Explanation: You can only access fields on records, like this:


    ┌─────────────────────────────────┐
    │ { foo = True, bar = "ABC" }.foo │  This is valid ...
    └─────────────────────────────────┘


    ┌───────────────────────────────────────────┐
    │ λ(r : { foo : Bool, bar : Text }) → r.foo │  ... and so is this
    └───────────────────────────────────────────┘


... but you can only access fields if they are present

For example, the following expression is $_NOT valid:

    ┌─────────────────────────────────┐
    │ { foo = True, bar = "ABC" }.qux │
    └─────────────────────────────────┘
                                  ⇧
                                  Invalid: the record has no ❰qux❱ field

You tried to access a field named:

↳ $txt0

... but the field is missing because the record only defines the following fields:

↳ $txt1