There is a crash that is occuring when resizing windows with the debug filter popped out. The Debug filter that gets popped out is persistant and does not disappear when the the in line option appears, and clicking on it causes the editor to crash. The repro steps use an animation blueprint, but this issue occurs wherever a debug filter is present. You can view the issue via the image attached.
Tested In
4.14.3 - CL 3249277
4.15.3 - CL 3450819
4.16.1 - CL 3466753
4.17 - CL 3505911
This issue does not appear to be a regression
Assertion failed: NewMenu.IsValid() && NewMenu->GetOwnedWindow().IsValid() [File:D:\Build\++UE4+Release-4.16+Compile\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SMenuAnchor.cpp] [Line: 379] UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349] UE4Editor_Slate!SMenuAnchor::SetIsOpen() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\widgets\input\smenuanchor.cpp:380] UE4Editor_Slate!SComboButton::OnButtonClicked() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\widgets\input\scombobutton.cpp:86] UE4Editor_Slate!SComboBox<TSharedPtr<FString,0> >::OnButtonClicked() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\public\widgets\input\scombobox.h:468] UE4Editor_Slate!TMemberFunctionCaller<SComboButton,FReply (__cdecl SComboButton::*)(void) __ptr64>::operator()<>() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\public\delegates\delegateinstanceinterface.h:165] UE4Editor_Slate!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SComboButton,FReply (__cdecl SComboButton::*)(void) __ptr64> >() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\public\templates\tuple.h:497] UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SComboButton,0,FReply __cdecl(void)>::Execute() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327] UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:537] UE4Editor_Slate!SButton::OnMouseButtonDown() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:215] UE4Editor_Slate!<lambda_7097b900f0e4be30d80fb18f98c51ea0>::operator()() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4953] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_7097b900f0e4be30d80fb18f98c51ea0> >() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:239] UE4Editor_Slate!FSlateApplication::RoutePointerDownEvent() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4942] UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDownEvent() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4898] UE4Editor_Slate!FSlateApplication::OnMouseDown() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4816] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1712] UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:2127] UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:867] UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:714] user32 user32 UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:1009] UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3058] UE4Editor!GuardedMain() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\launch.cpp:166] UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134] UE4Editor!WinMain() [d:\build\++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210] UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253] kernel32 ntdll
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