Editing property with InlineEditConditionToggle meta specifier causes the editor to crash.
Workaround:
Calling Super::PostEditChangeProperty after property changing code prevents crash from occurring.
USTRUCT()
struct FTestStruct
{
GENERATED_BODY()
UPROPERTY(EditAnywhere)
int32 Prop;
UPROPERTY(EditAnywhere, Meta = (InlineEditConditionToggle))
bool bEditConditionProp;
UPROPERTY(EditAnywhere, Meta = (EditCondition = bEditConditionProp))
int32 OtherProp;
};
#if WITH_EDITOR virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override { Super::PostEditChangeProperty(PropertyChangedEvent); for (FTestStruct& TestStruct : TestArray) { TestStruct.Prop = 1; } } #endif UPROPERTY(EditAnywhere) TArray<FTestStruct> TestArray;
Result:
The editor crashes with listed callstack
Expected:
Checkbox is updated and editor continues to run
MachineId:7156C35640F86204E61B8383F45DEE17 EpicAccountId:c807849e05a0413d99e379f2802cae9c Assertion failed: ContainerPtr [File:D:\Build\++UE4+Release-4.13+Compile\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject\UnrealType.h] [Line: 303] UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:421] UE4Editor_PropertyEditor!FPropertyEditor::SetEditConditionState() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\propertyeditor\private\presentation\propertyeditor\propertyeditor.cpp:385] UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SEditConditionWidget,0,TTypeWrapper<void> __cdecl(enum ECheckBoxState)>::Execute() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:317] UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SEditConditionWidget,0,void __cdecl(enum ECheckBoxState)>::ExecuteIfSafe() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:424] UE4Editor_Slate!SCheckBox::ToggleCheckedState() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\widgets\input\scheckbox.cpp:293] UE4Editor_Slate!SCheckBox::OnMouseButtonUp() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\widgets\input\scheckbox.cpp:184] UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator()() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4901] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:215] UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4890] UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5348] UE4Editor_Slate!FSlateApplication::OnMouseUp() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5328] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1584] UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1930] UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:747] UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:669] user32 user32 UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:905] UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2788] UE4Editor!GuardedMain() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\launch.cpp:156] UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126] UE4Editor!WinMain() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202] UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264] kernel32 ntdll
How does TextureRenderTarget2D get TArray<uint8> type data?
Why does the REMOVE method of map container remove elements have memory leaks?
How to delete some elements correctly when deleting an array loop?
How do I set a material as a post-processing material?
What is the cause of the packaging error falling back to 'GameUserSettings' in ue5?
UMG RichText not appear image when packaged
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-37029 in the post.