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
  1. Open QAGame in editor.
  2. Create a new actor blueprint named "Parent".
  3. Open Parent.
  4. Add a string variable named "Test".
  5. Compile and close the blueprint.
  6. Right-click Parent and select Create Child Blueprint Class.
  7. Name the new blueprint "Child".
  8. Open Child.
  9. Right-click in the Event Graph and add a Get Test node.
  10. Drag off Get Test and add a Print String Node.
  11. Wire Print String to Parent : Begin Play.
  12. Compile.
  13. With Child still open, open Parent again.
  14. Rename Test to "Rename".
  15. Compile Parent.
  16. 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
ComponentGameplay - Blueprint
Affects Versions4.18
Target Fix4.18
Fix Commit3679700
Release Commit3679700
CreatedOct 4, 2017
ResolvedOct 9, 2017
UpdatedApr 27, 2018