check_credentials_permissions

# File lib/rubygems/config_file.rb, line 245
  def check_credentials_permissions
    return if Gem.win_platform? # windows doesn't write 0600 as 0600
    return unless File.exist? credentials_path

    existing_permissions = File.stat(credentials_path).mode & 0777

    return if existing_permissions == 0600

    alert_error Your gem push credentials file located at:\t#{credentials_path}has file permissions of 0#{existing_permissions.to_s 8} but 0600 is required.To fix this error run:\tchmod 0600 #{credentials_path}You should reset your credentials at:\thttps://rubygems.org/profile/editif you believe they were disclosed to a third party.

    terminate_interaction 1
  end