Description

The engine crashes when trying to automatically create a type conversion node when they are used a key for a map.

Found in 4.24 CL#10570792
Reproduced in 4.25 Main CL# 10646676

Steps to Reproduce

1. Open a project.
2. Create a blueprint actor.
3. Create a blueprint Map<Vector, Enum>
4. Create a "Find" node linked to the Map
5. Split the AxisVector Key pin into subvalues
6. Attempt to link an int value to one of the split sub values.

Result: The engine crashes.

Expected: The type conversion node is created and the engine doesn't crash.

Callstack
LoginId:9a8d08644d702ac44f074090ac311686
EpicAccountId:580fb2844ad145d79dff08f42acea7c6

Assertion failed: OwningNode [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Classes\EdGraph/EdGraphPin.h] [Line: 474]

UE4Editor_Core!AssertFailedImplV() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:105]
UE4Editor_Core!FDebug::CheckVerifyFailedImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:455]
UE4Editor_Engine!UEdGraphSchema::TryCreateConnection() [d:\build\++ue4\sync\engine\source\runtime\engine\private\edgraph\edgraphschema.cpp:455]
UE4Editor_BlueprintGraph!UEdGraphSchema_K2::TryCreateConnection() [d:\build\++ue4\sync\engine\source\editor\blueprintgraph\private\edgraphschema_k2.cpp:2418]
UE4Editor_GraphEditor!FDragConnection::DroppedOnPin() [d:\build\++ue4\sync\engine\source\editor\grapheditor\private\dragconnection.cpp:212]
UE4Editor_GraphEditor!SGraphPin::OnDrop() [d:\build\++ue4\sync\engine\source\editor\grapheditor\private\sgraphpin.cpp:779]
UE4Editor_Slate!<lambda_f9d2cc83d0c8ff4abca8bcb499abd2a2>::operator()() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4672]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_f9d2cc83d0c8ff4abca8bcb499abd2a2> >() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:372]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4668]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5140]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5108]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1958]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2410]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1638]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:789]
user32
user32
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsplatformapplicationmisc.cpp:130]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:4397]
UE4Editor!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:173]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:263]
UE4Editor!__scrt_common_main_seh() [d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

Have Comments or More Details?

There's no existing public thread on this issue, so head over toAnswerHub just mention UE-85698 in the post.

6
Login to Vote

Fixed
ComponentGameplay - Blueprint Editor
Affects Versions4.244.25
Target Fix4.24.2
Fix Commit10804720
Main Commit10804739
Release Commit10804720
CreatedDec 11, 2019
ResolvedDec 18, 2019
UpdatedMar 3, 2020