./src/index.re
Module build failed: Error: We've found a bug for you!
  /home/patev/repos/blog/src/postlist.re 33:17-21

  31 ┆    Array.map(((post) => <div key=(post##id)>
  32 ┆    (ReasonReact.stringToElement(post##title))</div>),
  33 ┆    parse##posts)
  34 ┆  )
  35 ┆ )

  This has type:
    (Js.Json.t) =>
    Js.t({. posts : array(Js.t({. body : string, id : string,
                                        title : string })) })
  But somewhere wanted:
    Js.t('a)    at <anonymous>