Unreal Engine Issues and Bug Tracker (UE-62593)

Description

When copy and pasting nodes from an Actor Blueprint to an Object Blueprint the Editor stalls for a bit and an ensure occurs.

This issue was reported and tested in 4.19.2 (CL-4033788). This issue was reproduced in 4.20.1 (CL-4233996) and Main 4.21 (CL-4258917)

Steps to Reproduce

Open the UE4 Editor
Create an Actor Blueprint
In the Actor Blueprint add 'Get Navigation System', 'Is Navigation Being Built', and connect them to a Branch
Create an Object Blueprint
In the Object Blueprint copy/paste the three added nodes from the Actor Blueprint
Select only 'Get Navigation System' and 'Is Navigation Being Built' from the Actor Blueprint and copy/paste those into the Object Blueprint

Results: The Editor stalls and an ensure occurs

Expected: The nodes are pasted without an ensure occuring

Callstack

LogOutputDevice: Error: === Handled ensure: ===
LogOutputDevice: Error: Ensure condition failed: ToPin->LinkedTo.Contains(this) [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp] [Line: 476]
LogOutputDevice: Error: UEdGraphPin::BreakLinkTo Pin 'Condition' on node 'Branch' not reciprocally linked with pin 'ReturnValue' on node 'Is Navigation Being Built'
LogOutputDevice: Error: Stack: 
LogOutputDevice: Error: [Callstack] 0x00000000CA98B706 UE4Editor-Core.dll!FWindowsPlatformStackWalk::StackWalkAndDump() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\windows\windowsplatformstackwalk.cpp:234]
LogOutputDevice: Error: [Callstack] 0x00000000CA6EAE3A UE4Editor-Core.dll!FDebug::EnsureFailed() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:299]
LogOutputDevice: Error: [Callstack] 0x00000000CA6FECD6 UE4Editor-Core.dll!FDebug::OptionallyLogFormattedEnsureMessageReturningFalse() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:430]
LogOutputDevice: Error: [Callstack] 0x00000000C5B768F3 UE4Editor-Engine.dll!UEdGraphPin::BreakLinkTo() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\engine\private\edgraph\edgraphpin.cpp:476]
LogOutputDevice: Error: [Callstack] 0x00000000C5B76719 UE4Editor-Engine.dll!UEdGraphPin::BreakAllPinLinks() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\engine\private\edgraph\edgraphpin.cpp:496]
LogOutputDevice: Error: [Callstack] 0x00000000C5B76089 UE4Editor-Engine.dll!UEdGraphNode::BreakAllNodeLinks() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\engine\private\edgraph\edgraphnode.cpp:315]
LogOutputDevice: Error: [Callstack] 0x00000000C3F2E3BF UE4Editor-UnrealEd.dll!FGraphObjectTextFactory::PostProcessConstructedObjects() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\edgraphutilities.cpp:111]
LogOutputDevice: Error: [Callstack] 0x00000000C4113059 UE4Editor-UnrealEd.dll!FCustomizableTextObjectFactory::ProcessBuffer() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\factories\editorfactories.cpp:4836]
LogOutputDevice: Error: [Callstack] 0x00000000C3F193C3 UE4Editor-UnrealEd.dll!FEdGraphUtilities::ImportNodesFromText() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\edgraphutilities.cpp:382]
LogOutputDevice: Error: [Callstack] 0x00000000C2A28E4D UE4Editor-Kismet.dll!FBlueprintEditor::PasteNodesHere() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\kismet\private\blueprinteditor.cpp:5793]
LogOutputDevice: Error: [Callstack] 0x00000000C2A28C2F UE4Editor-Kismet.dll!FBlueprintEditor::PasteNodes() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\kismet\private\blueprinteditor.cpp:5566]
LogOutputDevice: Error: [Callstack] 0x00000000C29BFE41 UE4Editor-Kismet.dll!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl(void)>::Execute() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:269]
LogOutputDevice: Error: [Callstack] 0x00000000C29C4BA6 UE4Editor-Kismet.dll!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl(void)>::ExecuteIfSafe() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:345]
