SSCCE for "I ran into something that bypassed the normal error reporting process" error in 0.19.1-alpha

elm.json

{
    "type": "application",
    "source-directories": [
        "src",
        "src-gen"
    ],
    "elm-version": "0.19.1",
    "dependencies": {
        "direct": {
            "elm/browser": "1.0.1",
            "elm/core": "1.0.2",
            "elm/html": "1.0.0"
        },
        "indirect": {
            "elm/json": "1.1.3",
            "elm/time": "1.0.0",
            "elm/url": "1.0.0",
            "elm/virtual-dom": "1.0.2"
        }
    },
    "test-dependencies": {
        "direct": {},
        "indirect": {}
    }
}

src-gen__Main.elm

-- src-gen/Main.elm

module Main exposing (main)

import Browser
import Html exposing (Html, button, div, text)

main =
  Browser.sandbox { init = 0, update = update, view = view }

update msg model =
    model

view = always <| text "foo"

src__Main.elm

-- src/Main.elm

module Main exposing (main)

import Browser
import Html exposing (Html, button, div, text)

main =
  Browser.sandbox { init = 0, update = update, view = view }

update msg model =
    model

view = always <| text "foo"