While working on a UMG blueprint, whenever I try to compile it after adding a combo box to it, the editor crashes immediately. I’m using a vanilla GitHub build with no modifications.
Here’s my crash log…
[2016.06.03-13.55.55:543][952]LogWindows:Error: === Critical error: ===
Fatal error!
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000008
UE4Editor-CoreUObject.dll!StaticDuplicateObject() [d:\ue4\release\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1758]
UE4Editor-UMG.dll!UWidgetBlueprintGeneratedClass::InitializeWidgetStatic() [d:\ue4\release\engine\source\runtime\umg\private\widgetblueprintgeneratedclass.cpp:33]
UE4Editor-UMG.dll!UWidgetBlueprintGeneratedClass::InitializeWidget() [d:\ue4\release\engine\source\runtime\umg\private\widgetblueprintgeneratedclass.cpp:155]
UE4Editor-UMG.dll!UUserWidget::Initialize() [d:\ue4\release\engine\source\runtime\umg\private\userwidget.cpp:80]
UE4Editor-CoreUObject.dll!StaticDuplicateObjectEx() [d:\ue4\release\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1937]
UE4Editor-CoreUObject.dll!StaticDuplicateObject() [d:\ue4\release\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1794]
UE4Editor-UnrealEd.dll!FBlueprintCompileReinstancer::FBlueprintCompileReinstancer() [d:\ue4\release\engine\source\editor\unrealed\private\kismet2\kismetreinstanceutilities.cpp:163]
UE4Editor-UnrealEd.dll!FBlueprintCompileReinstancer::Create() [d:\ue4\release\engine\source\editor\unrealed\public\kismet2\kismetreinstanceutilities.h:100]
UE4Editor-UnrealEd.dll!FKismetEditorUtilities::RecompileBlueprintBytecode() [d:\ue4\release\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:918]
UE4Editor-UnrealEd.dll!FBlueprintCompileReinstancer::ReinstanceObjects() [d:\ue4\release\engine\source\editor\unrealed\private\kismet2\kismetreinstanceutilities.cpp:721]
UE4Editor-UnrealEd.dll!FKismetEditorUtilities::CompileBlueprint() [d:\ue4\release\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:797]
UE4Editor-Kismet.dll!FBlueprintEditor::Compile() [d:\ue4\release\engine\source\editor\kismet\private\blueprinteditor.cpp:3184]
UE4Editor-Kismet.dll!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl(void)>::Execute() [d:\ue4\release\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:321]
UE4Editor-Kismet.dll!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl(void)>::ExecuteIfSafe() [d:\ue4\release\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:427]
UE4Editor-Slate.dll!FUICommandList::ExecuteAction() [d:\ue4\release\engine\source\runtime\slate\private\framework\commands\uicommandlist.cpp:87]
UE4Editor-Slate.dll!SToolBarButtonBlock::OnClicked() [d:\ue4\release\engine\source\runtime\slate\private\framework\multibox\stoolbarbuttonblock.cpp:300]
UE4Editor-Slate.dll!TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64>::operator()<>() [d:\ue4\release\engine\source\runtime\core\public\delegates\delegateinstanceinterface_variadics.h:161]
UE4Editor-Slate.dll!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter_ExplicitReturnType<FReply,TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64> >() [d:\ue4\release\engine\source\runtime\core\public\delegates\tuple.h:128]
UE4Editor-Slate.dll!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl(void)>::Execute() [d:\ue4\release\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:321]
UE4Editor-Slate.dll!TBaseDelegate<FReply>::Execute() [d:\ue4\release\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:521]
UE4Editor-Slate.dll!SButton::OnMouseButtonUp() [d:\ue4\release\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:275]
UE4Editor-Slate.dll!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator()() [d:\ue4\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4598]
UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [d:\ue4\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:215]
UE4Editor-Slate.dll!FSlateApplication::RoutePointerUpEvent() [d:\ue4\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4587]
UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonUpEvent() [d:\ue4\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5041]
UE4Editor-Slate.dll!FSlateApplication::OnMouseUp() [d:\ue4\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5021]
UE4Editor-Core.dll!FWindowsApplication::ProcessDeferredMessage() [d:\ue4\release\engine\source\runtime\core\private\windows\windowsapplication.cpp:1507]
UE4Editor-Core.dll!FWindowsApplication::DeferMessage() [d:\ue4\release\engine\source\runtime\core\private\windows\windowsapplication.cpp:1847]
UE4Editor-Core.dll!FWindowsApplication::ProcessMessage() [d:\ue4\release\engine\source\runtime\core\private\windows\windowsapplication.cpp:742]
UE4Editor-Core.dll!FWindowsApplication::AppWndProc() [d:\ue4\release\engine\source\runtime\core\private\windows\windowsapplication.cpp:664]
USER32.dll
USER32.dll
UE4Editor-Core.dll!FWindowsPlatformMisc::PumpMessages() [d:\ue4\release\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:903]
UE4Editor.exe!FEngineLoop::Tick() [d:\ue4\release\engine\source\runtime\launch\private\launchengineloop.cpp:2728]
UE4Editor.exe!GuardedMain() [d:\ue4\release\engine\source\runtime\launch\private\launch.cpp:148]
UE4Editor.exe!GuardedMainWrapper() [d:\ue4\release\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor.exe!WinMain() [d:\ue4\release\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
KERNEL32.DLL
ntdll.dll
ntdll.dll