Unity people, do I bug report ExecutionEngineException: Attempting to JIT compile method?

Or do I just have to find an alternate solution because it's not something that can/will be fixed?

I've got this, coming from OrderBy I believe. Never occurred in 4.6.8 but has on very first run on 5.2.1.

ExecutionEngineException: Attempting to JIT compile method 'System.Linq.OrderedEnumerable`1<int>:GetEnumerator ()' while running with --aot-only.