Error when Module Attribute in Docstring

[aj-foster]

Hello there 👋🏼

When a module attribute is used in a docstring, elixir_sense appears to raise an error while building metadata for function definitions. A reduced test case is available here. Anecdotally, this issue affects an entire project when any function utilizes module attributes in this way.

• Elixir 1.16.0
• ElixirLS 0.20.0
• VS Code 1.87.0
• elixir_sense 2.0.0

diff --git a/lib/test.ex b/lib/test.ex
index d0c8c5b..61f44c5 100644
--- a/lib/test.ex
+++ b/lib/test.ex
@@ -1,10 +1,12 @@
 defmodule Test do
+  @some_attribute 42
+
   @moduledoc """
   Documentation for `Test`.
   """
 
   @doc """
-  Hello world.
+  Hello world. #{@some_attribute}
 
   ## Examples
 

The error:

[Warn  - 6:20:06 PM] ** (ErlangError) Erlang error: "Protocol.UndefinedError during metadata build pre:\nprotocol String.Chars not implemented for {%ArgumentError{message: \"cannot invoke @/1 outside module\"}, [{Kernel, :assert_module_scope, 3, [file: ~c\"lib/kernel.ex\", line: 6555]}, {Kernel, :@, 1, [file: ~c\"expanding macro\"]}, {:elixir_compiler_0, :__FILE__, 1, [file: ~c\"nofile\", line: 9]}, {Kernel, :to_string, 1, [file: ~c\"expanding macro\"]}, {:elixir_compiler_0, :__FILE__, 1, [file: ~c\"nofile\", line: 9]}]} of type Tuple\nast node: {:def, [do: [line: 17, column: 13], end: [line: 19, column: 3], line: 17, column: 3], [{:hello, [line: 17, column: 7], nil}, [do: :world]]}"
    (elixir 1.16.0) lib/string/chars.ex:3: String.Chars.impl_for!/1
    (elixir 1.16.0) lib/string/chars.ex:22: String.Chars.to_string/1
    (elixir_sense 2.0.0) lib/elixir_sense/core/state.ex:1547: ElixirSense.Core.State.format_doc_arg/1
    (elixir_sense 2.0.0) lib/elixir_sense/core/state.ex:1504: anonymous fn/2 in ElixirSense.Core.State.reduce_doc_context/1
    (elixir 1.16.0) lib/enum.ex:2528: Enum."-reduce/3-lists^foldl/2-0-"/3
    (elixir_sense 2.0.0) lib/elixir_sense/core/state.ex:1492: ElixirSense.Core.State.consume_doc_context/1
    (elixir_sense 2.0.0) lib/elixir_sense/core/state.ex:842: ElixirSense.Core.State.add_func_to_index/7
    (elixir_sense 2.0.0) lib/elixir_sense/core/metadata_builder.ex:309: ElixirSense.Core.MetadataBuilder.pre_func/6
    (elixir_sense 2.0.0) lib/elixir_sense/core/metadata_builder.ex:102: ElixirSense.Core.MetadataBuilder.safe_call_pre/2
    (elixir 1.16.0) lib/macro.ex:637: anonymous fn/4 in Macro.do_traverse_args/4
    (stdlib 3.17.1) lists.erl:1358: :lists.mapfoldl/3
    (stdlib 3.17.1) lists.erl:1359: :lists.mapfoldl/3
    (elixir 1.16.0) lib/macro.ex:602: Macro.do_traverse/4
    (elixir 1.16.0) lib/macro.ex:617: Macro.do_traverse/4
    (stdlib 3.17.1) lists.erl:1358: :lists.mapfoldl/3
    (elixir 1.16.0) lib/macro.ex:622: Macro.do_traverse/4