Description

This is a trending crash coming out of the 4.18 release, and may be a regression. Users have not provided any descriptions of their actions when the crash occurred.

Source Context

  361       					// "Normal" menus are created and managed by the application's menu stack functions
  362       					if (bUseApplicationMenuStack)
  363       					{
  364       						if (MethodInUse.GetPopupMethod() == EPopupMethod::CreateNewWindow)
  365       						{
  366       							// Open the pop-up
  367       							TSharedPtr<IMenu> NewMenu = FSlateApplication::Get().PushMenu(AsShared(), MyWidgetPath, MenuContentRef, NewPosition, TransitionEffect, bFocusMenu, MyGeometry.GetLocalSize(), MethodInUse.GetPopupMethod(), bIsCollapsedByParent);
  368       
  369       							PopupMenuPtr = NewMenu;
  370       							check(NewMenu.IsValid() && NewMenu->GetOwnedWindow().IsValid());
  371 ***** 							NewMenu->GetOnMenuDismissed().AddSP(this, &SMenuAnchor::OnMenuClosed);
  372       							PopupWindowPtr = NewMenu->GetOwnedWindow();
  373       						}
  374       						else
  375       						{
  376       							// We are re-using the current window instead of creating a new one.
  377       							// The popup will be presented as a child of this widget.
  378       							ensure(MethodInUse.GetPopupMethod() == EPopupMethod::UseCurrentWindow);
  379       							PopupWindowPtr = MyWidgetPath.GetWindow();
  380       
  381       							if (bFocusMenu)
  382       							{
  383       								FSlateApplication::Get().ReleaseMouseCaptureForUser(FocusUserIndex);
  384       							}
  385       
  386       							TSharedRef<SMenuAnchor> SharedThis = StaticCastSharedRef<SMenuAnchor>(AsShared());
Steps to Reproduce

repro steps currently unknown

Callstack
Assertion failed: NewMenu.IsValid() && NewMenu->GetOwnedWindow().IsValid() 
[File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SMenuAnchor.cpp] [Line: 371]

UE4Editor_Slate!SMenuAnchor::SetIsOpen() [smenuanchor.cpp:372]
UE4Editor_Slate!SComboButton::OnButtonClicked() [scombobutton.cpp:86]
UE4Editor_Slate!TMemberFunctionCaller<SComboButton,FReply() [delegateinstanceinterface.h:165]
UE4Editor_Slate!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SComboButton,FReply() [tuple.h:497]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SComboButton,0,FReply __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:537]
UE4Editor_Slate!SButton::OnMouseButtonDown() [sbutton.cpp:215]
UE4Editor_Slate!<lambda_7097b900f0e4be30d80fb18f98c51ea0>::operator() [slateapplication.cpp:5171]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_7097b900f0e4be30d80fb18f98c51ea0> >() [slateapplication.cpp:234]
UE4Editor_Slate!FSlateApplication::RoutePointerDownEvent() [slateapplication.cpp:5160]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDownEvent() [slateapplication.cpp:5113]
UE4Editor_Slate!FSlateApplication::OnMouseDown() [slateapplication.cpp:5031]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1733]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2171]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:888]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [windowsapplication.cpp:725]
user32!UserCallWinProcCheckWow()
user32!DispatchMessageWorker()
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [windowsplatformapplicationmisc.cpp:129]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3220]
UE4Editor!GuardedMain() [launch.cpp:166]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134]
UE4Editor!WinMain() [launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:253]
kernel32!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()

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Backlogged
ComponentTools - Slate
Affects Versions4.184.194.204.214.22
CreatedNov 2, 2017
UpdatedNov 11, 2019