Unreal Engine Issues and Bug Tracker (UE-26742)

Description

The user's project is crashing during compilation of one of their character blueprints.

We have not been able to reproduce this issue in a clean project, as the repro steps are unknown outside of this particular project.

Deleting a variable and then recreating it allows you to compile the blueprint successfully one time, but then crashes on the second compile.

Found in 4.11 Preview 3.

Steps to Reproduce

1. Download the project located here: [Link Removed]
2. Open the I_MaleCharacter blueprint (Content->Characters->Male)
3. Compile the blueprint

Result: Editor Crashes

Expected: Blueprint would compile successfully

Callstack

UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1062]
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_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_Engine!AActor::PostEditChangeProperty() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\actoreditor.cpp:113]
UE4Editor_CoreUObject!UObject::PostEditChange() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\coreuobject\private\uobject\obj.cpp:285]
UE4Editor_UnrealEd!FBlueprintEditorUtils::PostEditChangeBlueprintActors() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\unrealed\private\kismet2\blueprinteditorutils.cpp:7279]
UE4Editor_Kismet!FBlueprintEditor::OnBlueprintChangedImpl() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\kismet\private\blueprinteditor.cpp:3080]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl(UBlueprint * __ptr64)>::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(UBlueprint * __ptr64)>::ExecuteIfSafe() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:428]
UE4Editor_Engine!TBaseMulticastDelegate<void,UBlueprint * __ptr64>::Broadcast() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:921]
UE4Editor_UnrealEd!FKismetEditorUtilities::CompileBlueprint() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:819]
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

Community References

Compile Blueprint crash Editor 4.11p3/p4

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Fixed

Component	OLD - Anim
Affects Versions	4.11
Target Fix	4.11

Fix Commit	2869891
Main Commit	2873884

Created	Feb 10, 2016
Resolved	Feb 17, 2016
Updated	May 18, 2020

UE-26742

Attached Project Crashes When Compiling Character Blueprint

Attached Project Crashes When Compiling Character Blueprint

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