Regression w/ multiple sorts

[frankdugan3]

Describe the bug
There seems to be a regression in sorting, where sorting on multiple columns crashes the query engine. It still does it even when sorting on multiple "normal" attributes and not loading any aggs/calcs. Seems to be a problem w/ any multiple-sorts.

All Ash libs are at the lastest as of this post:

* ash 1.46.13 (Hex package) (mix)
  locked at 1.46.13 (ash) 776a44f1
  ok
* ash_graphql 0.16.21 (Hex package) (mix)
  locked at 0.16.21 (ash_graphql) 23ef9737
  ok
* ash_phoenix 0.5.5 (Hex package) (mix)
  locked at 0.5.5 (ash_phoenix) 4a43ac09
  ok
* ash_policy_authorizer 0.16.2 (Hex package) (mix)
  locked at 0.16.2 (ash_policy_authorizer) 508a0c17
  ok
* ash_postgres 0.40.8 (Hex package) (mix)
  locked at 0.40.8 (ash_postgres) 91a832bb
  ok

Additional context
Here is the error output (the query is also paginated):

iex(4)> {:EXIT, #PID<0.1169.0>, :normal}
#Ash.Query<
  resource: Hsm.Attendance.Record,
  sort: [in: :asc, out: :asc],
  select: [:out, :in, :duration_hours, :notes]
>
[error] Task #PID<0.1172.0> started from #PID<0.1144.0> terminating
** (FunctionClauseError) no function clause matching in :lists.mapfoldl/3
    (stdlib 3.15.1) lists.erl:1357: :lists.mapfoldl(#Function<7.20389857/2 in Macro.do_traverse_args/4>, :ok, {:asc, {{:., [], [{:&, [], [0]}, :out]}, [], []}})
    (stdlib 3.15.1) lists.erl:1359: :lists.mapfoldl/3
    (elixir 1.12.2) lib/macro.ex:468: Macro.do_traverse/4
    (stdlib 3.15.1) lists.erl:1358: :lists.mapfoldl/3
    (elixir 1.12.2) lib/macro.ex:468: Macro.do_traverse/4
    (elixir 1.12.2) lib/macro.ex:463: Macro.do_traverse/4
    (stdlib 3.15.1) lists.erl:1358: :lists.mapfoldl/3
    (elixir 1.12.2) lib/macro.ex:468: Macro.do_traverse/4
    (ecto 3.6.2) lib/ecto/query/inspect.ex:230: Inspect.Ecto.Query.expr/3
    (ecto 3.6.2) lib/ecto/query/inspect.ex:195: Inspect.Ecto.Query.window/2
    (elixir 1.12.2) lib/enum.ex:1582: Enum."-map/2-lists^map/1-0-"/2
    (ecto 3.6.2) lib/ecto/query/inspect.ex:96: Inspect.Ecto.Query.to_list/1
    (ecto 3.6.2) lib/ecto/query/inspect.ex:75: Inspect.Ecto.Query.to_string/1
    (ecto 3.6.2) lib/ecto/query/inspect.ex:138: Inspect.Ecto.Query.inspect_source/1
    (ecto 3.6.2) lib/ecto/query/inspect.ex:134: Inspect.Ecto.Query.bound_from/2
    (ecto 3.6.2) lib/ecto/query/inspect.ex:92: Inspect.Ecto.Query.to_list/1
    (ecto 3.6.2) lib/ecto/query/inspect.ex:75: Inspect.Ecto.Query.to_string/1
    (ecto 3.6.2) lib/ecto/exceptions.ex:77: Ecto.SubQueryError.exception/1
Function: #Function<14.23005548/0 in Ash.Actions.Read.fetch_count/7>
    Args: []
[error] GenServer #PID<0.1144.0> terminating
** (FunctionClauseError) no function clause matching in Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (elixir 1.12.2) lib/enum.ex:1704: Enum."-map_reduce/3-lists^mapfoldl/2-0-"(#Function<24.10667392/2 in Ecto.Query.Planner.prewalk/6>, 0, {:asc, {{:., [], [{:&, [], [0]}, :out]}, [], []}})
    (elixir 1.12.2) lib/enum.ex:1704: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (elixir 1.12.2) lib/enum.ex:1704: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (elixir 1.12.2) lib/enum.ex:1704: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (elixir 1.12.2) lib/enum.ex:2385: Enum."-reduce/3-lists^foldl/2-0-"/3
    (elixir 1.12.2) lib/enum.ex:2385: Enum."-reduce/3-lists^foldl/2-0-"/3
    (ecto 3.6.2) lib/ecto/repo/queryable.ex:208: Ecto.Repo.Queryable.execute/4
    (ecto 3.6.2) lib/ecto/repo/queryable.ex:19: Ecto.Repo.Queryable.all/3
    (ash_postgres 0.40.8) lib/data_layer.ex:435: AshPostgres.DataLayer.run_query/2
    (ash 1.46.13) lib/ash/actions/read.ex:780: Ash.Actions.Read.run_query/2
    (ash 1.46.13) lib/ash/actions/read.ex:482: anonymous fn/5 in Ash.Actions.Read.data_field/4

[zachdaniel]

Resolved in latest ash_postgres release :D Thanks for the report!