Elixir.Inspect.Algebra crash

elixir.inspect.erl

{function_clause,
                 [{'Elixir.Inspect.Algebra',format,
                      [infinity,0,
                       [{0,flat,
                         #{<<"blob_js_candidate">> => #{<<"esprima">> => #{<<"complexity_report">> => #{}},
                             <<"esvalidate">> => #{<<"jshint">> => #{},<<"jstodos">> => #{}}}}}]],
                      [{file,"lib/inspect/algebra.ex"},{line,432}]},
                  {'Elixir.Inspect.Algebra',pretty,2,
                      [{file,"lib/inspect/algebra.ex"},{line,405}]},
                  {'Elixir.Exception','-format_arity/1-lc$^0/1-0-',1,
                      [{file,"lib/exception.ex"},{line,357}]},
                  {'Elixir.Exception','-format_arity/1-lc$^0/1-0-',1,
                      [{file,"lib/exception.ex"},{line,357}]},
                  {'Elixir.Exception',format_arity,1,
                      [{file,"lib/exception.ex"},{line,357}]},
                  {'Elixir.Exception',format_mfa,3,
                      [{file,"lib/exception.ex"},{line,352}]},
                  {'Elixir.Exception',format_stacktrace_entry,1,
                      [{file,"lib/exception.ex"},{line,274}]},
                  {'Elixir.ExUnit.Formatter','-format_stacktrace/4-fun-0-',2,
                      [{file,"lib/ex_unit/formatter.ex"},{line,201}]}]}

stack.erl

=ERROR REPORT==== 19-May-2014::09:26:23 ===
** gen_event handler 'Elixir.ExUnit.CLIFormatter' crashed.
** Was installed in <0.76.0>
** Last event was: {test_finished,
                    {'Elixir.ExUnit.Test',
                     'test can generate complete set of tasks',
                     'Elixir.ProcessCommitTest',
                     {failed,
                      {error,
                       {'Elixir.UndefinedFunctionError','__exception__',
                        'Elixir.ProcessCommitTest',total_task,4},
                       [{'Elixir.ProcessCommitTest',total_task,
                         [[<<"foo/bar/baz">>],
                          #{'__struct__' => 'Elixir.Stack',
                            tree => #{#{name => <<"blob_js_candidate">>,version => <<"1">>} => #{#{input => #{language => <<"js_candidate">>,
                                    root => true,
                                    type => <<"blob">>},
                                  name => <<"esprima">>,
                                  output => #{type => <<"mozilla_esast">>},
                                  version => <<"1">>} => #{#{input => #{type => <<"mozilla_esast">>},
                                    name => <<"complexity_report">>,
                                    output => #{type => <<"meta">>},
                                    version => <<"1">>} => #{}},
                                #{input => #{language => <<"js_candidate">>,
                                    root => true,
                                    type => <<"blob">>},
                                  name => <<"esvalidate">>,
                                  output => #{language => <<"js">>,type => <<"blob">>},
                                  version => <<"1">>} => #{#{input => #{language => <<"js">>,type => <<"blob">>},
                                    name => <<"jshint">>,
                                    output => #{type => <<"meta">>},
                                    version => <<"1">>} => #{},
                                  #{input => #{language => <<"js">>,type => <<"blob">>},
                                    name => <<"jstodos">>,
                                    output => #{type => <<"meta">>},
                                    version => <<"1">>} => #{}}}}},
                          {'Elixir.HashSet',0,{[],[],[],[],[],[],[],[]}},
                          [#{input => #{language => <<"js">>,type => <<"blob">>},
                             name => <<"jshint">>,
                             output => #{type => <<"meta">>},
                             version => <<"1">>},
                           #{input => #{language => <<"js">>,type => <<"blob">>},
                             name => <<"jstodos">>,
                             output => #{type => <<"meta">>},
                             version => <<"1">>},
                           #{input => #{type => <<"mozilla_esast">>},
                             name => <<"complexity_report">>,
                             output => #{type => <<"meta">>},
                             version => <<"1">>}]],
                         []},
                        {'Elixir.ProcessCommitTest',
                         'test can generate complete set of tasks',1,
                         [{file,"test/process_commit_test.exs"},{line,9}]}]}},
                     11094,
                     [{test,'test can generate complete set of tasks'},
                      {line,4}]}}
** When handler state == {'Elixir.ExUnit.CLIFormatter.Config',0,0,0,0,false,
                             276932,true,272}
** Reason == {function_clause,
                 [{'Elixir.Inspect.Algebra',format,
                      [infinity,0,
                       [{0,flat,
                         #{<<"blob_js_candidate">> => #{<<"esprima">> => #{<<"complexity_report">> => #{}},
                             <<"esvalidate">> => #{<<"jshint">> => #{},<<"jstodos">> => #{}}}}}]],
                      [{file,"lib/inspect/algebra.ex"},{line,432}]},
                  {'Elixir.Inspect.Algebra',pretty,2,
                      [{file,"lib/inspect/algebra.ex"},{line,405}]},
                  {'Elixir.Exception','-format_arity/1-lc$^0/1-0-',1,
                      [{file,"lib/exception.ex"},{line,357}]},
                  {'Elixir.Exception','-format_arity/1-lc$^0/1-0-',1,
                      [{file,"lib/exception.ex"},{line,357}]},
                  {'Elixir.Exception',format_arity,1,
                      [{file,"lib/exception.ex"},{line,357}]},
                  {'Elixir.Exception',format_mfa,3,
                      [{file,"lib/exception.ex"},{line,352}]},
                  {'Elixir.Exception',format_stacktrace_entry,1,
                      [{file,"lib/exception.ex"},{line,274}]},
                  {'Elixir.ExUnit.Formatter','-format_stacktrace/4-fun-0-',2,
                      [{file,"lib/ex_unit/formatter.ex"},{line,201}]}]}