Coveralls errors out

[TrailingDots]

Updated to latest excoveralls:

    {:excoveralls, "~> 0.10", only: :test},

Now works like a charm. Sorry - I missed this! :(

============================ How do I close this bug report?

Coveralls crash

I have a newly installed erlang and elixir system downloaded from Erlang Solutions.

This is my new computer that runs Ubuntu 20.04.4 (Focal) 64-bit with Gnome 3.36.8.

The code under test and coverage has successfully run on my older computer (sadly dead).

Both _build and deps dirs were removed and 'mix deps.get run to install the latest dependencies.

The config dir is empty.

The coverall.json file contains:

    {
      "skip_files": [
        "test",
        "deps"
      ]
    }

The elixir and erlang versions:

    elixir --version
    Erlang/OTP 24 [erts-12.3] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [jit]

    Elixir 1.13.0 (compiled with Erlang/OTP 24)
    (base) cecilm@mercury 2 lil_schemer (master))

The mix.exs relevant to coverage:

  ...
      # Run: MIX_ENV=test mix coveralls.html
      # Then the html output is in cover/excoveralls.html
      test_coverage: [tool: ExCoveralls],
      preferred_cli_env: [
        coveralls: :test,
        "coveralls.detail": :test,
        "coveralls.post": :test,
        "coveralls.html": :test
      ]
    ...

  defp deps do
    [
      {:ex_doc, "~> 0.19"},
      {:httpoison, "~> 1.0.0"},
      {:earmark, "~> 1.2.4"},
      {:excoveralls, "~> 0.10", only: :test},
      {:credo, "~> 1.0", only: [:dev, :test], runtime: false},
      {:dialyxir, "~> 0.5", only: [:dev], runtime: false},
    ]
  end

When I attempt to get code coverage for code that compiles and successfully passes all tests the result crashes:

MIX_ENV=test mix coveralls
.......................................................

Finished in 0.3 seconds (0.00s async, 0.3s sync)
11 doctests, 44 tests, 0 failures

Randomized with seed 533597
** (FunctionClauseError) no function clause matching in IO.chardata_to_string/1    

    The following arguments were given to IO.chardata_to_string/1:

        # 1
        nil

    Attempted function clauses (showing 2 out of 2):

        def chardata_to_string(string) when is_binary(string)
        def chardata_to_string(list) when is_list(list)

    (elixir 1.13.0) lib/io.ex:627: IO.chardata_to_string/1
    (elixir 1.13.0) lib/path.ex:423: Path.dirname/1
    (excoveralls 0.12.3) lib/excoveralls/cover.ex:21: ExCoveralls.Cover.module_path/1
    (excoveralls 0.12.3) lib/excoveralls/stats.ex:54: ExCoveralls.Stats.add_counts/4
    (elixir 1.13.0) lib/enum.ex:2396: Enum."-reduce/3-lists^foldl/2-0-"/3
    (excoveralls 0.12.3) lib/excoveralls/stats.ex:28: ExCoveralls.Stats.report/1
    (excoveralls 0.12.3) lib/excoveralls.ex:43: ExCoveralls.execute/2
    (mix 1.13.0) lib/mix/tasks/test.ex:538: Mix.Tasks.Test.do_run/3
    (mix 1.13.0) lib/mix/task.ex:397: anonymous fn/3 in Mix.Task.run_task/3
    (excoveralls 0.12.3) lib/mix/tasks.ex:54: Mix.Tasks.Coveralls.do_run/2
    (mix 1.13.0) lib/mix/task.ex:397: anonymous fn/3 in Mix.Task.run_task/3
    (mix 1.13.0) lib/mix/cli.ex:84: Mix.CLI.run_task/2
    (elixir 1.13.0) lib/code.ex:1183: Code.require_file/2

[Uallessonivo]

this issue has already been resolved on #273

[RKushnir]

@parroty kindly, this issue could be closed, as mentioned by the OP.

[parroty]

Thank you for the follow-up. I'll be closing the issue.