[=;441918]
First detected (sorry guys, Answerhub still doesn’t work for me).
Created a C++ project, loaded the engine in DevelopmentEditor. Created and opened a new UMG widget. Close the whole editor while the UMG editor is open, without saving the widget and NOT by ‘Stopping’ in Visual - get a here (Line 395, SlateApplicationBase.h)
static FSlateApplicationBase& Get( )
{
checkSlow(IsThreadSafeForSlateRendering());
return *CurrentBaseApplication;
}
I can repro this reliably.
This has now been reported as UE-24757, and we will begin investigating the issue to get a fix in place as soon as we are able.