Failing tests on mix

gistfile1.txt

==> mix (exunit)
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  1) test prints list of dependencies and their lock status (Mix.Tasks.DepsTest)
     ** (MatchError) no match of right hand side value: [""]
     stacktrace:
       lib/mix/scm/git.ex:132: Mix.SCM.Git.get_rev_info/0
       lib/mix/scm/git.ex:32: Mix.SCM.Git."-lock_status/1-fun-0-"/4
       /home/janjiss/elixir/lib/elixir/lib/file.ex:913: File.cd!/2
       lib/mix/deps.ex:273: Mix.Deps.check_lock/2
       lib/mix/tasks/deps.ex:24: Mix.Tasks.Deps."-run/1-fun-0-"/3
       /home/janjiss/elixir/lib/elixir/lib/enum.ex:517: Enum."-each/2-lists^foreach/1-0-"/2
       /home/janjiss/elixir/lib/elixir/lib/enum.ex:517: Enum.each/2
       test/mix/tasks/deps_test.exs:118: Mix.Tasks.DepsTest."-test prints list of dependencies and their lock status/1-fun-0-"/0