Used toErrorType on a type that is not well-formed

[alexandru-calinoiu]

Quick Summary:

I tried the some code in the repl and go the following exception

elm: Used toErrorType on a type that is not well-formed
CallStack (from HasCallStack):
  error, called at compiler/src/Type/Type.hs:541:21 in main:Type.Type

SSCCE

Type the following code in your repl

> type alias Article a = { a | title : String, tags : List String }
> type Preview = Article { id : Int } 
> id : Article Preview -> Int
| id p =
|   p.id
|  

• Elm: 0.19.1
• Browser: none
• Operating System: pop os 19.04

Additional Details

None

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