Packed rules: [["read","Post",{"__proto__.__polluted_test_6__":"test6"}]]
  Unpacked rules: [{"inverted":false,"action":["read"],"subject":["Post"],"conditions":{"__proto__.__polluted_test_6__":"test6"}}]
  Before: undefined
  After: undefined
  [PASS] Variant 6: No pollution via pack/unpack