Something strange occurs when exiting Rails application

[yivo]

See the logs:

Started POST "/funds/gen_address" for ::1 at 2017-12-12 12:57:16 +0200
Processing by Private::FundsController#gen_address as */*
  Member Load (0.3ms)  SELECT  `members`.* FROM `members` WHERE `members`.`disabled` = 0 AND `members`.`id` = 30  ORDER BY `members`.`id` ASC LIMIT 1
  Account Load (0.3ms)  SELECT `accounts`.* FROM `accounts` WHERE `accounts`.`member_id` = 30
  IdDocument Load (0.3ms)  SELECT  `id_documents`.* FROM `id_documents` WHERE `id_documents`.`member_id` = 30 LIMIT 1
  PaymentAddress Load (0.2ms)  SELECT `payment_addresses`.* FROM `payment_addresses` WHERE `payment_addresses`.`account_id` = 60
  PaymentAddress Load (0.3ms)  SELECT `payment_addresses`.* FROM `payment_addresses` WHERE `payment_addresses`.`account_id` = 61
  Rendered text template (0.0ms)
Completed 200 OK in 56ms (Views: 0.6ms | ActiveRecord: 1.5ms)
^C- Gracefully stopping, waiting for requests to finish
=== puma shutdown: 2017-12-12 12:58:08 ===
- Goodbye!
Exiting
Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]                                      # Path to the Ruby binary of your choice
                                                         # Default: /Users/yaroslav/.rbenv/versions/2.4.2/bin/ruby
  -m, [--template=TEMPLATE]                              # Path to some application template (can be a filesystem path or URL)
      [--skip-gemfile], [--no-skip-gemfile]              # Don't create a Gemfile
  -B, [--skip-bundle], [--no-skip-bundle]                # Don't run bundle install
  -G, [--skip-git], [--no-skip-git]                      # Skip .gitignore file
      [--skip-keeps], [--no-skip-keeps]                  # Skip source control .keep files
  -O, [--skip-active-record], [--no-skip-active-record]  # Skip Active Record files
  -S, [--skip-sprockets], [--no-skip-sprockets]          # Skip Sprockets files
      [--skip-spring], [--no-skip-spring]                # Don't install Spring application preloader
  -d, [--database=DATABASE]                              # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
                                                         # Default: sqlite3
  -j, [--javascript=JAVASCRIPT]                          # Preconfigure for selected JavaScript library
                                                         # Default: jquery
  -J, [--skip-javascript], [--no-skip-javascript]        # Skip JavaScript files
      [--dev], [--no-dev]                                # Setup the application with Gemfile pointing to your Rails checkout
      [--edge], [--no-edge]                              # Setup the application with Gemfile pointing to Rails repository
      [--skip-turbolinks], [--no-skip-turbolinks]        # Skip turbolinks gem
  -T, [--skip-test-unit], [--no-skip-test-unit]          # Skip Test::Unit files
      [--rc=RC]                                          # Path to file containing extra configuration options for rails command
      [--no-rc], [--no-no-rc]                            # Skip loading of extra configuration options from .railsrc file

Runtime options:
  -f, [--force]                    # Overwrite files that already exist
  -p, [--pretend], [--no-pretend]  # Run but do not make any changes
  -q, [--quiet], [--no-quiet]      # Suppress status output
  -s, [--skip], [--no-skip]        # Skip files that already exist

Rails options:
  -h, [--help], [--no-help]        # Show this help message and quit
  -v, [--version], [--no-version]  # Show Rails version number and quit

Description:
    The 'rails new' command creates a new Rails application with a default
    directory structure and configuration at the path you specify.

    You can specify extra command-line arguments to be used every time
    'rails new' runs in the .railsrc configuration file in your home directory.

    Note that the arguments specified in the .railsrc file don't affect the
    defaults values shown above in this help message.

Example:
    rails new ~/Code/Ruby/weblog

    This generates a skeletal Rails installation in ~/Code/Ruby/weblog.
    See the README in the newly created application to get going.
~/Development/my-peatio master $

To reproduce:

1. bundle exec rails s
2. Hit CTRL+C

[yivo]

@dkkoval We need your help with this since this started to occur after #65