Unclear error message on wrong expectation

[miniBill]

-- HTTP ERROR ---------------
BadBody: Unexpected combination, internal error

This is what happens when you get a non-json response but you expected a json one. The error message is less than maximally helpful.

[dillonkearns]

Thanks for the issue! Do you have the relevant code snippet that causes this?

[miniBill]

module ExpectingJson exposing (run)

import BackendTask exposing (BackendTask)
import BackendTask.Http as Http
import FatalError exposing (FatalError)
import Json.Decode
import Pages.Script as Script exposing (Script)


run : Script
run =
    Script.withoutCliOptions task


task : BackendTask FatalError ()
task =
    Http.getJson "http://www.viaggiatreno.it/viaggiatrenonew/resteasy/viaggiatreno/autocompletaStazione/LAT" Json.Decode.value
        |> BackendTask.allowFatal
        |> BackendTask.map (\_ -> ())