UE crashed - Runnable thread TaskGraphThreadNP 0 crashed

Development Platform & Builds
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1

Hello.
A new crash occured on BP compilation:

Logs

[2016.06.11-13.34.31:462][181]LogThreadingWindows:Error: Runnable thread TaskGraphThreadNP 0 crashed.
[2016.06.11-13.34.31:462][181]LogCrashTracker:

[2016.06.11-13.34.31:462][181]LogWindows:Error: === Critical error: ===
Fatal error: [File:e:\UnrealEngine\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp] [Line: 539]
Invalid object in GC: 0xcdcdcdcdcdcdcdcd, ReferencingObject: BuldModeUI_C /Game/Levels/BaseLevel/BuildMode/UI/BuldModeUI.Default__BuldModeUI_C, ReferencingObjectClass: WidgetBlueprintGeneratedClass /Game/Levels/BaseLevel/BuildMode/UI/BuldModeUI.BuldModeUI_C, Property Name: JsonMainObj, Offset: 2120, TokenIndex: 19

KERNELBASE.dll
UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() [e:\unrealengine\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:102]
UE4Editor-Core.dll!FOutputDevice::Logf__VA() [e:\unrealengine\engine\source\runtime\core\private\misc\outputdevice.cpp:154]
UE4Editor-Core.dll!FDebug::AssertFailed() [e:\unrealengine\engine\source\runtime\core\private\misc\outputdevice.cpp:440]
UE4Editor-CoreUObject.dll!TFastReferenceCollector<FGCReferenceProcessor,FGCCollector,FGCArrayPool,0>::ProcessObjectArray() [e:\unrealengine\engine\source\runtime\coreuobject\private\uobject\fastreferencecollector.h:281]
UE4Editor-CoreUObject.dll!TGraphTask<TFastReferenceCollector<FGCReferenceProcessor,FGCCollector,FGCArrayPool,0>::FCollectorTask>::ExecuteTask() [e:\unrealengine\engine\source\runtime\core\public\async\taskgraphinterfaces.h:999]
UE4Editor-Core.dll!FTaskThreadAnyThread::ProcessTasks() [e:\unrealengine\engine\source\runtime\core\private\async\taskgraph.cpp:1255]
UE4Editor-Core.dll!FTaskThreadAnyThread::ProcessTasksUntilQuit() [e:\unrealengine\engine\source\runtime\core\private\async\taskgraph.cpp:1149]
UE4Editor-Core.dll!FTaskThreadBase::Run() [e:\unrealengine\engine\source\runtime\core\private\async\taskgraph.cpp:621]
UE4Editor-Core.dll!FRunnableThreadWin::Run() [e:\unrealengine\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:74]
UE4Editor-Core.dll!FRunnableThreadWin::GuardedRun() [e:\unrealengine\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:31]
KERNEL32.DLL
ntdll.dll
ntdll.dll
2

Hey Arthur,

  • Can you reproduce this issue in a clean project?

  • If you are able to reproduce this issue, could you please provide the full steps you used to reproduce it in a clean project?

  • Are you getting a Crash Reporter window? If so, please provide your Machine ID from the window and ensure to hit Send & Close on the report.

3

Hey Arthur,

  • Can you reproduce this issue in a clean project?

  • If you are able to reproduce this issue, could you please provide the full steps you used to reproduce it in a clean project?

  • Are you getting a Crash Reporter window? If so, please provide your Machine ID from the window and ensure to hit Send & Close on the report.

4

Hello,

I am marking this topic as resolved for tracking purposes, as we have not heard from you in a few days. If this issue persists, feel free to respond to this thread. For any new issues, please create a new Answerhub topic.

Have a great day