Description

This is a common crash affecting users in 4.16. Users have not provided additional information.

Source Context

	// Set the parent index, if this export represents a UStruct-derived object
 4589       						if (UStruct* Struct = dynamic_cast<UStruct*>(Export.Object))
 4590       						{
 4591       							if (Struct->GetSuperStruct() != nullptr)
 4592       							{
 4593       								Export.SuperIndex = Linker->MapObject(Struct->GetSuperStruct());
 4594       								check(!Export.SuperIndex.IsNull());
 4595       							}
 4596 ***** 							else
 4597       							{
 4598       								Export.SuperIndex = FPackageIndex();
 4599       							}
 4600       						}
Steps to Reproduce

repro steps currently unknown

Callstack
Assertion failed: !Export.SuperIndex.IsNull() [File:D:\Build\++UE4+Release-4.16+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\SavePackage.cpp] [Line: 4595]

UE4Editor_CoreUObject!UPackage::Save() [savepackage.cpp:4597]
UE4Editor_UnrealEd!UEditorEngine::Save() [editorengine.cpp:4185]
UE4Editor_UnrealEd!UEditorEngine::SavePackage() [editorengine.cpp:4243]
UE4Editor_UnrealEd!UEditorEngine::Exec_Obj() [editorserver.cpp:4560]
UE4Editor_UnrealEd!UEditorEngine::Exec() [editorserver.cpp:5655]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() [unrealedsrv.cpp:670]
UE4Editor_UnrealEd!FEditorFileUtils::AutosaveContentPackagesEx() [filehelpers.cpp:2516]
UE4Editor_UnrealEd!FPackageAutoSaver::AttemptAutoSave() [packageautosaver.cpp:206]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [unrealedengine.cpp:414]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3119]
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!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()

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Cannot Reproduce
ComponentGameplay - Blueprint Compiler
Affects Versions4.134.144.154.16
Target Fix4.18
Fix Commit3546855
Main Commit3596628
Release Commit3672808
CreatedJul 14, 2017
ResolvedSep 29, 2017
UpdatedApr 27, 2018