Unreal Engine Issues and Bug Tracker (UE-50768)

Description

REGRESSION Uncertain, was not able to repro in 4.17 with these steps. But I also can't repro with another version of QAGame in Binary editor.

Crash occurs when the user closes a parent and child blueprint after renaming a variable in the parent blueprint.

Steps to Reproduce

Open QAGame in editor.
Create a new actor blueprint named "Parent".
Open Parent.
Add a string variable named "Test".
Compile and close the blueprint.
Right-click Parent and select Create Child Blueprint Class.
Name the new blueprint "Child".
Open Child.
Right-click in the Event Graph and add a Get Test node.
Drag off Get Test and add a Print String Node.
Wire Print String to Parent : Begin Play.
Compile.
With Child still open, open Parent again.
Rename Test to "Rename".
Compile Parent.
Close both Parent and Child.

RESULT

Crash

Callstack

UE4Editor_Core!rml::internal::ExtMemoryPool::initTLS() 
UE4Editor_Core!FMallocTBB::Free() malloctbb.cpp:130 
UE4Editor_Core!FMemory::Free() fmemory.inl:76 
UE4Editor_Kismet!TSparseArray<TSetElement<TWeakObjectPtr<UObject,FWeakObjectPtr> >,TSparseArrayAllocator<FDefaultAllocator,FDefaultBitArrayAlloca sparsearray.h:79 
UE4Editor_Kismet!FBlueprintActionMenuItem::~FBlueprintActionMenuItem() 
UE4Editor_Kismet!FBlueprintActionMenuItem::`scalar deleting destructor'() 
UE4Editor_Engine!TArray<TSharedPtr<FEdGraphSchemaAction,0>,FDefaultAllocator>::~TArray<TSharedPtr<FEdGraphSchemaAction,0>,FDefaultAllocator>() array.h:529 
UE4Editor_GraphEditor!FGraphActionListBuilderBase::~FGraphActionListBuilderBase() edgraphschema.h:511 
UE4Editor_GraphEditor!SGraphActionMenu::~SGraphActionMenu() 
UE4Editor_SlateCore!TIndirectArray<SOverlay::FOverlaySlot,FDefaultAllocator>::DestructAndFreeItems() indirectarray.h:444 
UE4Editor_SlateCore!SOverlay::~SOverlay() 
UE4Editor_SlateCore!TIndirectArray<SBoxPanel::FSlot,FDefaultAllocator>::DestructAndFreeItems() indirectarray.h:444 
UE4Editor_SlateCore!SBoxPanel::~SBoxPanel() 
UE4Editor_SlateCore!FSimpleSlot::~FSimpleSlot() 
UE4Editor_SlateCore!SCompoundWidget::~SCompoundWidget() 
UE4Editor_SlateCore!FSimpleSlot::~FSimpleSlot() 
UE4Editor_SlateCore!SCompoundWidget::~SCompoundWidget() 
UE4Editor_SlateCore!FSlotBase::~FSlotBase() slotbase.cpp:35 
UE4Editor_Slate!TIndirectArray<SSplitter::FSlot,FDefaultAllocator>::DestructAndFreeItems() indirectarray.h:445 
UE4Editor_Slate!SSplitter::~SSplitter() 
UE4Editor_SlateCore!FSimpleSlot::~FSimpleSlot() 
UE4Editor_SlateCore!SCompoundWidget::~SCompoundWidget() 
UE4Editor_Kismet!FBlueprintEditor::~FBlueprintEditor() blueprinteditor.cpp:2216 
UE4Editor_Kismet!FBlueprintEditor::`vector deleting destructor'() 
UE4Editor_UnrealEd!SStandaloneAssetEditorToolkitHost::~SStandaloneAssetEditorToolkitHost() sstandaloneasseteditortoolkithost.cpp:197 
UE4Editor_Slate!SDockTab::~SDockTab() 
UE4Editor_SlateCore!FReply::~FReply() 
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() slateapplication.cpp:5753 
UE4Editor_Slate!FSlateApplication::OnMouseUp() slateapplication.cpp:5730 
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1725 
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() windowsapplication.cpp:2171 
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() windowsapplication.cpp:888 
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() windowsapplication.cpp:725 
user32!<Unknown> 
user32!<Unknown> 
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() windowsplatformapplicationmisc.cpp:129 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:3220 
UE4Editor!GuardedMain() launch.cpp:166 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:134 
UE4Editor!WinMain() launchwindows.cpp:210 
UE4Editor!__scrt_common_main_seh() exe_common.inl:253 
kernel32!<Unknown> 
ntdll!<Unknown>

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Fixed

Component	UE - Gameplay - Blueprint
Affects Versions	4.18
Target Fix	4.18

Fix Commit	3679700
Release Commit	3679700

Created	Oct 4, 2017
Resolved	Oct 9, 2017
Updated	Apr 27, 2018

UE-50768

Crash closing Parent and Child blueprint after renaming variable

Crash closing Parent and Child blueprint after renaming variable

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