BUG: IJobForEach_BC -> native array has been declaared as [WriteOnly]

Hi I got the following error:

Spoiler: Error as text

InvalidOperationException: The native container has been declared as [WriteOnly] in the job, but you are reading from it.
Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle.CheckReadAndThrowNoEarlyOut (Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle handle) <0x2294d6ea0d0 + 0x00052> in <3bd64dd808f046b38ba2fb6667d0adc4>:0
Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle.CheckReadAndThrow (Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle handle) (at C:/buildslave/unity/build/Runtime/Export/Jobs/AtomicSafetyHandle.bindings.cs:148)
Unity.Entities.DynamicBuffer`1[T].CheckReadAccess () (at Library/PackageCache/com.unity.entities@0.0.12-preview.33/Unity.Entities/Iterators/DynamicBuffer.cs:93)
Unity.Entities.DynamicBuffer`1[T].get_Item (System.Int32 index) (at Library/PackageCache/com.unity.entities@0.0.12-preview.33/Unity.Entities/Iterators/DynamicBuffer.cs:119)
NextWaypointJob.Execute (Unity.Entities.DynamicBuffer`1[T] path, NavAgent& agent) (at Assets/05 - Scripts/00 - Gameplay/Navigation/NavAgentSystem.cs:160)
Unity.Entities.JobForEachExtensions+JobStruct_Process_BC`3[T,T0,T1].ExecuteChunk (Unity.Entities.JobForEachExtensions+JobStruct_Process_BC`3[T,T0,T1]& jobData, System.IntPtr bufferRangePatchData, System.Int32 begin, System.Int32 end, Unity.Entities.ArchetypeChunk* chunks, System.Int32* entityIndices) (at Library/PackageCache/com.unity.entities@0.0.12-preview.33/Unity.Entities/IJobForEach.gen.cs:2194)
Unity.Entities.JobForEachExtensions+JobStruct_Process_BC`3[T,T0,T1].Execute (Unity.Entities.JobForEachExtensions+JobStruct_Process_BC`3[T,T0,T1]& jobData, System.IntPtr additionalPtr, System.IntPtr bufferRangePatchData, Unity.Jobs.LowLevel.Unsafe.JobRanges& ranges, System.Int32 jobIndex) (at Library/PackageCache/com.unity.entities@0.0.12-preview.33/Unity.Entities/IJobForEach.gen.cs:2161)

Here is my code

Code (CSharp):

1. struct NextWaypointJob : IJobForEach_BC<NavAgentPath, NavAgent> {
2.     public void Execute([ReadOnly] DynamicBuffer<NavAgentPath> path, ref NavAgent agent) {
3.         if (agent.remainingDistance - agent.stoppingDistance > 0 || agent.status != AgentStatus.Moving) {
4.             return;
5.         }
6.  
7.         if (agent.nextWaypointIndex != agent.totalWaypoints) {
8.             agent.currentWaypoint = path[agent.nextWaypointIndex].Value; // exception here (line 160)
9.             agent.remainingDistance = math.length(agent.position - agent.currentWaypoint);
10.             agent.nextWaypointIndex++;
11.         } else {
12.             agent.totalWaypoints = 0;
13.             agent.currentWaypoint = 0;
14.             agent.status = AgentStatus.Idle;
15.         }
16.     }
17. }
18.  

 

see also
https://forum.unity.com/threads/ijobforeach_b-dynamic-buffer-is-write-only.681667/