Crash on 4.15 in Child Animation Blueprint

Hello,

When I create a function in child animation UE 4.15 crash with next log

LoginId:7114a693db4ff7b66b479eae376fbfa1
EpicAccountId:f2ccf5805f9248d29b6d5843ca101899

SEGV_MAPERR at 0x3

FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x10b8bb44b (filename not found) [in UE4Editor-Core.dylib]
FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x10ba802d8 (filename not found) [in UE4Editor-Core.dylib]
FOutputDevice::Logf(wchar_t const*, …) Address = 0x10bb62197 (filename not found) [in UE4Editor-Core.dylib]
FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, …) Address = 0x10badb196 (filename not found) [in UE4Editor-Core.dylib]
FAnimBlueprintCompiler::PostCompile() Address = 0x12369ba08 (filename not found) [in UE4Editor-KismetCompiler.dylib]
FKismetCompilerContext::Compile() Address = 0x1236d6399 (filename not found) [in UE4Editor-KismetCompiler.dylib]
FKismet2CompilerModule::CompileBlueprintInner(UBlueprint*, FKismetCompilerOptions const&, FCompilerResultsLog&, TSharedPtr, TArray*) Address = 0x1236eae0e (filename not found) [in UE4Editor-KismetCompiler.dylib]
FKismet2CompilerModule::CompileBlueprint(UBlueprint*, FKismetCompilerOptions const&, FCompilerResultsLog&, TSharedPtr, TArray*) Address = 0x1236edc5a (filename not found) [in UE4Editor-KismetCompiler.dylib]
FBlueprintEditorUtils::MarkBlueprintAsStructurallyModified(UBlueprint*) Address = 0x112f4af69 (filename not found) [in UE4Editor-UnrealEd.dylib]
void FBlueprintEditorUtils::AddFunctionGraph(UBlueprint*, UEdGraph*, bool, UClass*) Address = 0x119cf2c66 (filename not found) [in UE4Editor-Kismet.dylib]
FBlueprintEditor::NewDocument_OnClicked(FBlueprintEditor::ECreatedDocumentType) Address = 0x119db6194 (filename not found) [in UE4Editor-Kismet.dylib]
TBaseSPMethodDelegateInstance (), FBlueprintEditor::ECreatedDocumentType>::Execute() const Address = 0x119ebd55e (filename not found) [in UE4Editor-Kismet.dylib]
TBaseSPMethodDelegateInstance::ExecuteIfSafe() const Address = 0x119ebd5fb (filename not found) [in UE4Editor-Kismet.dylib]
FUICommandList::ExecuteAction(TSharedRef) const Address = 0x1115ae66d (filename not found) [in UE4Editor-Slate.dylib]
SMyBlueprint::OnAddButtonClickedOnSection(int) Address = 0x11a31ddd7 (filename not found) [in UE4Editor-Kismet.dylib]
TBaseSPMethodDelegateInstance::Execute() const Address = 0x11a40dd84 (filename not found) [in UE4Editor-Kismet.dylib]
SButton::OnMouseButtonUp(FGeometry const&, FPointerEvent const&) Address = 0x1117c5f3a (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::RoutePointerUpEvent(FWidgetPath&, FPointerEvent&) Address = 0x11157f06d (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::ProcessMouseButtonUpEvent(FPointerEvent&) Address = 0x1115231ae (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::OnMouseUp(EMouseButtons::Type, FVector2D) Address = 0x111587b4a (filename not found) [in UE4Editor-Slate.dylib]
FMacApplication::ProcessEvent(FDeferredMacEvent const&) Address = 0x10ba16d8f (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::ProcessDeferredEvents(float) Address = 0x10ba14d3f (filename not found) [in UE4Editor-Core.dylib]
FSlateApplication::TickPlatform(float) Address = 0x11154cab5 (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::Tick() Address = 0x11154bfab (filename not found) [in UE4Editor-Slate.dylib]
FEngineLoop::Tick() Address = 0x10b0e75fc (filename not found) [in UE4Editor]
GuardedMain(wchar_t const*) Address = 0x10b0edba2 (filename not found) [in UE4Editor]
-[UE4AppDelegate runGameThread:] Address = 0x10b0fb53c (filename not found) [in UE4Editor]
-[FCocoaGameThread main] Address = 0x10ba0c366 (filename not found) [in UE4Editor-Core.dylib]
Unknown() Address = 0x7fffa1569c6d (filename not found) [in Foundation]
_pthread_body Address = 0x7fffb52b3aab (filename not found) [in libsystem_pthread.dylib]
_pthread_body Address = 0x7fffb52b39f7 (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fffb52b31fd (filename not found) [in libsystem_pthread.dylib]

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