title: _pickle.UnpicklingError: pickle data was truncated
body: <p>l'm using python3.6/  .  l pickled my file using <code>protocol=pickle.HIGHEST_PROTOCOL</code></p>
  
  <p>when l load it as follow :</p>
  
  <pre><code>with open('data.sav', 'rb') as handle:
        data = pickle.load(handle)
  </code></pre>
  
  <p>l get the following error :  </p>
  
  <pre><code>  File "&lt;stdin&gt;", line 2, in &lt;module&gt;
  _pickle.UnpicklingError: pickle data was truncated
  </code></pre>
  
  <p>What is wrong ?</p>