Unreal Engine Issues and Bug Tracker (UE-81793)

Description

Changing the default values inside of a camera modifier blueprint when referencing it in another blueprint results in a crash.

Tested in 4.21, 4.22, 4.23 and 4.24

Steps to Reproduce

SIMPLER REPRO:

Open any project in editor.
Create and open an actor blueprint.
Add a PostProcessSettings variable and compile.
Expand the Defaults Value for the variable.
Under Film, enable one of the values and change them.
Compile.

ORIGINAL REPRO:

Create a blank project in 4.23
Create a blueprint deriving from "CameraModifier"
Override "BlueprintModifyPostProcess"
Promote "Post Process Settings" to a variable
Compile and save the blueprint
Create a new Actor blueprint
In the Event Graph, right click and add "Get Player Camera Manager" node
Drag off of the Get Player Camera Manager node's return value and create an "Add new camera modifier" node
Select the CameraModifer blueprint in the class drop down
Compile and save the Actor blueprint
Navigate back to the Camera Modifier blueprint and click on the "Post Process Settings" variable.
In the details panel, under "Default Value", drop down the "Film" tab and select any check box and manipulate the value.
Compile the blueprint

Results: Editor crashes

Expected: Successful compile

Callstack

Assertion failed: ContainerPtr [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject/UnrealType.h] [Line: 340]

UE4Editor_Core!FWindowsErrorOutputDevice::Serialize() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowserroroutputdevice.cpp:79]
UE4Editor_Core!FOutputDevice::LogfImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:71]
UE4Editor_Core!AssertFailedImplV() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:101]
UE4Editor_Core!FDebug::CheckVerifyFailedImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:445]
UE4Editor_PropertyEditor!FEditConditionContext::GetBoolValue() [d:\build\++ue4\sync\engine\source\editor\propertyeditor\private\editconditioncontext.cpp:108]
UE4Editor_PropertyEditor!FEditConditionParser::Evaluate() [d:\build\++ue4\sync\engine\source\editor\propertyeditor\private\editconditionparser.cpp:647]
UE4Editor_PropertyEditor!FPropertyEditor::IsEditConditionMet() [d:\build\++ue4\sync\engine\source\editor\propertyeditor\private\presentation\propertyeditor\propertyeditor.cpp:583]
UE4Editor_PropertyEditor!SEditConditionWidget::OnGetEditConditionCheckState() [d:\build\++ue4\sync\engine\source\editor\propertyeditor\private\propertyeditorhelpers.cpp:384]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<1,SEditConditionWidget,0,enum ECheckBoxState __cdecl(void)>::Execute() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:293]
UE4Editor_Slate!SCheckBox::OnGetCheckImage() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\input\scheckbox.cpp:252]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<1,SCheckBox,0,FSlateBrush const * __cdecl(void)>::Execute() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:293]
UE4Editor_SlateCore!SImage::ComputeDesiredSize() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\images\simage.cpp:47]
UE4Editor_SlateCore!SWidget::CacheDesiredSize() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:667]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:556]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_SlateCore!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:545]
UE4Editor_Slate!PrepassWindowAndChildren() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1460]
UE4Editor_Slate!PrepassWindowAndChildren() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1468]
UE4Editor_Slate!FSlateApplication::DrawPrepass() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1506]
UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1553]
UE4Editor_Slate!FSlateApplication::DrawWindows() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1279]
UE4Editor_Slate!FSlateApplication::TickApplication() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1881]
UE4Editor_Slate!FSlateApplication::Tick() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1712]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:4361]
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:147]
UE4Editor!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:279]
UE4Editor!__scrt_common_main_seh() [d:\agent\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

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Fixed

Component	Tools
Affects Versions	4.23, 4.24
Target Fix	4.24

Fix Commit	9743423
Main Commit	11224363
Release Commit	9743423

Created	Oct 14, 2019
Resolved	Oct 15, 2019
Updated	Jan 25, 2021

UE-81793

Camera modifier blueprint used in another blueprint crashes editor (Assert failed in edit condition code in details panel)

Camera modifier blueprint used in another blueprint crashes editor (Assert failed in edit condition code in details panel)

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