JSON: Provided type for consistent, mixed-type, nested arrays is wrong

[CaringDev]

With FSharp.Data 3.3.3 (latest as of 31.12.2020) the following phenomenon can be observed:

#r "nuget: FSharp.Data,3.3.3"

open FSharp.Data

type PT = JsonProvider<"""{"k": [["foo", 1], ["bar", 2]] }""">

// expected: JsonProvider<...>.IntOrString [] []
// actual: JsonProvider<...>.IntOrString []
let sample = PT.GetSample().K

// string * int
let failsAtRuntime =
    match sample with
    | [| n; v |] -> n.String, v.Number // System.Exception: Expecting an array with single element at '/k[0]', got ["foo",1]
    | _ -> failwith "Unexpected structure"

// (string * int) []
let ok =
    sample
    |> Array.map (fun k ->
        match k.JsonValue.AsArray() with
        | [| n; v |] -> n.AsString(), v.AsInteger()
        | _ -> failwith "Unexpected structure")

type PT = JsonProvider<"""{"k": [["foo", "bar"], ["other", "stuff"]] }"""> does not suffer from the same problem.

I'm willing to try and fix this myself, will get around to do this at earliest mid-October tough. Totally slipped my mind... hope to have another look soonish 😅