fix endless loop when expanding use

lib/elixir_sense/core/state.ex

@@ -1676,7 +1676,7 @@ defmodule ElixirSense.Core.State do
     {ast, state, env}
   end
 
-  def expand({:use, meta, _} = ast, state, env) do
+  def expand({:use, meta, [_ | _]} = ast, state, env) do
     alias ElixirSense.Core.MacroExpander
     line = Keyword.fetch!(meta, :line)
 

test/elixir_sense/core/metadata_builder_test.exs

@@ -7450,6 +7450,20 @@ defmodule ElixirSense.Core.MetadataBuilderTest do
     end
   end
 
+  test "no endless loop on use variable" do
+    state =
+      """
+      defmodule Some do
+        use
+        @spec my(number()) :: number()
+        def my(abc) do
+          abc + 1
+        end
+      end
+      """
+      |> string_to_state
+  end
+
   defp string_to_state(string) do
     string
     |> Code.string_to_quoted(columns: true, token_metadata: true)