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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_hd104idgj2okdr1npjumchols5, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
// iterate safely (& quickly) in the face of concurrent modifications
static <A> IterableIterator<A> concurrentlyIterateSet(final NavigableSet<A> set) {
  fO mutex = collectionMutex(set);
  ret iteratorFromFunction(new F0<A>() {
    Iterator<A> it = set.iterator();
    A key;
    
    A get() {
      synchronized(mutex) {
        try {
          if (!it.hasNext()) null;
          ret key = it.next();
        } catch (ConcurrentModificationException e) {
          print("Re-iterating");
          it = set.tailSet(key, false).iterator();
          if (!it.hasNext()) null;
          ret key = it.next(); // Can't throw another exception
        }
      }
    }
  });
}