Description

A crash is occurring when attempting to slice a procedural mesh that has the Create Other Half option enabled.

Found in 4.13.0. Reproduced in Main CL 312

Steps to Reproduce
  1. Open the attached project
  2. PIE
  3. Press F a few times to slice the mesh

Result: Editor crashes

Callstack
UE4Editor_ProceduralMeshComponent!UKismetProceduralMeshLibrary::SliceProceduralMesh() kismetproceduralmeshlibrary.cpp:773 
UE4Editor_ProceduralMeshComponent!UKismetProceduralMeshLibrary::execSliceProceduralMesh() kismetproceduralmeshlibrary.h:23 
UE4Editor_CoreUObject!UFunction::Invoke() class.cpp:4239 
UE4Editor_CoreUObject!UObject::CallFunction() scriptcore.cpp:704 
UE4Editor_CoreUObject!UObject::ProcessContextOpcode() scriptcore.cpp:2143 
UE4Editor_CoreUObject!UObject::ProcessInternal() scriptcore.cpp:929 
UE4Editor_CoreUObject!UObject::CallFunction() scriptcore.cpp:828 
UE4Editor_CoreUObject!UObject::ProcessInternal() scriptcore.cpp:929 
UE4Editor_CoreUObject!UFunction::Invoke() class.cpp:4239 
UE4Editor_CoreUObject!UObject::ProcessEvent() scriptcore.cpp:1312 
UE4Editor_Engine!AActor::ProcessEvent() actor.cpp:652 
UE4Editor_Engine!FInputActionHandlerDynamicSignature::Execute() inputcomponent.h:105 
UE4Editor_Engine!FInputActionUnifiedDelegate::Execute() inputcomponent.h:201 
UE4Editor_Engine!UPlayerInput::ProcessInputStack() playerinput.cpp:1232 
UE4Editor_Engine!APlayerController::ProcessPlayerInput() playercontroller.cpp:2351 
UE4Editor_Engine!APlayerController::TickPlayerInput() playercontroller.cpp:3940 
UE4Editor_Engine!APlayerController::PlayerTick() playercontroller.cpp:2014 
UE4Editor_Engine!APlayerController::TickActor() playercontroller.cpp:4018 
UE4Editor_Engine!FActorTickFunction::ExecuteTick() actor.cpp:112 
UE4Editor_Engine!FTickFunctionTask::DoTask() ticktaskmanager.cpp:251 
UE4Editor_Engine!TGraphTask<FTickFunctionTask>::ExecuteTask() taskgraphinterfaces.h:868 
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() taskgraph.cpp:932 
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() taskgraph.cpp:679 
UE4Editor_Core!FTaskGraphImplementation::WaitUntilTasksComplete() taskgraph.cpp:1776 
UE4Editor_Engine!FTickTaskSequencer::ReleaseTickGroup() ticktaskmanager.cpp:520 
UE4Editor_Engine!FTickTaskManager::RunTickGroup() ticktaskmanager.cpp:1426 
UE4Editor_Engine!UWorld::RunTickGroup() leveltick.cpp:715 
UE4Editor_Engine!UWorld::Tick() leveltick.cpp:1284 
UE4Editor_UnrealEd!UEditorEngine::Tick() editorengine.cpp:1409 
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() unrealedengine.cpp:371 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:2842 
UE4Editor!GuardedMain() launch.cpp:156 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:126 
UE4Editor!WinMain() launchwindows.cpp:202 
UE4Editor!__scrt_common_main_seh() exe_common.inl:264 
kernel32!<Unknown> 
ntdll!<Unknown> 

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Fixed
ComponentUE - Gameplay
Affects Versions4.134.14
Target Fix4.14
Fix Commit3134106
Main Commit3136620
CreatedSep 19, 2016
ResolvedSep 21, 2016
UpdatedApr 27, 2018
View Jira Issue