IndexOutOfBoundsException.cs

//IndexOutOfRangeException: Index 2 is out of range of '2' Length.
//Unity.Collections.NativeArray`1[T].FailOutOfRangeError (System.Int32 index) (at /Users/builduser/buildslave/unity/build/Runtime/Export/NativeArray/NativeArray.cs:255)
//Unity.Collections.NativeArray`1[T].CheckElementReadAccess (System.Int32 index) (at /Users/builduser/buildslave/unity/build/Runtime/Export/NativeArray/NativeArray.cs:115)
//Unity.Collections.NativeArray`1[T].get_Item (System.Int32 index) (at /Users/builduser/buildslave/unity/build/Runtime/Export/NativeArray/NativeArray.cs:140)
//Unity.Transforms.TRSToLocalToWorldSystem+TRSToLocalToWorld.Execute (Unity.Entities.ArchetypeChunk chunk, System.Int32 chunkIndex, System.Int32 entityOffset) (at Packages/com.unity.entities/Unity.Transforms/TRSToLocalToWorldSystem.cs:95)
//Unity.Entities.JobChunkExtensions+JobChunk_Process`1[T].ExecuteInternal (Unity.Entities.JobChunkExtensions+JobChunkData`1[T]& jobData, Unity.Jobs.LowLevel.Unsafe.JobRanges& ranges, System.Int32 jobIndex) (at Packages/com.unity.entities/Unity.Entities/IJobChunk.cs:208)
//Unity.Entities.JobChunkExtensions+JobChunk_Process`1[T].Execute (Unity.Entities.JobChunkExtensions+JobChunkData`1[T]& jobData, System.IntPtr additionalPtr, System.IntPtr bufferRangePatchData, Unity.Jobs.LowLevel.Unsafe.JobRanges& ranges, System.Int32 jobIndex) (at Packages/com.unity.entities/Unity.Entities/IJobChunk.cs:194)

using Unity.Burst;
using Unity.Collections;
using Unity.Entities;
using Unity.Jobs;
using Unity.Transforms;

[UpdateInGroup(typeof(InitializationSystemGroup))]
public class SphereSpawner : JobComponentSystem
{
    struct ExecuteOnceTag : IComponentData {}
    
    [BurstCompile]
    struct Spawn : IJobParallelFor
    {
        public EntityCommandBuffer.Concurrent ec;
        public Entity prefab;
        
        public void Execute(int index)
        {
            ec.Instantiate(index, prefab);
        }
    }

    private Entity m_spherePrefabEntity;
    private Entity m_initEntity;
    
    protected override void OnCreate()
    {
        if (SphereSpawnerUnity.instance != null)
        {
            m_initEntity = EntityManager.CreateEntity();
            EntityManager.AddComponent<ExecuteOnceTag>(m_initEntity);
            
            var spherePrefabArchetype = EntityManager.CreateArchetype(typeof(Translation), typeof(LocalToWorld));
            m_spherePrefabEntity = EntityManager.CreateEntity(spherePrefabArchetype);
        }

        var query = GetEntityQuery(ComponentType.ReadOnly<ExecuteOnceTag>());
        RequireForUpdate(query);
    }
    
    protected override JobHandle OnUpdate(JobHandle inputDeps)
    {
        EntityManager.DestroyEntity(m_initEntity);
        m_initEntity = Entity.Null;

        EntityCommandBuffer ecb;
        EntityCommandBufferSystem ecbSystem;
        
        ecbSystem = World.GetOrCreateSystem<EndSimulationEntityCommandBufferSystem>();
      //  ecbSystem = World.GetOrCreateSystem<EndInitializationEntityCommandBufferSystem>(); // this will fix the bug
        ecb = ecbSystem.CreateCommandBuffer();
        
        var sp = new Spawn
        {
            ec = ecb.ToConcurrent(),
            prefab = m_spherePrefabEntity
        };

        var handle = inputDeps;
        handle = sp.Schedule(1024, 128, inputDeps);
        ecbSystem.AddJobHandleForProducer(handle);
        
        return handle;
    }
}