Deconstructing tuple from record inside record.

[robert-wallis]

type alias Model =
    { record : Record }

type alias Record =
    { x : Int
    , y : Int
    }

f : Model -> Int
f model =
    let
        ( x, y ) =
            model.record
    in
    x

https://ellie-app.com/gxDXjtJY6a1/0

Actual Error Message

When a record is nested in another record. And a tuple is deconstructed from the inner record. The following misleading error message is produced.

model does not have a field named record.

The type of model is:

    Main.Model

Which does not contain a field named record.

Hint: Problem in the record field. I always figure out field types in alphabetical order. If a field seems fine, I assume it is "correct" in subsequent checks. So the problem may actually be a weird interaction with previous fields.

It is misleading because the Model does contain a field named Record, however Record is not a tuple.

Expected Error Message

record is being used in an unexpected way.

Based on its definition, record has this type:

    Main.Model.Record

But you are trying to use it as a tuple:

    ( x, y )

This seems related to #250 except the actual error produced is different.