Unreal Engine Issues and Bug Tracker (UE-151424)

Description

"Assertion failed: Pair != nullptr " when trying to create a basic test with AEditorFunctionalTest in a WP map.

Steps to Reproduce

Enable the "Functional Testing Editor" plugin.
Open/Create a WP map.
Place an Editor Functional Test actor into the scene.
Open up the level BP and create a basic test with it using the BP graph from the docs: https://docs.unrealengine.com/4.27/en-US/TestingAndOptimization/Automation/FunctionalTesting/
Should hit an assert for not finding the key and attempting to reopen the map again will retrigger it.

Callstack

UnrealEditor-Engine.dll!TMapBase<FGuid,FWorldPartitionActorDescView,FDefaultSetAllocator,TDefaultMapHashableKeyFuncs<FGuid,FWorldPartitionActorDescView,0>>::FindChecked(const FGuid &) Line 656	C++
UnrealEditor-Engine.dll!FWorldPartitionStreamingGenerator::ValidateActorDescriptorViews() Line 217	C++
UnrealEditor-Engine.dll!FWorldPartitionStreamingGenerator::PreparationPhase(const UActorDescContainer * Container) Line 465	C++
UnrealEditor-Engine.dll!UWorldPartition::GenerateStreaming(TArray<FString,TSizedDefaultAllocator<32>> * OutPackagesToGenerate) Line 621	C++
[Inline Frame] UnrealEditor-Engine.dll!UWorldPartition::OnBeginPlay() Line 336	C++
UnrealEditor-Engine.dll!UWorldPartition::OnPreBeginPIE(bool bStartSimulate) Line 325	C++
[Inline Frame] UnrealEditor-Engine.dll!Invoke(void(UWorldPartition::*)(bool)) Line 66	C++
[Inline Frame] UnrealEditor-Engine.dll!UE::Core::Private::Tuple::TTupleBase<TIntegerSequence<unsigned int>>::ApplyAfter(void(UWorldPartition::*)(bool) &) Line 327	C++
UnrealEditor-Engine.dll!TBaseUObjectMethodDelegateInstance<0,UWorldPartition,void __cdecl(bool),FDefaultDelegateUserPolicy>::ExecuteIfSafe(bool <Params_0>) Line 611	C++
UnrealEditor-UnrealEd.dll!TMulticastDelegate<void __cdecl(bool),FDefaultDelegateUserPolicy>::Broadcast(bool <Params_0>) Line 967	C++
UnrealEditor-UnrealEd.dll!UEditorEngine::StartPlayInEditorSession(FRequestPlaySessionParams & InRequestParams) Line 2543	C++
UnrealEditor-UnrealEd.dll!UEditorEngine::StartQueuedPlaySessionRequestImpl() Line 1172	C++
UnrealEditor-UnrealEd.dll!UEditorEngine::StartQueuedPlaySessionRequest() Line 1075	C++
UnrealEditor-UnrealEd.dll!UEditorEngine::AutomationLoadMap(const FString & MapName, bool bForceReload, FString * OutError) Line 7457	C++
[Inline Frame] UnrealEditor-UnrealEd.dll!Invoke(void(UEditorEngine::*)(const FString &, bool, FString *)) Line 66	C++
[Inline Frame] UnrealEditor-UnrealEd.dll!UE::Core::Private::Tuple::TTupleBase<TIntegerSequence<unsigned int>>::ApplyAfter(void(UEditorEngine::*)(const FString &, bool, FString *) &) Line 327	C++
UnrealEditor-UnrealEd.dll!TBaseUObjectMethodDelegateInstance<0,UEditorEngine,void __cdecl(FString const &,bool,FString *),FDefaultDelegateUserPolicy>::ExecuteIfSafe(const FString & <Params_0>, bool <Params_1>, FString * <Params_2>) Line 611	C++
[Inline Frame] UnrealEditor-Engine.dll!TMulticastDelegate<void __cdecl(FString const &,bool,FString *),FDefaultDelegateUserPolicy>::Broadcast(const FString &) Line 967	C++
UnrealEditor-Engine.dll!AutomationOpenMap(const FString & MapName, bool bForceReload) Line 365	C++
UnrealEditor-FunctionalTesting.dll!FClientFunctionalTestingMapsBase::RunTest(const FString & Parameters) Line 115	C++
UnrealEditor-Core.dll!FAutomationTestFramework::InternalStartTest(const FString & InTestToRun) Line 773	C++
UnrealEditor-Core.dll!FAutomationTestFramework::StartTestByName(const FString & InTestToRun, const int InRoleIndex) Line 386	C++
UnrealEditor-AutomationWorker.dll!FAutomationWorkerModule::HandleRunTestsMessage(const FAutomationWorkerRunTests & Message, const TSharedRef<IMessageContext,1> & Context) Line 587	C++
UnrealEditor-AutomationWorker.dll!TRawMessageHandler<FAutomationWorkerRunTests,FAutomationWorkerModule>::HandleMessage(const TSharedRef<IMessageContext,1> & Context) Line 103	C++
[Inline Frame] UnrealEditor-AutomationWorker.dll!FMessageEndpoint::ProcessMessage(const TSharedRef<IMessageContext,1> &) Line 998	C++
UnrealEditor-AutomationWorker.dll!FMessageEndpoint::ProcessInbox() Line 425	C++
UnrealEditor.exe!FEngineLoop::Tick() Line 5437	C++
[Inline Frame] UnrealEditor.exe!EngineTick() Line 62	C++
UnrealEditor.exe!GuardedMain(const wchar_t * CmdLine) Line 186	C++
UnrealEditor.exe!LaunchWindowsStartup(HINSTANCE__ * hInInstance, HINSTANCE__ * hPrevInstance, char * __formal, int nCmdShow, const wchar_t * CmdLine) Line 272	C++
UnrealEditor.exe!WinMain(HINSTANCE__ * hInInstance, HINSTANCE__ * hPrevInstance, char * pCmdLine, int nCmdShow) Line 330	C++

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Fixed

Component	UE - World Creation - Worldbuilding Tools - World Partition
Affects Versions	5.0
Target Fix	5.1

Fix Commit	20109758
Main Commit	20112740

Created	May 9, 2022
Resolved	May 9, 2022
Updated	May 16, 2022

View Jira Issue

UE-151424

AEditorFunctionalTest causes assert in WP map

AEditorFunctionalTest causes assert in WP map

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