Nag does not support Yaml Merge <<

The merge key <<: does not seem to be supported with cfn nag It seems to fail for the following

ResourceName:
   Type: AWS::Service::ResourceType
   Properties:
      ...
      <<: *common_tags

Below is the error that is thrown

/usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/model/model_element.rb:101:in `instance_variable_get': `@<<=' is not allowed as an instance variable name (NameError)
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/model/model_element.rb:101:in `method_missing'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/parser/cfn_parser.rb:257:in `block in assign_fields_based_upon_properties'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/parser/cfn_parser.rb:255:in `each'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/parser/cfn_parser.rb:255:in `assign_fields_based_upon_properties'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/parser/cfn_parser.rb:173:in `block in transform_hash_into_model_elements_with_numbers'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/parser/cfn_parser.rb:165:in `each'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/parser/cfn_parser.rb:165:in `transform_hash_into_model_elements_with_numbers'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/parser/cfn_parser.rb:86:in `parse_without_parameters'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-model-0.6.6/lib/cfn-model/parser/cfn_parser.rb:43:in `parse'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-nag-0.8.10/lib/cfn-nag/cfn_nag.rb:87:in `audit'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-nag-0.8.10/lib/cfn-nag/cfn_nag.rb:68:in `block in audit_aggregate_across_files'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-nag-0.8.10/lib/cfn-nag/cfn_nag.rb:65:in `each'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-nag-0.8.10/lib/cfn-nag/cfn_nag.rb:65:in `audit_aggregate_across_files'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-nag-0.8.10/lib/cfn-nag/cfn_nag.rb:35:in `audit_aggregate_across_files_and_render_results'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-nag-0.8.10/lib/cfn-nag/cfn_nag_executor.rb:50:in `execute_aggregate_scan'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-nag-0.8.10/lib/cfn-nag/cfn_nag_executor.rb:30:in `scan'
    from /usr/local/Cellar/gem-cfn-nag/0.8.10/gems/cfn-nag-0.8.10/bin/cfn_nag_scan:11:in `<top (required)>'
    from /usr/local/bin/cfn_nag_scan:6:in `load'
    from /usr/local/bin/cfn_nag_scan:6:in `<main>'

stelligent / cfn_nag

Nag does not support Yaml Merge << #605