REGRESSION: No, occurs in 4.17 (doesn't repro in 4.16 because orphaned pins wasn't a feature)
Crash occurs when the user attempts to use a struct containing a deleted struct in a blueprint.
RESULT
Crash
Assertion failed: !PinRef->bWasTrashed [File:E:\Release\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp] [Line: 1718] KERNELBASE.dll!UnknownFunction [] UE4Editor-ApplicationCore.dll!FWindowsErrorOutputDevice::Serialize() [e:\release\engine\source\runtime\applicationcore\private\windows\windowserroroutputdevice.cpp:65] UE4Editor-Core.dll!FOutputDevice::Logf__VA() [e:\release\engine\source\runtime\core\private\misc\outputdevice.cpp:70] UE4Editor-Core.dll!FDebug::AssertFailed() [e:\release\engine\source\runtime\core\private\misc\assertionmacros.cpp:409] UE4Editor-Engine.dll!UEdGraphPin::SerializePin() [e:\release\engine\source\runtime\engine\private\edgraph\edgraphpin.cpp:1719] UE4Editor-Engine.dll!UEdGraphPin::Serialize() [e:\release\engine\source\runtime\engine\private\edgraph\edgraphpin.cpp:1497] UE4Editor-Engine.dll!UEdGraphPin::SerializePin() [e:\release\engine\source\runtime\engine\private\edgraph\edgraphpin.cpp:1827] UE4Editor-Engine.dll!UEdGraphPin::SerializePinArray() [e:\release\engine\source\runtime\engine\private\edgraph\edgraphpin.cpp:1663] UE4Editor-Engine.dll!UEdGraphNode::Serialize() [e:\release\engine\source\runtime\engine\private\edgraph\edgraphnode.cpp:443] UE4Editor-BlueprintGraph.dll!UK2Node::Serialize() [e:\release\engine\source\editor\blueprintgraph\private\k2node.cpp:115] UE4Editor-BlueprintGraph.dll!UK2Node_Variable::Serialize() [e:\release\engine\source\editor\blueprintgraph\private\k2node_variable.cpp:30] UE4Editor-BlueprintGraph.dll!UK2Node_MakeStruct::Serialize() [e:\release\engine\source\editor\blueprintgraph\private\k2node_makestruct.cpp:358] UE4Editor-CoreUObject.dll!FArchiveHasReferences::FArchiveHasReferences() [e:\release\engine\source\runtime\coreuobject\private\serialization\archivehasreferences.cpp:46] UE4Editor-CoreUObject.dll!FArchiveHasReferences::GetAllReferencers() [e:\release\engine\source\runtime\coreuobject\private\serialization\archivehasreferences.cpp:87] UE4Editor-CoreUObject.dll!FArchiveHasReferences::GetAllReferencers() [e:\release\engine\source\runtime\coreuobject\private\serialization\archivehasreferences.cpp:68] UE4Editor-UnrealEd.dll!FReplaceReferenceHelper::FindAndReplaceReferences() [e:\release\engine\source\editor\unrealed\private\kismet2\kismetreinstanceutilities.cpp:89] UE4Editor-UnrealEd.dll!FBlueprintCompileReinstancer::ReplaceInstancesOfClass_Inner() [e:\release\engine\source\editor\unrealed\private\kismet2\kismetreinstanceutilities.cpp:2025] UE4Editor-UnrealEd.dll!FBlueprintCompileReinstancer::BatchReplaceInstancesOfClass() [e:\release\engine\source\editor\unrealed\private\kismet2\kismetreinstanceutilities.cpp:1474] UE4Editor-Kismet.dll!FBlueprintCompilationManagerImpl::FlushReinstancingQueueImpl() [e:\release\engine\source\editor\kismet\private\blueprintcompilationmanager.cpp:961] UE4Editor-Kismet.dll!FBlueprintCompilationManagerImpl::CompileSynchronouslyImpl() [e:\release\engine\source\editor\kismet\private\blueprintcompilationmanager.cpp:194] UE4Editor-UnrealEd.dll!FKismetEditorUtilities::CompileBlueprint() [e:\release\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:745] UE4Editor-Kismet.dll!FBlueprintEditor::Compile() [e:\release\engine\source\editor\kismet\private\blueprinteditor.cpp:3193] UE4Editor-Kismet.dll!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl(void)>::Execute() [e:\release\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327] UE4Editor-Kismet.dll!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl(void)>::ExecuteIfSafe() [e:\release\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:434] UE4Editor-Slate.dll!FUICommandList::ExecuteAction() [e:\release\engine\source\runtime\slate\private\framework\commands\uicommandlist.cpp:97] UE4Editor-Slate.dll!SToolBarButtonBlock::OnClicked() [e:\release\engine\source\runtime\slate\private\framework\multibox\stoolbarbuttonblock.cpp:306] UE4Editor-Slate.dll!TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64>::operator()<>() [e:\release\engine\source\runtime\core\public\delegates\delegateinstanceinterface.h:165] UE4Editor-Slate.dll!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64> >() [e:\release\engine\source\runtime\core\public\templates\tuple.h:497] UE4Editor-Slate.dll!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl(void)>::Execute() [e:\release\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327] UE4Editor-Slate.dll!TBaseDelegate<FReply>::Execute() [e:\release\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:537] UE4Editor-Slate.dll!SButton::OnMouseButtonUp() [e:\release\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:282] UE4Editor-Slate.dll!<lambda_1002768c627006711ef2f351a87ec0e7>::operator()() [e:\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5254] UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_1002768c627006711ef2f351a87ec0e7> >() [e:\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:234] UE4Editor-Slate.dll!FSlateApplication::RoutePointerUpEvent() [e:\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5243] UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonUpEvent() [e:\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5745] UE4Editor-Slate.dll!FSlateApplication::OnMouseUp() [e:\release\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5725] UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessDeferredMessage() [e:\release\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1725] UE4Editor-ApplicationCore.dll!FWindowsApplication::DeferMessage() [e:\release\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2171] UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessMessage() [e:\release\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:888] UE4Editor-ApplicationCore.dll!FWindowsApplication::AppWndProc() [e:\release\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:725] USER32.dll!UnknownFunction [] USER32.dll!UnknownFunction [] UE4Editor-ApplicationCore.dll!FWindowsPlatformApplicationMisc::PumpMessages() [e:\release\engine\source\runtime\applicationcore\private\windows\windowsplatformapplicationmisc.cpp:129] UE4Editor.exe!FEngineLoop::Tick() [e:\release\engine\source\runtime\launch\private\launchengineloop.cpp:3219] UE4Editor.exe!GuardedMain() [e:\release\engine\source\runtime\launch\private\launch.cpp:166] UE4Editor.exe!GuardedMainWrapper() [e:\release\engine\source\runtime\launch\private\windows\launchwindows.cpp:134] UE4Editor.exe!WinMain() [e:\release\engine\source\runtime\launch\private\windows\launchwindows.cpp:210] UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253] kernel32.dll!UnknownFunction [] ntdll.dll!UnknownFunction [] ntdll.dll!UnknownFunction []
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