title: The fixity signature for ‘.++’ lacks an accompanying binding
body: <pre><code>infixr 5 .++
  </code></pre>
  
  <p>I do this in ghci and it gives the error message.</p>
  
  <pre><code>&lt;interactive&gt;:26:10: error:
      The fixity signature for ‘.++’ lacks an accompanying binding
  </code></pre>
  
  <p>How can I fix it? Thank you!</p>