Description

This is an infrequent crash that has occurred for a few users exclusively in 4.17.1 (possible regression from 4.17.0?). Users have not provided any descriptions of their actions when the crash occurred.

Source Context

121       void FMallocTBB::Free( void* Ptr )
  122       {
  123       if( !Ptr )
  124       {
  125       return;
  126       }
  127       MEM_TIME(MemTime -= FPlatformTime::Seconds())
  128       #if UE_BUILD_DEBUG || UE_BUILD_DEVELOPMENT
  129 ***** FMemory::Memset(Ptr, DEBUG_FILL_FREED, scalable_msize(Ptr)); 
  130       #endif
  131       IncrementTotalFreeCalls();
  132       scalable_free(Ptr);
Steps to Reproduce

repro steps currently unknown

Callstack
Access violation - code c0000005 (first/second chance not available)

UE4Editor_Core!rml::internal::Block::findObjectSize()
UE4Editor_Core!FMallocTBB::Free() [malloctbb.cpp:130]
UE4Editor_Core!FMemory::Free() [fmemory.inl:75]
UE4Editor_Engine!UBlueprintGeneratedClass::DestroyPersistentUberGraphFrame() [blueprintgeneratedclass.cpp:1269]
UE4Editor_CoreUObject!UObject::DestroyNonNativeProperties() [blueprintsupport.cpp:2170]
UE4Editor_CoreUObject!UObject::FinishDestroy() [obj.cpp:742]
UE4Editor_CoreUObject!UObject::ConditionalFinishDestroy() [obj.cpp:935]
UE4Editor_CoreUObject!IncrementalPurgeGarbage() [garbagecollection.cpp:977]
UE4Editor_CoreUObject!CollectGarbageInternal() [garbagecollection.cpp:1509]
UE4Editor_CoreUObject!CollectGarbage() [garbagecollection.cpp:1533]
UE4Editor_Kismet!FBlueprintCompilationManagerImpl::CompileSynchronouslyImpl() [blueprintcompilationmanager.cpp:203]
UE4Editor_UnrealEd!FKismetEditorUtilities::CompileBlueprint() [kismet2.cpp:750]
UE4Editor_Kismet!FBlueprintEditor::Compile() [blueprinteditor.cpp:3291]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_Slate!FUICommandList::ExecuteAction() [uicommandlist.cpp:97]
UE4Editor_Slate!SToolBarButtonBlock::OnClicked() [stoolbarbuttonblock.cpp:305]
UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply() [delegateinstanceinterface.h:165]
UE4Editor_Slate!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SToolBarButtonBlock,FReply() [tuple.h:497]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,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!<Unknown>
user32!<Unknown>
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!<Unknown>
ntdll!<Unknown>

Have Comments or More Details?

There's no existing public thread on this issue, so head over toAnswerHub just mention UE-49455 in the post.

0
Login to Vote

Cannot Reproduce
ComponentGameplay - Blueprint
Affects Versions4.17.1
Target Fix4.18
Fix Commit3663202
Release Commit3663202
CreatedSep 7, 2017
ResolvedSep 25, 2017
UpdatedApr 27, 2018