Failed to parse warning when struct is to match a string. - Githubissues

jeremyjh / dialyxir

Mix tasks to simplify use of Dialyzer in Elixir projects.

Apache License 2.0

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Failed to parse warning when struct is to match a string. #450

Open eksperimental opened 2 years ago

eksperimental commented 2 years ago

Precheck

Take a look at the open issues and be sure that your issue is not already covered.
Be sure your versions of Dialyxir and Erlex are up to date.

Environment

Elixir & Erlang/OTP versions (elixir --version): Erlang/OTP 24 [erts-12.1.2] Elixir 1.13.1 (compiled with Erlang/OTP 24)
Which version of Dialyxir are you using? (cat mix.lock | grep dialyxir): 1.1.0

Current behavior

Please file a bug in https://github.com/jeremyjh/dialyxir/issues with this message.

Failed to parse warning:
[{:<, 1}, {:<, 1}, {:int, 1, 211228306992}, {:":", 1}, {:int, 1, 40}, {:>, 1}, {:>, 1}]

Legacy warning:
lib/beam_meta/util.ex:65: The pattern <<211228306992:40>> can never match the type #{'__struct__':='Elixir.Version', _=>_}

the simplified code is

  def to_version_requirement(%Version{} = version) do
    case version do
      "1.0.0" -> "1.0.0"
      _ -> "-0"
    end
  end

the offending lines is "1.0.0" -> "1.0.0" because version is a struct, so i can never match that string.