title: docker segmentation fault (core dumped), what to do in this situation?
body: <pre><code>root@ramcharran-VirtualBox:/home/ramcharran/src# docker run -it dll_img /bin/bash
  bash-4.3# python3 app.py
  connection to cursor
  registering tokenizer
  virtual table created
  inserted data into virtual table
  Segmentation fault (core dumped)
  bash-4.3#
  </code></pre>
  
  <p>I have tried increasing the core limit with <strong>ulimit -c unlimited</strong> that did not work.</p>
  
  <p>I have successfully executed the code locally but with docker i seem to get a segmentation fault which i do not understand.</p>
  
  <p>I tried to increase the basedevice storage that didnt work.
  my docker machine for some reason does not have a basedevice storage.</p>
  
  <pre><code>root@ramcharran-VirtualBox:/home/ramcharran# docker info
  Containers: 6
   Running: 0
   Paused: 0
   Stopped: 6
  Images: 19
  Server Version: 1.12.3
  **Storage Driver: aufs
   Root Dir: /var/lib/docker/aufs
  Backing Filesystem: extfs
  Dirs: 27**
  Dirperm1 Supported: true
  Logging Driver: json-file
  Cgroup Driver: cgroupfs
  Plugins:
  Volume: local
  Network: bridge host null overlay
  Swarm: inactive
  Runtimes: runc
  Default Runtime: runc
  Security Options: apparmor seccomp
  Kernel Version: 4.4.0-59-generic
  Operating System: Ubuntu 16.04.1 LTS
  OSType: linux
  Architecture: x86_64
  CPUs: 4
  Total Memory: 8.046 GiB
  Name: ramcharran-VirtualBox
  ID: WRT4:KUPK:BFBA:EJ5G:XWT2:7FXX:UX42:NALM:FNNJ:Z4XV:X44U:NFOT
  Docker Root Dir: /var/lib/docker
  Debug Mode (client): false
  Debug Mode (server): false
  Registry: https://index.docker.io/v1/
  WARNING: No swap limit support
  Insecure Registries:
   127.0.0.0/8
  root@ramcharran-VirtualBox:/home/ramcharran#
  </code></pre>
  
  <p><strong><em>EDIT</em></strong></p>
  
  <p>The following is my source code:</p>
  
  <pre><code>import json
  
  import apsw
  import sqlitefts as fts
  
  import search
  from search import OUWordTokenizer
  
  from flask import Flask
  app = Flask(__name__)
  
  #tracker = SummaryTracker()
  def tokenize():
      connection = apsw.Connection('texts.db', flags=apsw.SQLITE_OPEN_READWRITE)
      c = connection.cursor()
      print("connection to cursor")
      fts.register_tokenizer(c, 'oulatin', fts.make_tokenizer_module(OUWordTokenizer('latin')))
      print("registering tokenizer")
      c.execute("begin;")
      c.execute("CREATE VIRTUAL TABLE IF NOT EXISTS text_idx  USING fts3 (id, title, book, author, date, chapter, verse, passage, link, documentType, tokenize={});".format("oulatin"))
      c.execute("commit;")
      print("virtual table created")
      c.execute("INSERT INTO text_idx (id, title, book, author, date, chapter, verse, passage, link, documentType) SELECT id, title, book, author, date, chapter, verse, passage, link, documentType FROM texts;")
      print ("inserted data into virtual table")
  
  @app.route('/')
  def hello_world():
      print ("Hello world")
      search.word_tokenizer
      print ("word_tokenizers")
      return json.dumps({"name": "test"})
  
  
  if __name__ == '__main__':
      tokenize()
      app.run(debug=True, host='0.0.0.0')
   #tracker.print_diff()
  </code></pre>
  
  <p>OUTokenizer has no problems, i have debugged it with gdb, valgrind and also using a print after each statement and all of them were executed without errors. The segmentation fault occurs once the data is inserted into the table which comes after the OUtokenizer has been executed.</p>
  
  <p>Please help me solve this problem.</p>