Description

This JIRA is being entered as a result of it being one of the top crashes occurring in 4.13 Preview 1.

Error message:

Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 833] Array index out of bounds: 7778 from an array of size 7776

Source Context:

   59       check(Runnable);
   60       
   61       // Initialize the runnable object
   62       if (Runnable->Init() == true)
   63       {
   64       // Initialization has completed, release the sync event
   65       ThreadInitSyncEvent->Trigger();
   66       
   67       // Setup TLS for this thread, used by FTlsAutoCleanup objects.
   68       SetTls();
   69       
   70       // Now run the task that needs to be done
   71       ExitCode = Runnable->Run();
   72       // Allow any allocated resources to be cleaned up
   73 ***** Runnable->Exit();
   74       
   75       #if STATS
   76       FThreadStats::Shutdown();
   77       #endif
   78       FreeTls();
   79       }
   80       else
   81       {
   82       // Initialization has failed, release the sync event
   83       ThreadInitSyncEvent->Trigger();
   84       }
   85       
   86       return ExitCode;
   87       }
   88       

Most recent user affected CL: 3072953

Logs:
[Link Removed]
[Link Removed]
[Link Removed]

Steps to Reproduce
  1. Download and extract the attached .zip
  2. Open the editor
  3. Import the Unreal alembic test.abc file

Result: Editor Crashes

Callstack
UE4Editor_AlembicLibrary!AbcImporterUtilities::GenerateSmoothingGroupsIndices()
UE4Editor_AlembicLibrary!FAbcMeshDataImportRunnable::Run()
UE4Editor_Core!FRunnableThreadWin::Run() [windowsrunnablethread.cpp:74]

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Fixed
ComponentGameplay
Affects Versions4.13
Target Fix4.13
Fix Commit3080813
Main Commit3092051
Release Commit3080813
CreatedAug 5, 2016
ResolvedAug 8, 2016
UpdatedApr 27, 2018