Compiling blueprint with anim bp crashes editor in MathExpr exec

Compiling a player character blueprint that is tied to an anim bp crashes the editor.

Frequency: 2/2

Crashreporter: N/A

1. Download, unzip, open attached project
2. Open Content>Blueprints>Player>Ninja_BP
3. Press Compile

Results:

Editor freezes, then crashes

Expected:

Blueprint compiles

MachineId:4E82586D46B558EA69EF0EAA821297B1
EpicAccountId:2e342bbd0e92480fa71bf4505b6a81c3

Assertion failed: ((UObject*)ContainerPtr)->IsA((UClass*)GetOuter()) [Link Removed] [Line: 311]
'Ninja_Anim_BP_C_151' is of class 'Ninja_Anim_BP_C' however property 'FloatProperty_1238' belongs to class 'TRASHCLASS_Ninja_Anim_BP_123'

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\misc\outputdevice.cpp:430]
UE4Editor_CoreUObject!UObject::execInstanceVariable() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1208]
UE4Editor_Engine!UKismetMathLibrary::execLess_FloatFloat() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\classes\kismet\kismetmathlibrary.h:61]
UE4Editor_CoreUObject!UObject::execCallMathFunction() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:504]
UE4Editor_CoreUObject!UObject::execLetBool() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1789]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:775]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\coreuobject\private\uobject\class.cpp:4479]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1139]
UE4Editor_Engine!FExposedValueHandler::Execute() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:406]
UE4Editor_Engine!FAnimNode_StateMachine::FindValidTransition() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnode_statemachine.cpp:594]
UE4Editor_Engine!FAnimNode_StateMachine::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnode_statemachine.cpp:385]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_AnimGraphRuntime!FAnimNode_BlendListBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\animgraphruntime\private\animnodes\animnode_blendlistbase.cpp:168]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_AnimGraphRuntime!FAnimNode_Slot::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\animgraphruntime\private\animnodes\animnode_slot.cpp:42]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_AnimGraphRuntime!FAnimNode_LayeredBoneBlend::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\animgraphruntime\private\animnodes\animnode_layeredboneblend.cpp:65]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_AnimGraphRuntime!FAnimNode_LayeredBoneBlend::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\animgraphruntime\private\animnodes\animnode_layeredboneblend.cpp:65]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_AnimGraphRuntime!FAnimNode_SkeletalControlBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\animgraphruntime\private\bonecontrollers\animnode_skeletalcontrolbase.cpp:33]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_AnimGraphRuntime!FAnimNode_SkeletalControlBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\animgraphruntime\private\bonecontrollers\animnode_skeletalcontrolbase.cpp:33]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_AnimGraphRuntime!FAnimNode_SkeletalControlBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\animgraphruntime\private\bonecontrollers\animnode_skeletalcontrolbase.cpp:33]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_Engine!FPoseLinkBase::Update() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animnodebase.cpp:186]
UE4Editor_Engine!FAnimInstanceProxy::UpdateAnimationNode() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animinstanceproxy.cpp:35]
UE4Editor_Engine!FAnimInstanceProxy::UpdateAnimation() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animinstanceproxy.cpp:621]
UE4Editor_Engine!UAnimInstance::UpdateAnimation() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\animation\animinstance.cpp:389]
UE4Editor_Engine!USkeletalMeshComponent::TickAnimation() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:561]
UE4Editor_Engine!USkeletalMeshComponent::InitAnim() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:361]
UE4Editor_Engine!USkeletalMeshComponent::OnRegister() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:305]
UE4Editor_Engine!UActorComponent::ExecuteRegisterEvents() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\components\actorcomponent.cpp:1094]
UE4Editor_Engine!UActorComponent::RegisterComponentWithWorld() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\components\actorcomponent.cpp:871]
UE4Editor_Engine!AActor::IncrementalRegisterComponents() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\actor.cpp:3859]
UE4Editor_Engine!AActor::RegisterAllComponents() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\actor.cpp:3761]
UE4Editor_UnrealEd!FReinstanceFinalizer::Finalize() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\unrealed\private\kismet2\kismetreinstanceutilities.cpp:395]
UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReinstanceObjects() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\unrealed\private\kismet2\kismetreinstanceutilities.cpp:650]
UE4Editor_UnrealEd!FKismetEditorUtilities::CompileBlueprint() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:796]
UE4Editor_Kismet!FBlueprintEditor::Compile() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\kismet\private\blueprinteditor.cpp:3147]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl(void)>::Execute() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:321]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl(void)>::ExecuteIfSafe() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:427]
UE4Editor_Slate!FUICommandList::ExecuteAction() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slate\private\framework\commands\uicommandlist.cpp:87]
UE4Editor_Slate!SToolBarButtonBlock::OnClicked() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slate\private\framework\multibox\stoolbarbuttonblock.cpp:300]
UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64>::operator()<>() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\delegates\delegateinstanceinterface_variadics.h:161]
UE4Editor_Slate!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter_ExplicitReturnType<FReply,TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64> >() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\delegates\tuple.h:128]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl(void)>::Execute() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:321]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:521]
UE4Editor_Slate!SButton::OnMouseButtonUp() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:273]
UE4Editor_Slate!<lambda_9ed539f2a96fd1ccd6d2214174cc7705>::operator()() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4508]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_9ed539f2a96fd1ccd6d2214174cc7705> >() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:214]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4498]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4915]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4891]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\windows\windowsapplication.cpp:1407]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\windows\windowsapplication.cpp:1712]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\windows\windowsapplication.cpp:696]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\windows\windowsapplication.cpp:618]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:884]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\launch\private\launchengineloop.cpp:2604]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll