Unreal Engine Issues and Bug Tracker (UE-6234)

Description

The engine crashes when after right-click > Expand Node on any composite node.

Crash Report:
[Link Removed]

Steps to Reproduce

1. Launch: UE4Editor.exe (any project)
2. Create a new Actor Blueprint
3. Create a FlipFlop node
4. Right click the node and select Expand Node

Result:
Crash

Callstack

Call Stack:

<unknown module>! UE4Editor_Core!FOutputDeviceWindowsError::Serialize() 
<unknown module>! UE4Editor_Core!FOutputDevice::Logf__VA() 
<unknown module>! UE4Editor_Core!FDebug::AssertFailed() 
<unknown module>! UE4Editor_UnrealEd!FBlueprintEditorUtils::FindBlueprintForGraphChecked() 
<unknown module>! UE4Editor_BlueprintGraph!UEdGraphSchema_K2::IsPinBeingWatched() 
<unknown module>! UE4Editor_GraphEditor!SGraphPin::GetPinStatusIconVisibility() 
<unknown module>! UE4Editor_GraphEditor!TBaseSPMethodDelegateInstance<1,SGraphPin,0,EVisibility __cdecl(void) 
<unknown module>! UE4Editor_SlateCore!FArrangedChildren::AddWidget() 
<unknown module>! UE4Editor_Slate!SWrapBox::OnArrangeChildren() 
<unknown module>! UE4Editor_SlateCore!SWidget::ArrangeChildren() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries_Helper() 
<unknown module>! UE4Editor_SlateCore!SWidget::FindChildGeometries() 
<unknown module>! UE4Editor_GraphEditor!SGraphPanel::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SOverlay::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_Slate!SBox::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_Slate!SBorder::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SOverlay::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_SlateCore!SPanel::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_Slate!SSplitter::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_Slate!SSplitter::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_Slate!SSplitter::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SOverlay::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_SlateCore!SPanel::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_Slate!SBorder::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SOverlay::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_SlateCore!SPanel::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_Slate!SSplitter::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SOverlay::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_SlateCore!SPanel::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SPanel::PaintArrangedChildren() 
<unknown module>! UE4Editor_SlateCore!SPanel::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SOverlay::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SCompoundWidget::OnPaint() 
<unknown module>! UE4Editor_SlateCore!SWidget::Paint() 
<unknown module>! UE4Editor_SlateCore!SWindow::PaintWindow() 
<unknown module>! UE4Editor_Slate!FSlateApplication::DrawWindowAndChildren() 
<unknown module>! UE4Editor_Slate!FSlateApplication::DrawWindowAndChildren() 
<unknown module>! UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() 
<unknown module>! UE4Editor_Slate!FSlateApplication::Tick() 
<unknown module>! UE4Editor!FEngineLoop::Tick() 
<unknown module>! UE4Editor!GuardedMain() 
<unknown module>! UE4Editor!GuardedMainWrapper() 
<unknown module>! UE4Editor!WinMain() 
<unknown module>! UE4Editor!__tmainCRTStartup()

Community References

"Session Disconnected" UEFN

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Fixed

Component	UE - Gameplay - Blueprint
Affects Versions	4.5.1, 4.6, 4.7

Fix Commit	2383820

Created	Dec 4, 2014
Resolved	Dec 10, 2014
Updated	Apr 27, 2018

View Jira Issue

UE-6234

Expand Node crashes engine

Expand Node crashes engine

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