gistfile1.txt

17:19:48.654 [error] GenEvent handler Logger.ErrorHandler installed at :error_logger
** (exit) an exception was raised:
    ** (FunctionClauseError) no function clause matching in Exception.format_arity/1
        (elixir) lib/exception.ex:431: Exception.format_arity(:undefined)
        (elixir) lib/exception.ex:427: Exception.format_mfa/3
        (logger) lib/logger/translator.ex:165: Logger.Translator.child_info/2
        (logger) lib/logger/translator.ex:90: Logger.Translator.translate_supervisor/2
        (logger) lib/logger/error_handler.ex:116: Logger.ErrorHandler.translate/6
        (logger) lib/logger/error_handler.ex:62: Logger.ErrorHandler.log_event/5
        (logger) lib/logger/error_handler.ex:27: Logger.ErrorHandler.handle_event/2
        (stdlib) gen_event.erl:525: :gen_event.server_update/4