title: os.GetEnv() dosen't work after set env variable
body: <p>I have the case dosen't work function </p>
  
  <blockquote>
    <p>os.GetEnv()</p>
  </blockquote>
  
  <p>I have set a variable in my system ADDR="192.168.1.100" trought file <strong>.bashrc</strong> and <strong>.profile</strong>. So if I open terminal and type below command, I get good result</p>
  
  <blockquote>
    <p>$ echo $ADDR</p>
    
    <p>192.168.1.100</p>
  </blockquote>
  
  <p>Why in below very simply program I get Error if variable is correct set in system ?</p>
  
  <pre><code>func main(){
      addr := os.Getenv("ADDR")
      if addr == "" {
          return errors.New("missing addres")
      }
  }
  </code></pre>
  
  <p>I also restarted IDE a many times. Tried write in terminal again </p>
  
  <blockquote>
    <p>$ env ADDR="192.168.1.100"</p>
  </blockquote>
  
  <p>but still this same effect.</p>