff0364f010 UE4Editor-Slate.dll!FSlateApplication::TickApplication() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1860] [2018.09.27-18.26.29:250][ 98]LogWindows: Error: [Callstack] 0x00007fff0364dd17 UE4Editor-Slate.dll!FSlateApplication::Tick() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1687] [2018.09.27-18.26.29:251][ 98]LogWindows: Error: [Callstack] 0x00007ff6cd3a6aa7 UE4Editor.exe!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3574] [2018.09.27-18.26.29:251][ 98]LogWindows: Error: [Callstack] 0x00007ff6cd3b5b3c UE4Editor.exe!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:166] [2018.09.27-18.26.29:251][ 98]LogWindows: Error: [Callstack] 0x00007ff6cd3b5bba UE4Editor.exe!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:144] [2018.09.27-18.26.29:251][ 98]LogWindows: Error: [Callstack] 0x00007ff6cd3c3dac UE4Editor.exe!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:223] [2018.09.27-18.26.29:251][ 98]LogWindows: Error: [Callstack] 0x00007ff6cd3c5aaa UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283] [2018.09.27-18.26.29:251][ 98]LogWindows: Error: [Callstack] 0x00007fff5aaf1fe4 KERNEL32.DLL!UnknownFunction [] [2018.09.27-18.26.29:251][ 98]LogWindows: Error: [Callstack] 0x00007fff5c71cb31 ntdll.dll!UnknownFunction []
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-64525 in the post.