title: ruby on rails - git push heroku master stop on "remote: Building source: "
body: <p>On "git push heroku master" the deploy stop on "remote: Building source" according image bellow.</p>
  
  <p>Any body can help me?</p>
  
  <p><a href="https://i.stack.imgur.com/J9j0J.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/J9j0J.jpg" alt="enter image description here"></a></p>
  
  <p>My gem file:</p>
  
  <pre class="lang-rb prettyprint-override"><code>source 'https://rubygems.org'
  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
  
  ruby '2.5.7'
  
  gem "font-awesome-rails"
  
  gem "nested_form"
  
  # To paginate
  gem 'will_paginate', '~&gt; 3.1.0'
  
  # Jquery
  gem 'jquery-rails'
  
  # Autenticate user
  gem 'devise'
  
  #gem to mask the inputs
  gem 'jquery_mask_rails', '~&gt; 0.1.0'
  
  # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
  gem 'rails', '~&gt; 5.2.3'
  # Use sqlite3 as the database for Active Record
  group :development, :test do
    gem 'sqlite3', '~&gt; 1.4.1'
  end
  group :production do
    gem 'pg'
  end
  
  # Reduces boot times through caching; required in config/boot.rb
  gem 'bootsnap', '&gt;= 1.1.0', require: false
  
  group :development, :test do
    # Call 'byebug' anywhere in the code to stop execution and get a debugger console
    gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  end
  
  group :development do
    # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
    gem 'web-console', '&gt;= 3.3.0'
    gem 'listen', '&gt;= 3.0.5', '&lt; 3.2'
    # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
    gem 'spring'
    gem 'spring-watcher-listen', '~&gt; 2.0.0'
  end
  
  group :test do
    # Adds support for Capybara system testing and selenium driver
    gem 'capybara', '&gt;= 2.15'
    gem 'selenium-webdriver'
    # Easy installation and use of chromedriver to run system tests with Chrome
    gem 'chromedriver-helper'
  end
  
   gem 'wdm', '&gt;= 0.1.0'
  
  
  ruby '2.5.7'
  
  </code></pre>
  
  <p>In the previous deploy I used a version of ruby and rails different from the version in which I am trying to deploy. Does this have anything to do with the problem?</p>