[Bug?Help?] Burst and custom jobs

-edit2-

Solved it by adding a dummy TValue parameter to the interface but I don't know why this is required.

Code (CSharp):

1.     [JobProducerType(typeof(JobNativeMultiHashMapVisitUniqueKey.NativeMultiHashMapVisitUniqueKeyJobStruct<,,>))]
2.     public interface IJobNativeMultiHashMapVisitUniqueKey<TKey, TValue>
3.         where TKey : struct, IEquatable<TKey>
4.         where TValue : struct
5.     {
6.         void ExecuteNext(TKey key);
7.     }

I feel like i'm either overlooking something or something is a little off.

-original-

I wrote a simple custom job,
IJobNativeMultiHashMapVisitUniqueKey<T>

Which is basically just a copy of
IJobNativeMultiHashMapVisitKeyValue except only it only visits the first key

Code (CSharp):

1. // <copyright file="IJobNativeMultiHashMapVisitUniqueKey.cs" company="BovineLabs">
2. //     Copyright (c) BovineLabs. All rights reserved.
3. // </copyright>
4.  
5. namespace BovineLabs.Common.Collections
6. {
7.     using System;
8.     using Unity.Collections;
9.     using Unity.Collections.LowLevel.Unsafe;
10.     using Unity.Jobs;
11.     using Unity.Jobs.LowLevel.Unsafe;
12.  
13.     [JobProducerType(typeof(JobNativeMultiHashMapVisitUniqueKey.NativeMultiHashMapVisitUniqueKeyJobStruct<,,>))]
14.     public interface IJobNativeMultiHashMapVisitUniqueKey<in TKey>
15.         where TKey : struct, IEquatable<TKey>
16.     {
17.         void ExecuteNext(TKey key);
18.     }
19.  
20.     public static class JobNativeMultiHashMapVisitUniqueKey
21.     {
22.         internal struct NativeMultiHashMapVisitUniqueKeyJobStruct<TJob, TKey, TValue>
23.             where TJob : struct, IJobNativeMultiHashMapVisitUniqueKey<TKey>
24.             where TKey : struct, IEquatable<TKey>
25.             where TValue : struct
26.         {
27.             [ReadOnly]
28.             public NativeMultiHashMapImposter<TKey, TValue> HashMap;
29.  
30.             public TJob JobData;
31.  
32.             // ReSharper disable once StaticMemberInGenericType
33.             private static IntPtr JobReflectionData;
34.  
35.             public static IntPtr Initialize()
36.             {
37.                 if (JobReflectionData == IntPtr.Zero)
38.                 {
39.                     JobReflectionData = JobsUtility.CreateJobReflectionData(
40.                         typeof(NativeMultiHashMapVisitUniqueKeyJobStruct<TJob, TKey, TValue>),
41.                         typeof(TJob),
42.                         JobType.ParallelFor,
43.                         (ExecuteJobFunction)Execute);
44.                 }
45.  
46.                 return JobReflectionData;
47.             }
48.  
49.             public delegate void ExecuteJobFunction(
50.                 ref NativeMultiHashMapVisitUniqueKeyJobStruct<TJob, TKey, TValue> fullData,
51.                 IntPtr additionalPtr,
52.                 IntPtr bufferRangePatchData,
53.                 ref JobRanges ranges,
54.                 int jobIndex);
55.  
56.             public static unsafe void Execute(
57.                 ref NativeMultiHashMapVisitUniqueKeyJobStruct<TJob, TKey, TValue> fullData,
58.                 IntPtr additionalPtr,
59.                 IntPtr bufferRangePatchData,
60.                 ref JobRanges ranges,
61.                 int jobIndex)
62.             {
63.                 while (true)
64.                 {
65.                     if (!JobsUtility.GetWorkStealingRange(ref ranges, jobIndex, out var begin, out var end))
66.                     {
67.                         return;
68.                     }
69.  
70.                     var buckets = (int*)fullData.HashMap.Buffer->Buckets;
71.                     var keys = fullData.HashMap.Buffer->Keys;
72.  
73.                     for (int i = begin; i < end; i++)
74.                     {
75.                         int entryIndex = buckets[i];
76.  
77.                         if (entryIndex != -1)
78.                         {
79.                             var key = UnsafeUtility.ReadArrayElement<TKey>(keys, entryIndex);
80.                             fullData.JobData.ExecuteNext(key);
81.                         }
82.                     }
83.                 }
84.             }
85.         }
86.  
87.         public static unsafe JobHandle Schedule<TJob, TKey, TValue>(
88.             this TJob jobData,
89.             NativeMultiHashMap<TKey, TValue> hashMap,
90.             int minIndicesPerJobCount,
91.             JobHandle dependsOn = default)
92.             where TJob : struct, IJobNativeMultiHashMapVisitUniqueKey<TKey>
93.             where TKey : struct, IEquatable<TKey>, IComparable<TKey>
94.             where TValue : struct
95.         {
96.             var imposter = (NativeMultiHashMapImposter<TKey, TValue>)hashMap;
97.  
98.             var fullData = new NativeMultiHashMapVisitUniqueKeyJobStruct<TJob, TKey, TValue>
99.             {
100.                 HashMap = imposter,
101.                 JobData = jobData,
102.             };
103.  
104.             var scheduleParams = new JobsUtility.JobScheduleParameters(
105.                 UnsafeUtility.AddressOf(ref fullData),
106.                 NativeMultiHashMapVisitUniqueKeyJobStruct<TJob, TKey, TValue>.Initialize(),
107.                 dependsOn,
108.                 ScheduleMode.Batched);
109.  
110.             return JobsUtility.ScheduleParallelFor(
111.                 ref scheduleParams,
112.                 imposter.Buffer->BucketCapacityMask + 1,
113.                 minIndicesPerJobCount);
114.         }
115.     }
116. }

