Unreal Engine Issues and Bug Tracker (UE-54045)

Description

-Crash occurs when debug is set, and anim Blueprint is compiled while actor blueprint is selected
-When reopening project, imported assets are no longer there
-Reopening project after crash, the options under the Debug filter are gone and cannot reproduce crash again

Steps to Reproduce

Download attached asset
Create an empty 4.18 project
Import the attached asset with Import Animation enabled
Create an new anim Blueprint for the downloaded asset
Add New State Machine
Add new state for the asset's animation
Compile/Save
Create a new Actor Blueprint
Create a skeletal mesh component
Add AnimatedSphere mesh to the component
Add the animation Blueprint that was created
Compile/Save
Bring the Actor Blueprint into the Level
Reopen the Anim Blueprint
Change the Debug Filter in the anim Blueprint to a random instance
Compile
See crash

Callstack

LoginId:bdcd2df1437ec38ad0d19c85e30ff2d1
EpicAccountId:1ed52ca976af4368b6c30d11b7cdc18f

Access violation - code c0000005 (first/second chance not available)

UE4Editor_CoreUObject!UObjectBaseUtility::IsA() [d:\main workspace\engine\source\runtime\coreuobject\private\uobject\uobjectbaseutility.cpp:278]
UE4Editor_Engine!UBlueprint::SetObjectBeingDebugged() [d:\main workspace\engine\source\runtime\engine\private\blueprint.cpp:850]
UE4Editor_AnimationBlueprintEditor!FAnimationBlueprintEditor::Compile() [d:\main workspace\engine\source\editor\animationblueprinteditor\private\animationblueprinteditor.cpp:1059]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl(void)>::Execute() [d:\main workspace\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:269]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl(void)>::ExecuteIfSafe() [d:\main workspace\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:345]
UE4Editor_Slate!FUICommandList::ExecuteAction() [d:\main workspace\engine\source\runtime\slate\private\framework\commands\uicommandlist.cpp:97]
UE4Editor_Slate!SToolBarButtonBlock::OnClicked() [d:\main workspace\engine\source\runtime\slate\private\framework\multibox\stoolbarbuttonblock.cpp:300]
UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64>::operator()<>() [d:\main workspace\engine\source\runtime\core\public\delegates\delegateinstanceinterface.h:156]
UE4Editor_Slate!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64> >() [d:\main workspace\engine\source\runtime\core\public\templates\tuple.h:498]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl(void)>::Execute() [d:\main workspace\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:269]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [d:\main workspace\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:537]
UE4Editor_Slate!SButton::OnMouseButtonUp() [d:\main workspace\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:282]
UE4Editor_Slate!<lambda_1002768c627006711ef2f351a87ec0e7>::operator()() [d:\main workspace\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5435]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_1002768c627006711ef2f351a87ec0e7> >() [d:\main workspace\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:266]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [d:\main workspace\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5424]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [d:\main workspace\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5922]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [d:\main workspace\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5902]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [d:\main workspace\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1726]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [d:\main workspace\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2172]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [d:\main workspace\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:889]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [d:\main workspace\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:726]
user32
user32
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [d:\main workspace\engine\source\runtime\applicationcore\private\windows\windowsplatformapplicationmisc.cpp:129]
UE4Editor!FEngineLoop::Tick() [d:\main workspace\engine\source\runtime\launch\private\launchengineloop.cpp:3244]
UE4Editor!GuardedMain() [d:\main workspace\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\main workspace\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\main workspace\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
kernel32
ntdll

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-54045 in the post.

1	Login to Vote

Fixed

Component	OLD - Anim
Affects Versions	4.17.2, 4.18.2, 4.20
Target Fix	4.19

Fix Commit	3845472
Main Commit	3990065
Release Commit	3845472

Created	Jan 15, 2018
Resolved	Jan 19, 2018
Updated	Apr 27, 2018

UE-54045

Animation Blueprint Editor Crashes on Compile if the Debug Instance Selection is Other Than No Object or Preview Instance

Animation Blueprint Editor Crashes on Compile if the Debug Instance Selection is Other Than No Object or Preview Instance

Have Comments or More Details?