(FunctionClauseError) no function clause matching in :lists.mapfoldl/3

[futpib]

Environment

• Elixir & Erlang/OTP versions (elixir --version): Elixir 1.9.1 (compiled with Erlang/OTP 22)
• Operating system: Arch Linux

Current behavior

Running this:

iex <<__EOF__
defmodule Foo do
  def bar() do
    super = 1
    super
  end
end
__EOF__

Gives an error that looks like something went wrong inside the compiler:

** (FunctionClauseError) no function clause matching in :lists.mapfoldl/3    
    
    The following arguments were given to :lists.mapfoldl/3:
    
        # 1
        #Function<4.86030924/2 in :elixir_erl_pass.translate_args/2>
    
        # 2
        {:elixir_erl, :match, nil, false, %{}, %{}, [], %{}, false}
    
        # 3
        nil
    
    (stdlib) lists.erl:1353: :lists.mapfoldl/3

This code does compile on an older Elixir 1.8.2 (compiled with Erlang/OTP 21) without errors:

docker run --rm -i elixir:1.8.2 iex <<__EOF__   
defmodule Foo do
  def bar() do
    super = 1
    super
  end
end
__EOF__

{:module, Foo,
 <<70, 79, 82, 49, 0, 0, 4, 16, 66, 69, 65, 77, 65, 116, 85, 56, 0, 0, 0, 121,
   0, 0, 0, 13, 10, 69, 108, 105, 120, 105, 114, 46, 70, 111, 111, 8, 95, 95,
   105, 110, 102, 111, 95, 95, 7, 99, 111, ...>>, {:bar, 0}}

Expected behavior

Either this code compiles without errors (as it does on an older Elixir 1.8.2) or a readable compilation error is raised.

[devonestes]

For a little more information, this appears to be an issue with super (probably in the compilation of overridable functions).

Erlang/OTP 21 [erts-10.3.4] [source] [64-bit] [smp:12:12] [ds:12:12:10] [async-threads:1] [hipe]

Interactive Elixir (1.9.0) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> defmodule Foo do
...(1)> def bar() do
...(1)> super = 1
...(1)> end
...(1)> end
warning: variable "super" is unused (if the variable is not meant to be used, prefix it with an underscore)
  iex:3: Foo.bar/0

** (FunctionClauseError) no function clause matching in :lists.mapfoldl/3

    The following arguments were given to :lists.mapfoldl/3:

        # 1
        #Function<4.91218841/2 in :elixir_erl_pass.translate_args/2>

        # 2
        {:elixir_erl, :match, nil, false, %{}, %{}, [], %{}, false}

        # 3
        nil

    (stdlib) lists.erl:1353: :lists.mapfoldl/3
iex(1)> defmodule Foo do
...(1)> def bar() do
...(1)> supe = 1
...(1)> end
...(1)> end
warning: variable "supe" is unused (if the variable is not meant to be used, prefix it with an underscore)
  iex:3: Foo.bar/0

{:module, Foo,
 <<70, 79, 82, 49, 0, 0, 4, 36, 66, 69, 65, 77, 65, 116, 85, 56, 0, 0, 0, 121,
   0, 0, 0, 13, 10, 69, 108, 105, 120, 105, 114, 46, 70, 111, 111, 8, 95, 95,
   105, 110, 102, 111, 95, 95, 7, 99, 111, ...>>, {:bar, 0}}