title: Error Killed: 9 after command "git add ."
body: <p>I have a problem when I do "git add ." I received an error message "Killed: 9". If I try again "git add ." I received an another error:</p>
  
  <p>fatal: Unable to create './crmeasy/.git/index.lock': File exists.</p>
  
  <pre><code>Another git process seems to be running in this repository, 
  e.g. an editor opened by 'git commit'. Please make sure all 
  processes are terminated then try again. 
  If it still fails, a git process may have crashed in this 
  repository earlier: remove the file manually to continue.
  </code></pre>
  
  <p>If I delete ./.git/index.lock file and try again I receive the same cycle of errors.
  I try to commit new empty Django project virtualenv dir. How could I solve the issue?</p>