[CrashReport] Mac crash - UE4Editor-Slate.dylib!SMenuAnchor::SetIsOpen()

[2017.09.07-18.54.57:515][687]PIE: Play in editor start time for /Game/UEDPIE_0_default -0.161
[2017.09.07-18.55.28:260][632]LogRenderer: Reallocating scene render targets to support 1380x824 Format 10 NumSamples 1 (Frame:2138).
[2017.09.07-18.55.28:410][633]LogRenderer: Reallocating scene render targets to support 1440x876 Format 10 NumSamples 1 (Frame:2140).
[2017.09.07-18.56.14:184][611]Cmd: SELECT NONE
[2017.09.07-18.58.22:875][237]Cmd: SELECT NONE
[2017.09.07-18.58.27:341][319]LogMac: Error: appError called: Assertion failed: Assertion failed: NewMenu.IsValid() && NewMenu->GetOwnedWindow().IsValid() [File:/Users/build/Build/++UE4+Release-4.17+Compile/Sync/Engine/Source/Runtime/Slate/Private/Widgets/Input/SMenuAnchor.cpp] [Line: 374] 


[2017.09.07-18.58.27:441][319]LogMac: === Critical error: ===
SIGSEGV: invalid attempt to access memory at address 0x3

[2017.09.07-18.58.27:441][319]LogMac: FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x422fadb  (filename not found) [in UE4Editor-Core.dylib]
FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x444708f  (filename not found) [in UE4Editor-Core.dylib]
FOutputDevice::Logf(wchar_t const*, ...) Address = 0x452d8fd  (filename not found) [in UE4Editor-Core.dylib]
FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...) Address = 0x44807ce  (filename not found) [in UE4Editor-Core.dylib]
SMenuAnchor::SetIsOpen(bool, bool, int) Address = 0xb882f21  (filename not found) [in UE4Editor-Slate.dylib]
SEditorViewportToolbarMenu::OnMenuClicked() Address = 0xd731d84  (filename not found) [in UE4Editor-UnrealEd.dylib]
TBaseSPMethodDelegateInstance<false, SEditorViewportToolbarMenu, (ESPMode)0, FReply ()>::Execute() const Address = 0xd8213b1  (filename not found) [in UE4Editor-UnrealEd.dylib]
SButton::OnMouseButtonDown(FGeometry const&, FPointerEvent const&) Address = 0xb85d21c  (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::RoutePointerDownEvent(FWidgetPath&, FPointerEvent&) Address = 0xb6132b1  (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::ProcessMouseButtonDownEvent(TSharedPtr<FGenericWindow, (ESPMode)0> const&, FPointerEvent&) Address = 0xb5b0ca2  (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::OnMouseDown(TSharedPtr<FGenericWindow, (ESPMode)0> const&, EMouseButtons::Type, FVector2D) Address = 0xb611abb  (filename not found) [in UE4Editor-Slate.dylib]
FMacApplication::ProcessMouseDownEvent(FDeferredMacEvent const&, TSharedPtr<FMacWindow, (ESPMode)0>) Address = 0x44174e9  (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::ProcessEvent(FDeferredMacEvent const&) Address = 0x440d9cb  (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::ProcessDeferredEvents(float) Address = 0x440b7bf  (filename not found) [in UE4Editor-Core.dylib]
FSlateApplication::TickPlatform(float) Address = 0xb5e166b  (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::Tick(ESlateTickType) Address = 0xb5e0aa4  (filename not found) [in UE4Editor-Slate.dylib]
FEngineLoop::Tick() Address = 0x412a011  (filename not found) [in UE4Editor]
GuardedMain(wchar_t const*) Address = 0x4130c22  (filename not found) [in UE4Editor]
-[UE4AppDelegate runGameThread:] Address = 0x413e5d0  (filename not found) [in UE4Editor]
-[FCocoaGameThread main] Address = 0x4402cc6  (filename not found) [in UE4Editor-Core.dylib]
__NSThread__start__() Address = 0xaed1a8ad (filename not found) [in Foundation]
_pthread_body() Address = 0xc2c9093b (filename not found) [in libsystem_pthread.dylib]
_pthread_body() Address = 0xc2c90887 (filename not found) [in libsystem_pthread.dylib]
thread_start() Address = 0xc2c9008d (filename not found) [in libsystem_pthread.dylib]

SEGV_MAPERR at 0x3

UE4Editor-Slate.dylib!SMenuAnchor::SetIsOpen()
UE4Editor-UnrealEd.dylib!SEditorViewportToolbarMenu::OnMenuClicked()
UE4Editor-UnrealEd.dylib!TBaseSPMethodDelegateInstance<false, SEditorViewportToolbarMenu, (ESPMode)0, FReply ()>::Execute()
UE4Editor-Slate.dylib!SButton::OnMouseButtonDown()
UE4Editor-Slate.dylib!FSlateApplication::RoutePointerDownEvent()
UE4Editor-Slate.dylib!FSlateApplication::ProcessMouseButtonDownEvent(TSharedPtr<FGenericWindow,()
UE4Editor-Slate.dylib!FSlateApplication::OnMouseDown(TSharedPtr<FGenericWindow,()
UE4Editor-Core.dylib!FMacApplication::ProcessMouseDownEvent(FDeferredMacEvent const&, TSharedPtr<FMacWindow,()
UE4Editor-Core.dylib!FMacApplication::ProcessEvent()
UE4Editor-Core.dylib!FMacApplication::ProcessDeferredEvents()
UE4Editor-Slate.dylib!FSlateApplication::TickPlatform()
UE4Editor-Slate.dylib!FSlateApplication::Tick()
UE4Editor!FEngineLoop::Tick()
UE4Editor!GuardedMain()
UE4Editor!<Unknown>
UE4Editor-Core.dylib!<Unknown>
Foundation!Unknown()
libsystem_pthread.dylib!<Unknown>
libsystem_pthread.dylib!<Unknown>
libsystem_pthread.dylib!<Unknown>