CourierFormats return insufficiently informative error messages

[marcgrr]

For example,

record Example {
  foo: string
  bar: int
}

implicit val f  = CourierFormats.recordTemplateFormats[Example]
Json.parse("""{"foo": 1, "bar": 1}""").validate[Example]

outputs

JsError(List((,List(JsonValidationError(List(Unsupported JSON type: class play.api.libs.json.JsNumber),WrappedArray())))))

This does not contain the path where the problem happened. In complicated models, this makes it very hard to figure out the reason for the error.