bin/instrument_server in instrumental_tools-0.5.8 vs bin/instrument_server in instrumental_tools-0.6.0

@@ -226,9 +226,10 @@
       }
     end
 
     def self.swap
       _, total, used, free = `free -k -o | grep Swap`.chomp.split(/\s+/)
+      return {} if total.to_i == 0
       {
         'swap.used_mb' => used.to_f / 1024,
         'swap.free_mb' => free.to_f / 1024,
         'swap.free_percent' => (free.to_f / total.to_f) * 100,
       }