Server reports AttributeError if definition is not valid YAML

[advornic]

DEBUG: NeighborDB: Match for pattern leaf pattern succeeded                                        
DEBUG: while parsing a block mapping                                                               
  in "", line 2, column 1:                                                                 
    name: leaf definition                                                                          
    ^                                                                                              
expected , but found ''                                           
  in "", line 11, column 2:                                                                
     - name: configure vlan 1                                                                      
     ^                                                                                             
ERROR: 'NoneType' object has no attribute 'get'                                                    
Traceback (most recent call last):                                                                 
  File "build/bdist.linux-x86_64/egg/ztpserver/wsgiapp.py", line 89, in __call__                   
    result = method(request, **request.urlvars)                                                    
  File "build/bdist.linux-x86_64/egg/ztpserver/controller.py", line 141, in create                 
    return self.fsm('required_attributes', request=request, node=node)                             
  File "build/bdist.linux-x86_64/egg/ztpserver/controller.py", line 158, in fsm                    
    (response, next_state) = method(response, **kwargs)                                            
  File "build/bdist.linux-x86_64/egg/ztpserver/controller.py", line 227, in post_node              
    data = ndb.create_node_definition(definition, node)                                            
  File "build/bdist.linux-x86_64/egg/ztpserver/neighbordb.py", line 141, in create_node_definition 
    url = definition.get('definition')                                                             
AttributeError: 'NoneType' object has no attribute 'get'                                           
192.168.0.21 - - [24/Apr/2014 03:50:07] "POST /nodes HTTP/1.1" 500 228                             
 

Would be great to be a bit more explicit about what the problem is in the logs.

Here is the erroneous definition:

--- 
actions: 
  - 
    action: add_config
    attributes: 
      url: "http://192.168.1.220:8787/files/templates/system.template"
    name: "configure system"
  - 
# indentation inconsistent between the two sections
   action: add_config
   attributes: 
     url: "http://192.168.1.220:8787/files/templates/leaf.template"
     variables: 
       ipaddress: allocate('leaf_spine_ip')
       man_ipaddress: allocate('leaf_man_ip')
   name: "configure vlan 1"
name: "leaf definition"