Describe hangs

Author: pavpanchekha

www/doc/1.5/faq.html

@@ -25,6 +25,14 @@ <h2>Common errors</h2>
     information and debugging tips.
   </p>
 
+  <h3 id="hangs">Herbie hangs forever</h3>
+
+  <p>
+    Herbie 1.5 on Racket 8.0 through 8.2 sometimes hangs due to a bugs
+    in both Herbie and Racket. Please reinstall Herbie 1.5; we
+    re-released it with a fix for this bug.
+  </p>
+
   <h3 id="invalid-syntax">Invalid syntax</h3>
 
   <p>