Do not resize while iterating

salt/cloud/clouds/joyent.py

@@ -690,10 +690,14 @@ def reformat_node(item=None, full=False):
             item[key] = None
 
     # remove all the extra key value pairs to provide a brief listing
+    to_del = []
     if not full:
         for key in six.iterkeys(item):  # iterate over a copy of the keys
             if key not in desired_keys:
-                del item[key]
+                to_del.append(key)
+
+    for key in to_del:
+        del item[key]
 
     if 'state' in item:
         item['state'] = joyent_node_state(item['state'])