Quick Summary: Unexpected elm: Map.!: given key is not an element in the map
SSCCE
$ elm repl
---- Elm 0.19.1 ----------------------------------------------------------------
Say :help for help and :exit to exit! More at <https://elm-lang.org/0.19.1/repl>
--------------------------------------------------------------------------------
> type alias Goal a = { a | field : Int } -> a
>
> solution : Goal { field : Int }
| solution = identity
|
<function> : Goal { field : Int }
> puzzle : Goal { field : Int }
| puzzle rec = rec
|
elm: Map.!: given key is not an element in the map
CallStack (from HasCallStack):
error, called at libraries/containers/Data/Map/Internal.hs:610:17 in containers-0.5.11.0:Data.Map.Internal
Quick Summary: Unexpected elm: Map.!: given key is not an element in the map
SSCCE
Additional Details
I came across this while writing https://discourse.elm-lang.org/t/remove-1-record-field/7169/3