title: git failed in Qt creator
body: <p>I am using gitlab to manage my code.</p>
  
  <p>When I manage my code with git bash, it could commit and push the code to the server successfully. </p>
  
  <p>The code I use in the git bash like this:</p>
  
  <pre><code>git add .
  git commit
  git push -u origin master
  </code></pre>
  
  <p>However, when I commit the project in Qt creator, the author information do not fill automatically.</p>
  
  <p>(<a href="http://i.stack.imgur.com/BKpsQ.jpg" rel="nofollow"> click here for the capture image 1</a>)</p>
  
  <p>What's more, I click push in the git option in Qt creator. such as:</p>
  
  <p>(<a href="http://i.stack.imgur.com/Ubb0x.jpg" rel="nofollow">click here for the capture image 2</a>)</p>
  
  <p>it failed to send the code to the server, and here is the error message:</p>
  
  <pre><code>14:20 Executing in H:\0000ybzhao\Programming\00.git\pairSam2Bed: C:\Program Files\Git\bin\git.exe push
  warning: push.default is unset; its implicit value has changed in
  Git 2.0 from 'matching' to 'simple'. To squelch this message
  and maintain the traditional behavior, use:
  
    git config --global push.default matching
  
  To squelch this message and adopt the new behavior now, use:
  
    git config --global push.default simple
  
  When push.default is set to 'matching', git will push local branches
  to the remote branches that already exist with the same name.
  
  Since Git 2.0, Git defaults to the more conservative 'simple'
  behavior, which only pushes the current branch to the corresponding
  remote branch that 'git pull' uses to update the current branch.
  
  See 'git help config' and search for 'push.default' for further information.
  (the 'simple' mode was introduced in Git 1.7.11. Use the similar mode
  'current' instead of 'simple' if you sometimes use older versions of Git)
  
  Host key verification failed.
  fatal: Could not read from remote repository.
  
  Please make sure you have the correct access rights
  and the repository exists.
  The command "C:\Program Files\Git\bin\git.exe" terminated with exit code 128.
  </code></pre>
  
  <p>Is there anyone who knows why this happen or how to solve this problem?</p>
  
  <p>Thanks in advance.</p>