title: Unable to use po command in console (debug area)
body: <p>Suddenly I have started to get this message randomly ( but pretty much often)</p>
  
  <blockquote>
    <p>expression produced error: warning:
    /var/folders/53/0z4yfqt16tvbcn0z7f2385n80000gn/T/expr3-d271e2..swift:3:9:
    warning: initialization of variable '$__lldb_error_result' was never
    used; consider replacing with assignment to '_' or removing it
        var $__lldb_error_result = __lldb_tmp_error
        ~~~~^~~~~~~~~~~~~~~~~~~~
        _</p>
  </blockquote>
  
  <p>when I try to type something like this in console:</p>
  
  <pre><code>po myObject
  </code></pre>
  
  <p>So, the console prints only message above, rather than it gives me something useful... How to fix this, and what caused it?</p>