code: def test_regression_issue_1220_get_face_chips():
      """
      Memory leak in Python get_face_chip
      https://github.com/davisking/dlib/issues/1220
      """
      face_chips = get_test_face_chips()
      count = sys.getrefcount(face_chips)
      assert count == 2
      count = sys.getrefcount(face_chips[0])
      assert count == 2
  
file_path: dlib/tools/python/test/test_numpy_returns.py
imports: import sys
  import pickle
  import dlib
  import pytest
  import utils
label_desc: Use image node_id 6 for calling a global function with example usage: test_regression_issue_1220_get_face_chips() without return types