4.12 Preview 4, Attempting to delete Object/Actor in level, and it crashes

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1

Was in the C++ 3rd person project, and attempted to delete one of the walls. This project had just been built, and all that has been done to it, is to drag in one simple blueprint.

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

UE4Editor_CoreUObject!UObjectBase::IsValidLowLevelFast() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:266]
UE4Editor_CoreUObject!TFastReferenceCollector::ProcessObjectArray() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\coreuobject\private\uobject\fastreferencecollector.h:281]
UE4Editor_CoreUObject!TGraphTask::FCollectorTask>::ExecuteTask() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:999]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasks() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:1255]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasksUntilQuit() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:1149]
UE4Editor_Core!FTaskThreadBase::Run() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:621]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:74]

This seems like the second bug report, I’ve filed, that was pointing at the garbage collector.

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2

Hello ,

I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue in a clean project?
  2. If so, could you provide a detailed list of steps to reproduce this issue on our end?
  3. Could you provide any code and/or screen shots of any blueprints that may be involved with this issue?
3

Hello Rudy!

it was a clean project.

Please reference this crash report, which I updated earilier, and think it’s the root issue.

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Please do not make duplicate posts. I will be closing this thread as a duplicate. Adam will continue to assist you on the other thread that you have linked above.

Make it a great day

5

I wasn’t trying to make duplicate posts, as there were a total of 4 bug reports, of which 3, I feel there are 3 that have a common root issue.

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