It works fine in editor; appears to burst compile fine but as soon as I try to make a proper build burst throws errors even on an empty job

Code (CSharp):

1.     [BurstCompile]
2.     public struct TESTJOB : IJobNativeMultiHashMapVisitUniqueKey<int>
3.     {
4.         public void ExecuteNext(int key)
5.         {
6.         }
7.     }

with a very unhelpful error.

Code (CSharp):

1. BuildFailedException: Burst compiler (1.1.2) failed running
2.  
3. stdout:
4. Unexpected exception while processing type `BovineLabs.Vision.Jobs.TESTJOB`
5. stderr:
6. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
7.    at Mono.Collections.Generic.Collection`1.get_Item(Int32 index)
8.    at Burst.Compiler.IL.Syntax.GenericContext.Resolve(TypeReference typeReference)
9.    at Burst.Compiler.IL.Syntax.GenericContext.Resolve(TypeReference typeReference)
10.    at Burst.Compiler.IL.Syntax.GenericContext.Resolve(TypeReference typeReference)
11.    at Burst.Bcl.BclApp.FullyResolve(TypeReference tyRef, GenericContext ctx)
12.    at Burst.Bcl.BclApp.FullyResolve(MethodReference methodRef)
13.    at Burst.Bcl.BclApp.HashMethod(MethodReference methodRef)
14.    at Burst.Bcl.BclApp.FindExecuteMethods(List`1 rootAssemblyPaths)
15.  

Can anyone spot anything I'm doing wrong?

-edit-

got a slightly more detailed error opening burst inspector

Code (CSharp):

1. ArgumentException: The number of generic arguments provided doesn't equal the arity of the generic type definition.
2. Parameter name: instantiation
3. System.RuntimeType.MakeGenericType (System.Type[] instantiation) (at <ad04dee02e7e4a85a1299c7ee81c79f6>:0)
4. Unity.Burst.Editor.BurstReflection.FindExecuteMethods (UnityEditor.Compilation.AssembliesType assemblyTypes) (at Library/PackageCache/com.unity.burst@1.1.2/Editor/BurstReflection.cs:185)
5. UnityEngine.Debug:LogException(Exception)
6. Unity.Burst.Editor.BurstReflection:FindExecuteMethods(AssembliesType) (at Library/PackageCache/com.unity.burst@1.1.2/Editor/BurstReflection.cs:203)
7. Unity.Burst.Editor.BurstInspectorGUI:OnGUI() (at Library/PackageCache/com.unity.burst@1.1.2/Editor/BurstInspectorGUI.cs:187)
8. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
9.