Unreal Engine Issues and Bug Tracker (UE-27729)

Description

If a custom AIController class defines an AISenseConfig_Sight pointer, creating a blueprint of this class and attempting to edit values in the drop down for the array elements causes the editor to crash.

Steps to Reproduce

Open UE4 Editor (any project)
Add code to project based on AIController (MyAIController)

In MyAIController.h and the following:

Includes:

#include "Perception/AIPerceptionSystem.h"
#include "Perception/AIPerceptionComponent.h"
#include "Perception/AISenseConfig_Sight.h"

Inside class definition:

public:
	AMyAIController(const FObjectInitializer& ObjectInitializer);
	UPROPERTY(VisibleDefaultsOnly, BlueprintReadOnly, Category = "Test")
		UAIPerceptionComponent* PerceptionComp;
	UPROPERTY(EditDefaultsOnly, BlueprintReadWrite, Category = "Test")
		UAISenseConfig_Sight* SightConfig;

In MyAIController.cpp add the following:

AMyAIController::AMyAIController(const FObjectInitializer& ObjectInitializer) : Super(ObjectInitializer)
{
	PerceptionComp = ObjectInitializer.CreateDefaultSubobject<UAIPerceptionComponent>(this, "Perception Comp");

	SightConfig = CreateDefaultSubobject<UAISenseConfig_Sight>("Sight Sense");
	PerceptionComp->ConfigureSense(*SightConfig);
	PerceptionComp->SetDominantSense(SightConfig->GetSenseImplementation());
}

Compile
In the editor, make a blueprint based on MyAIController and open it
Select the "PerceptionComp" component and find AI Perception in the details panel
Expand the arrow for Sense Config->0->Sense
Click in any of the value fields and enter a new number
Press enter to confirm new value

Result:
Editor crashes immediately when the value is changed. This also occurs if the sliders are used to edit the values

Expected:
Value changes are recognized and recorded by the editor

Repro Rate:
5/5

Callstack

MachineId:9FA88CA44B7C623122B0039D6C8BA1B0
EpicAccountId:67b2dfbf573f4ca89257ae6f4e56a46c

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

""

UE4Editor_PropertyEditor!FPropertyNode::PropagatePropertyChange() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\propertyeditor\private\propertynode.cpp:2400]
UE4Editor_PropertyEditor!FPropertyValueImpl::ImportText() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\propertyeditor\private\propertyhandleimpl.cpp:426]
UE4Editor_PropertyEditor!FPropertyValueImpl::ImportText() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\propertyeditor\private\propertyhandleimpl.cpp:297]
UE4Editor_PropertyEditor!FPropertyHandleFloat::SetValue() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\propertyeditor\private\propertyhandleimpl.cpp:2334]
UE4Editor_PropertyEditor!SPropertyEditorNumeric<float>::OnValueCommitted() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\propertyeditor\private\userinterface\propertyeditor\spropertyeditornumeric.h:297]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyEditorNumeric<float>,0,TTypeWrapper<void> __cdecl(float,enum ETextCommit::Type)>::Execute() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyEditorNumeric<float>,0,void __cdecl(float,enum ETextCommit::Type)>::ExecuteIfSafe() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:388]
UE4Editor_PropertyEditor!SSpinBox<float>::CommitValue() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\public\widgets\input\sspinbox.h:614]
UE4Editor_PropertyEditor!SSpinBox<float>::TextField_OnTextCommitted() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\public\widgets\input\sspinbox.h:544]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SSpinBox<float>,0,TTypeWrapper<void> __cdecl(FText const & __ptr64,enum ETextCommit::Type)>::Execute() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SSpinBox<float>,0,void __cdecl(FText const & __ptr64,enum ETextCommit::Type)>::ExecuteIfSafe() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:388]
UE4Editor_Slate!SEditableText::OnEnter() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\widgets\input\seditabletext.cpp:911]
UE4Editor_Slate!FTextEditHelper::OnKeyDown() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\text\textedithelper.cpp:191]
UE4Editor_Slate!SEditableText::OnKeyDown() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\widgets\input\seditabletext.cpp:1518]
UE4Editor_Slate!<lambda_aecc0dcd28a75afb5aabe6b3b7d4c719>::operator()() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3920]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FKeyEvent,<lambda_aecc0dcd28a75afb5aabe6b3b7d4c719> >() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:214]
UE4Editor_Slate!FEventRouter::RouteAlongFocusPath<FEventRouter::FBubblePolicy,<lambda_aecc0dcd28a75afb5aabe6b3b7d4c719>,FKeyEvent>() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:196]
UE4Editor_Slate!FSlateApplication::ProcessKeyDownEvent() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3918]
UE4Editor_Slate!FSlateApplication::OnKeyDown() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3845]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:1272]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:1721]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:719]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:641]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:884]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\launchengineloop.cpp:2391]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

Community References

C++ created Perception Component crash editor

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Cannot Reproduce

Component	UE - Gameplay - Blueprint
Affects Versions	4.10.4
Target Fix	4.11

Created	Mar 2, 2016
Resolved	Mar 4, 2016
Updated	Apr 27, 2018

UE-27729

Crash when editing details of an AI Perception Component's Senses Config field

Crash when editing details of an AI Perception Component's Senses Config field

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