LogOutputDevice: Error: [Callstack] 0x00000000D3BF8376 UE4Editor-Slate.dll!FUICommandList::ConditionalProcessCommandBindings() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\commands\uicommandlist.cpp:216]
LogOutputDevice: Error: [Callstack] 0x00000000D3C34BD0 UE4Editor-Slate.dll!FUICommandList::ProcessCommandBindings() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\commands\uicommandlist.cpp:160]
LogOutputDevice: Error: [Callstack] 0x00000000C0E802DD UE4Editor-GraphEditor.dll!SGraphEditorImpl::OnKeyDown() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\grapheditor\private\sgrapheditorimpl.cpp:78]
LogOutputDevice: Error: [Callstack] 0x00000000D3BE4D61 UE4Editor-Slate.dll!<lambda_2afcd964c763e269e2d1a63f3a72f846>::operator()() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5011]
LogOutputDevice: Error: [Callstack] 0x00000000D3BB6D2D UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FKeyEvent,<lambda_2afcd964c763e269e2d1a63f3a72f846> >() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:266]
LogOutputDevice: Error: [Callstack] 0x00000000D3BB88F6 UE4Editor-Slate.dll!FEventRouter::RouteAlongFocusPath<FEventRouter::FBubblePolicy,<lambda_2afcd964c763e269e2d1a63f3a72f846>,FKeyEvent>() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:247]
LogOutputDevice: Error: [Callstack] 0x00000000D3C363CA UE4Editor-Slate.dll!FSlateApplication::ProcessKeyDownEvent() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5009]
LogOutputDevice: Error: [Callstack] 0x00000000D3C299C8 UE4Editor-Slate.dll!FSlateApplication::OnKeyDown() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4921]
LogOutputDevice: Error: [Callstack] 0x00000000F1CEE3DA UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1561]
LogOutputDevice: Error: [Callstack] 0x00000000F1CE1B78 UE4Editor-ApplicationCore.dll!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2172]
LogOutputDevice: Error: [Callstack] 0x00000000F1CF052C UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:889]
LogOutputDevice: Error: [Callstack] 0x00000000F1CDD679 UE4Editor-ApplicationCore.dll!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:726]
LogOutputDevice: Error: [Callstack] 0x000000001602B85D USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000001602B1EF USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00000000F1CF1666 UE4Editor-ApplicationCore.dll!FWindowsPlatformApplicationMisc::PumpMessages() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsplatformapplicationmisc.cpp:129]
LogOutputDevice: Error: [Callstack] 0x0000000052C95475 UE4Editor.exe!FEngineLoop::Tick() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3263]
LogOutputDevice: Error: [Callstack] 0x0000000052CA6BD0 UE4Editor.exe!GuardedMain() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
LogOutputDevice: Error: [Callstack] 0x0000000052CA6C4A UE4Editor.exe!GuardedMainWrapper() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:144]
LogOutputDevice: Error: [Callstack] 0x0000000052CB4177 UE4Editor.exe!WinMain() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:223]
LogOutputDevice: Error: [Callstack] 0x0000000052CB5B87 UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
LogOutputDevice: Error: [Callstack] 0x0000000015891FE4 KERNEL32.DLL!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000001627CB31 ntdll.dll!UnknownFunction []

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Fixed

Component	UE - Gameplay
Affects Versions	4.19.2, 4.20.1, 4.21, 4.22
Target Fix	4.23

Fix Commit	5343057
Main Commit	6835252

Created	Aug 7, 2018
Resolved	Mar 7, 2019
Updated	Jun 4, 2019

Pull Requests

4946 - projectgheist

View Jira Issue

UE-62593

Ensure when pasting copied nodes into an Object

Ensure when pasting copied nodes into an Object

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