Error upgrading from 1.0.7 -> 1.0.8: cannot preload associations in subquery in query about dataloader HOT 4 CLOSED

  def add_source(loader, session) do
    loader
    |> Dataloader.add_source(
      Accounts,
      Dataloader.Ecto.new(
        Repo,
        query: fn _query, params ->
          {_params_session, args} = Map.split(params, [:session])
          Accounts.query(args, session)
        end,
        default_params: %{session: session}
      )
    )
  end

  def user_profile(%User{id: user_id}, _args, %{context: %{loader: loader}}, fun \\ nil) do
    loader
    |> Dataloader.load(Accounts, {User, load: :profile}, user_id)
    |> on_load(fn loader ->
      loader
      |> Dataloader.get(Accounts, {User, load: :profile}, user_id)
      |> case do
        %User{} = user -> {:ok, user.profile}
        nil -> {:error, :not_found}
      end
      |> default_fun(fun)
    end)
  end

    from user in query,
      join: profile in assoc(user, :profile),
      preload: [profile: profile]

11:11:29.346 [error] Task #PID<0.3055.0> started from #PID<0.3058.0> terminating
** (Ecto.SubQueryError) the following exception happened when compiling a subquery.

    ** (Ecto.QueryError) cannot preload associations in subquery in query:

    from u0 in Server.Accounts.User,
      join: u1 in Server.Accounts.UserProfile,
      on: u1.user_id == u0.id,
      where: u0.id == parent_as(:input).id,
      limit: ^40,
      offset: ^0,
      preload: [profile: u1]


The subquery originated from the following query:

from u0 in subquery(from u0 in Server.Accounts.User,
  where: u0.id in ^["18dd4bf9-92ff-4448-9631-b6031355ce32"],
  distinct: true,
  select: [:id]),
  as: :input,
  join_lateral: u1 in subquery(from u0 in Server.Accounts.User,
  join: p1 in assoc(u0, :profile),
  where: u0.id == parent_as(:input).id,
  limit: ^40,
  offset: ^0,
  preload: [profile: p1]),
  on: true,
  select: u1