This is a somewhat common crash in 4.17. Users have not provided any descriptions of their actions when the crash occurred.
Source Context
304 int32 FUObjectArray::AllocateSerialNumber(int32 Index)
305 {
306 ***** FUObjectItem* ObjectItem = IndexToObject(Index);
307 checkSlow(ObjectItem);
308
309 volatile int32 *SerialNumberPtr = &ObjectItem->SerialNumber;
310 int32 SerialNumber = *SerialNumberPtr;
311 if (!SerialNumber)
312 {
313 SerialNumber = MasterSerialNumber.Increment();
314 UE_CLOG(SerialNumber <= START_SERIAL_NUMBER, LogUObjectArray, Fatal, TEXT("UObject serial numbers overflowed (trying to allocate serial number %d)."), SerialNumber);
315 int32 ValueWas = FPlatformAtomics::InterlockedCompareExchange((int32*)SerialNumberPtr, SerialNumber, 0);
316 if (ValueWas != 0)
317 {
318 // someone else go it first, use their value
319 SerialNumber = ValueWas;
320 }
321 }
repro steps currently unknown
Assertion failed: Index >= 0 [File:D:\Build\++UE4+Release-4.17+Compile\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject/UObjectArray.h] [Line: 445] UE4Editor_CoreUObject!FUObjectArray::AllocateSerialNumber() [uobjectarray.cpp:307] UE4Editor_CoreUObject!FWeakObjectPtr::operator=() [weakobjectptr.cpp:30] UE4Editor_UnrealEd!UnFbx::FFbxImporter::ImportStaticMeshAsSingle() [fbxstaticmeshimport.cpp:1094] UE4Editor_UnrealEd!UFbxFactory::ImportANode() [fbxfactory.cpp:124] UE4Editor_UnrealEd!UFbxFactory::RecursiveImportNode() [fbxfactory.cpp:739] UE4Editor_UnrealEd!UFbxFactory::RecursiveImportNode() [fbxfactory.cpp:758] UE4Editor_UnrealEd!UFbxFactory::FactoryCreateBinary() [fbxfactory.cpp:420] UE4Editor_UnrealEd!UFactory::FactoryCreateFile() [factory.cpp:87] UE4Editor_UnrealEd!UFactory::ImportObject() [factory.cpp:170] UE4Editor_AssetTools!UAssetToolsImpl::ImportAssetsInternal() [assettools.cpp:1532] UE4Editor_AssetTools!UAssetToolsImpl::ImportAssets() [assettools.cpp:780] UE4Editor_AssetTools!UAssetToolsImpl::ImportAssetsWithDialog() [assettools.cpp:658] UE4Editor_ContentBrowser!SContentBrowser::ImportAsset() [scontentbrowser.cpp:847] UE4Editor_ContentBrowser!SContentBrowser::HandleImportClicked() [scontentbrowser.cpp:838] UE4Editor_ContentBrowser!TMemberFunctionCaller<SContentBrowser,FReply() [delegateinstanceinterface.h:165] UE4Editor_ContentBrowser!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SContentBrowser,FReply() [tuple.h:497] UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,FReply __cdecl() [delegateinstancesimpl.h:327] UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:537] UE4Editor_Slate!SButton::OnMouseButtonUp() [sbutton.cpp:282] UE4Editor_Slate!<lambda_1002768c627006711ef2f351a87ec0e7>::operator() [slateapplication.cpp:5199] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_1002768c627006711ef2f351a87ec0e7> >() [slateapplication.cpp:232] UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:5188] UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5690] UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5670] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1718] UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2161] UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:881] UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:721] user32!UserCallWinProcCheckWow() user32!DispatchMessageWorker() UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:1009] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3151] 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()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-50105 in the post.
| 0 |
| Component | UE - Editor - Content Pipeline - Import and Export |
|---|---|
| Affects Versions | 4.17, 4.19 |
| Created | Sep 20, 2017 |
|---|---|
| Resolved | Nov 4, 2020 |
| Updated | Dec 9, 2020 |