Error when attempting rename

[randycoulman]

Thanks so much for this long-awaited tool! I'm going to open a few issues based on my early usage of RefactorEx, but please know that I'm extremely grateful for all of your work on this so far!

In this file from one of my open-source projects, I attempted to rename the args parameter to run on line 15.

When I hit the F2 key to start the rename, I received the error below in the RefactorEx output window in VSCode. I was still prompted for a new name, but when I entered the new name, only the two occurrences on line 15 were updated. The occurrence on line 16 was not renamed.

** (ArgumentError) errors were found at the given arguments:

  * 1st argument: not a list

    :erlang.length(nil)
    (refactorex 0.1.0) lib/refactorex/refactor/function.ex:36: Refactorex.Refactor.Function.find_definitions/1
    (refactorex 0.1.0) lib/refactorex/refactor/function/rename_function.ex:20: Refactorex.Refactor.Function.RenameFunction.can_refactor?/2
    (refactorex 0.1.0) lib/refactorex/refactor/function/rename_function.ex:2: Refactorex.Refactor.Function.RenameFunction.visit/4
    (sourceror 1.0.2) lib/sourceror/zipper.ex:452: Sourceror.Zipper.do_traverse_while/3
    (refactorex 0.1.0) lib/refactorex/refactor/function/rename_function.ex:2: Refactorex.Refactor.Function.RenameFunction.available?/2
    (refactorex 0.1.0) lib/refactorex/refactor.ex:112: anonymous fn/3 in Refactorex.Refactor.available_refactorings/3
    (elixir 1.17.2) lib/task/supervised.ex:101: Task.Supervised.invoke_mfa/2