title: Received Warning message "Path set to RVM" after updating ruby version using rvm
body: <p>Recently I tried to update my ruby version due to a warning message (see below).</p>
  
  <p>Now I get the following warning message when I start my iterm2:</p>
  
  <pre><code>Warning: PATH set to RVM ruby but GEM_HOME and/or GEM_PATH not set, see:
      https://github.com/wayneeseguin/rvm/issues/3212
  </code></pre>
  
  <p>Does anyone know how to <strong>resolve this warning?</strong> It hasn't really impacted my work but it is a little unsettling. </p>
  
  <p>for your information:<br>
   1. I believed I ran <code>rvm get stable</code> to get the latest ruby version.<br>
   2. this is the warning message I was initially trying to resolve but it has not been resolved either:</p>
  
  <pre><code>warning: parser/current is loading parser/ruby21, which recognizes
  warning: 2.1.5-compliant syntax, but you are running 2.1.2.
  </code></pre>
  
  <p>I am using 1. <code>Mac OS X</code> 2. <code>iterm2</code> and 3.<code>oh-my-zsh</code> shell </p>