title: undefined local variable or method `byebug'
body: <p>I have the follwing error:</p>
  
  <blockquote>
    <p>NameError (undefined local variable or method `byebug'</p>
  </blockquote>
  
  <p>Code is</p>
  
  <pre><code>def  test
    t = ""
    byebug
  end
  </code></pre>
  
  <p>--</p>
  
  <blockquote>
    <p>RAILS_ENV=development gem list | grep bye</p>
    
    <p>byebug (3.5.1)</p>
  </blockquote>
  
  <p>then I run :</p>
  
  <blockquote>
    <p>RAILS_ENV=development rails s</p>
  </blockquote>
  
  <p>but it shows:</p>
  
  <blockquote>
    <p>NameError (undefined local variable or method `byebug'</p>
  </blockquote>
  
  <p>Do you have any idea why?</p>
  
  <p>Thanks!</p>