terminate called after throwing an instance of 'std::bad_alloc'

>> Looking for images in './data/test_data'
2018-04-16 15:11:21.166594: I tensorflow/core/platform/cpu_feature_guard.cc:137] Your CPU supports instructions that this TensorFlow binary was not compiled to use: SSE4.2
./captcha_train/captcha-62400
terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
Aborted