error output

gistfile1.txt

 NoMethodError       
  -------------       
  undefined method `[]' for nil:NilClass       
         
       
  Cookbook Trace:       
  ---------------       
           /tmp/kitchen/cache/cookbooks/bob/recipes/dns.rb:52:in `block in from_file'
       
           /tmp/kitchen/cache/cookbooks/bob/recipes/dns.rb:49:in `from_file'
       
    /tmp/kitchen/cache/cookbooks/bob/recipes/default.rb:34:in `from_file'       
         
       
  Relevant File Content:       
  ----------------------       
         /tmp/kitchen/cache/cookbooks/bob/recipes/dns.rb:
       
         
       
          45:  # grab the location of aws
       
          46:  aws = shell_out("/usr/bin/which aws").stdout.strip
       
          47:  
       
          48:  # tag our box in aws to match the dns name
       
          49:  execute "tag_instance" do
       
          50:    command lazy { "#{aws} ec2 create-tags --tags Key=Name,Value=#{record.gsub('.bob.com', '')} --resources #{node['ec2']['instance_id']} --region=us-east-1" }
       
          51:    only_if { node['ec2'] and node['ec2']['instance_id'] }
       
          52>>   not_if "#{aws} ec2 describe-tags  --region=us-east-1 --filters Name=resource-id,Values=#{node['ec2']['instance_id']} Name=key,Values=Name --output text|grep #{record.gsub('.bob.com', '')}" 
       
          53:  end
       
          54:  
       
   55: