title: Segmentation fault (core dump) when extract features in caffe?
body: <p>When I follow the tutorial about feature extraction using a pre-trained model with caffe, I met some problem.
   As the tutorial says, I have made the temp.txt to generate a list of the files to process. To add expects labels after each filenames I have also made the file_list.txt. Then I used imagenet_mean.binaryproto and imagenet_val.prototxt to define the feature extraction network architecture. After this, I input the command in the terminal like this "./build/tools/extract_features.bin models/bvlc_reference_caffenet/bvlc_reference_caffenet.caffemodel examples/_temp/imagenet_val.prototxt fc7 examples/_temp/features 10 leveldb". 
  The expected result is just like the following image shown<a href="http://i.stack.imgur.com/eqWT2.png" rel="nofollow">enter image description here</a>
  While I met the problem just like this<a href="http://i.stack.imgur.com/Vot60.png" rel="nofollow">enter image description here</a>
  I have found all the necessary files mentioned in the tutorial. I really can not figure out the problem hoping someone will help me. I will be so appreciate! English is not my mother tongue, I hope readers can be more patient.</p>