Trying to understand a memory leak with nativearray and raycastcommand

I assume I just can't do this, but wanted to verify it's not something I can fix, because it works most of the time, but also throws errors periodically.

After performing a batch of raycasts, I try to use parallel linq to iterate over them and it often works, but kicks off a bunch of warnings about memory leaks AFTER it's run:

Unity 2019.2.6f1
I enabled full stack trace, but not sure what's wrong.

Warnings:

After it runs a bunch of times, it starts throwing:
Error:

Code (CSharp):

1. InvalidOperationException: You are not allowed to access a NativeArray outside the main thread and job threads.
2. Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle.CheckReadAndThrowNoEarlyOut (Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle handle) <0x1960f774590 + 0x00052> in <e3232360d51c46c786dd547e2f0b3f8b>:0
3. Unity.Collections.NativeSlice`1[T].CheckReadIndex (System.Int32 index) (at C:/buildslave/unity/build/Runtime/Export/NativeArray/NativeSlice.cs:179)
4. Unity.Collections.NativeSlice`1[T].get_Item (System.Int32 index) (at C:/buildslave/unity/build/Runtime/Export/NativeArray/NativeSlice.cs:200)
5. Unity.Collections.NativeSlice`1+Enumerator[T].get_Current () <0x1960f773b00 + 0x000ba> in <e3232360d51c46c786dd547e2f0b3f8b>:0
6. System.Linq.Parallel.PartitionedDataSource`1+ContiguousChunkLazyEnumerator[T].MoveNext (T& currentElement, System.Int32& currentKey) (at <fbb5ed17eb6e46c680000f8910ebb50c>:0)
7. System.Linq.Parallel.WhereQueryOperator`1+WhereQueryOperatorEnumerator`1[TInputOutput,TKey].MoveNext (TInputOutput& currentElement, TKey& currentKey) (at <fbb5ed17eb6e46c680000f8910ebb50c>:0)
8. System.Linq.Parallel.ForAllOperator`1+ForAllEnumerator`1[TInput,TKey].MoveNext (TInput& currentElement, System.Int32& currentKey) (at <fbb5ed17eb6e46c680000f8910ebb50c>:0)
9. System.Linq.Parallel.ForAllSpoolingTask`2[TInputOutput,TIgnoreKey].SpoolingWork () (at <fbb5ed17eb6e46c680000f8910ebb50c>:0)

Code (CSharp):

1. void ProcessRaycasts(Ray[] rays)
2.     {
3.         var results = new NativeArray<RaycastHit>(rays.Length, Allocator.TempJob);
4.         var commands = new NativeArray<RaycastCommand>(rays.Length, Allocator.TempJob);
5.  
6.         for (int i = 0, b = rays.Length; i < b; i++)
7.         {
8.             commands[i] = new RaycastCommand(rays[i].origin, rays[i].direction);
9.         }
10.         // Schedule the batch of raycasts
11.         JobHandle handle = RaycastCommand.ScheduleBatch(commands, results, 1, default(JobHandle));
12.  
13.         // Wait for the batch processing job to complete
14.         handle.Complete();
15.              
16.         //Sizes must match for Slice to work.      
17.         if (Marshal.SizeOf(typeof(HitInfo)) != Marshal.SizeOf(typeof(RaycastHit)))
18.         {
19.             Debug.Log("Not Equal: " + Marshal.SizeOf(typeof(HitInfo)) + " : " + Marshal.SizeOf(typeof(RaycastHit)));
20.             throw new Exception("Sizes don't match");
21.         }
22.      
23.         //Convert RaycastHit to HitInfo to attempt using in parallel
24.         var data = results.Slice(0, results.Length).SliceConvert<HitInfo>();
25.  
26.  
27.         /******************************************************************************/
28.  
29.         var parallelQuery = from num in data.AsParallel()
30.                             where num.m_Collider > 0
31.                             select num;        //Run query
32.  
33.  
34.         parallelQuery.ForAll((e) => {
35.             if (Hits.TryAdd(m_ColliderMap[e.m_Collider], e))
36.             {
37.                 Debug.Log("Success adding hit ");
38.             } else
39.             {
40.                 Debug.Log("Failed: Already in array");
41.             }
42.         });
43.         /****************************************************************************/
44.  
45.      
46.         // Dispose the buffers
47.         results.Dispose();
48.         commands.Dispose();
49.     }

Sample Scene and script setup, just play, click the mouse and look at log:

I'm wondering if it's the Slice that's not getting cleaned up? Or is this a case of "not supposed to do that", or just a bug?