Compiling blueprints seems to randomly crash with a EXCEPTION_ACCESS_VIOLATION and a random address.
An example of the latest i got is below (debug symbols enabled):
Fatal error!
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000d
0x00007ffbd77894af UE4Editor-CoreUObject.dll!FDuplicateDataWriter::GetDuplicatedObject() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\Serialization\DuplicateDataWriter.cpp:125]
0x00007ffbd778966d UE4Editor-CoreUObject.dll!FDuplicateDataWriter::GetDuplicatedObject() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\Serialization\DuplicateDataWriter.cpp:136]
0x00007ffbd776bf21 UE4Editor-CoreUObject.dll!FDuplicateDataWriter::operator<<() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\Serialization\DuplicateDataWriter.cpp:67]
0x00007ffbd7a0c40d UE4Editor-CoreUObject.dll!FDelegateProperty::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\PropertyDelegate.cpp:164]
0x00007ffbd78b999c UE4Editor-CoreUObject.dll!UStruct::SerializeProperties() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:1768]
0x00007ffbd78b44cc UE4Editor-CoreUObject.dll!UStruct::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:1846]
0x00007ffbd78b3cfe UE4Editor-CoreUObject.dll!UFunction::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:5555]
0x00007ffbd7a71272 UE4Editor-CoreUObject.dll!StaticDuplicateObjectEx() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:2055]
0x00007ffbd7a7086f UE4Editor-CoreUObject.dll!StaticDuplicateObject() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1961]
0x00007ffbc1627fb2 UE4Editor-UnrealEd.dll!FBlueprintCompileReinstancer::MoveCDOToNewClass() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Kismet2\KismetReinstanceUtilities.cpp:1547]
0x00007ffbc059250d UE4Editor-Kismet.dll!MoveSkelCDOAside() [D:\Build\++UE4\Sync\Engine\Source\Editor\Kismet\Private\BlueprintCompilationManager.cpp:2973]
0x00007ffbc056bb67 UE4Editor-Kismet.dll!FBlueprintCompilationManagerImpl::FlushCompilationQueueImpl() [D:\Build\++UE4\Sync\Engine\Source\Editor\Kismet\Private\BlueprintCompilationManager.cpp:846]
0x00007ffbc0516b5f UE4Editor-Kismet.dll!FBlueprintCompilationManagerImpl::CompileSynchronouslyImpl() [D:\Build\++UE4\Sync\Engine\Source\Editor\Kismet\Private\BlueprintCompilationManager.cpp:263]
0x00007ffbc05168a1 UE4Editor-Kismet.dll!FBlueprintCompilationManager::CompileSynchronously() [D:\Build\++UE4\Sync\Engine\Source\Editor\Kismet\Private\BlueprintCompilationManager.cpp:3040]
0x00007ffbc15fb1de UE4Editor-UnrealEd.dll!FKismetEditorUtilities::CompileBlueprint() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Kismet2\Kismet2.cpp:754]
0x00007ffbc0616b20 UE4Editor-Kismet.dll!FBlueprintEditor::Compile() [D:\Build\++UE4\Sync\Engine\Source\Editor\Kismet\Private\BlueprintEditor.cpp:3474]
0x00007ffbc063255e UE4Editor-Kismet.dll!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl(void)>::ExecuteIfSafe() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:374]
0x00007ffbd410f238 UE4Editor-Slate.dll!FUICommandList::ExecuteAction() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Commands\UICommandList.cpp:102]
0x00007ffbd41fb0a9 UE4Editor-Slate.dll!SToolBarButtonBlock::OnClicked() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\MultiBox\SToolBarButtonBlock.cpp:302]
0x00007ffbd41dae07 UE4Editor-Slate.dll!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl(void)>::Execute() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298]
0x00007ffbd427207e UE4Editor-Slate.dll!SButton::ExecuteOnClick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SButton.cpp:385]
0x00007ffbd428b27e UE4Editor-Slate.dll!SButton::OnMouseButtonUp() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SButton.cpp:304]
0x00007ffbd40d2dc8 UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_cc5aea9e7377b04ce85c30c65ec3889b> >() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:372]
0x00007ffbd41569cf UE4Editor-Slate.dll!FSlateApplication::RoutePointerUpEvent() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:4675]
0x00007ffbd413f4b2 UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonUpEvent() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5198]
0x00007ffbd4132392 UE4Editor-Slate.dll!FSlateApplication::OnMouseUp() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5166]
0x00007ffbfed97f88 UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessDeferredMessage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2140]
0x00007ffbfed85c87 UE4Editor-ApplicationCore.dll!FWindowsApplication::DeferMessage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2592]
0x00007ffbfed9a619 UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessMessage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:1816]
0x00007ffbfed817d0 UE4Editor-ApplicationCore.dll!FWindowsApplication::AppWndProc() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:852]
0x00007ffc37c5e6d8 USER32.dll!UnknownFunction []
0x00007ffc37c5e119 USER32.dll!UnknownFunction []
0x00007ffbfed9bb34 UE4Editor-ApplicationCore.dll!FWindowsPlatformApplicationMisc::PumpMessages() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsPlatformApplicationMisc.cpp:130]
0x00007ff662b368c4 UE4Editor.exe!FEngineLoop::Tick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4762]
0x00007ff662b4ba7c UE4Editor.exe!GuardedMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:169]
0x00007ff662b4bb5a UE4Editor.exe!GuardedMainWrapper() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137]
0x00007ff662b5e31d UE4Editor.exe!WinMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268]
0x00007ff662b6145a UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
0x00007ffc38937034 KERNEL32.DLL!UnknownFunction []
0x00007ffc38efcec1 ntdll.dll!UnknownFunction []
This started happening a lot more frequently after updating to 4.25, but i can’t pinpoint it to something in particular. It’s been going on for a while now and really getting on my nerves, i have to compulsively save every time to avoid losing progress…
Anyone has any idea why is it happening? I’ve submitted plenty bug reports and logs via the automated thingy and the “new bug reporting method using a more structured form” but obviously i never got a reply.