title: Error in `python': free(): invalid pointer: 0x00007fc3c90dc98e
body: <p>Got this error on an ubuntu server (100GB RAM) in anacondas py3.6 installation after it opened multiple files this way in a for loop (7 files * 4GB):</p>
  
  <blockquote>
    <p>temp_df = pd.read_csv(datafolder + str(file), encoding="ISO-8859-1", delimiter=';',low_memory=False)</p>
  </blockquote>
  
  <p>this is the error, it appeared after i set </p>
  
  <blockquote>
    <p>low_memory=False</p>
  </blockquote>
  
  <p>Doesnt happen when low_memory = True</p>
  
  <blockquote>
    <p><strong>* Error in `python': free(): invalid pointer: 0x00007fc3c90dc98e *</strong></p>
  </blockquote>
  
  <p>Anyone ideas? Thanks</p>