)]}'
{
  "commit": "89312fbebfdab4c4ab977063782237cd8369a8c7",
  "tree": "7a238467e05767608d9d7a122f65a10011092e71",
  "parents": [
    "5831c6957d29e8fda0383bfe337533444c5155c8"
  ],
  "author": {
    "name": "Francois-Rene Rideau",
    "email": "tunes@google.com",
    "time": "Thu Sep 10 18:53:03 2015 +0000"
  },
  "committer": {
    "name": "Damien Martin-Guillerez",
    "email": "dmarting@google.com",
    "time": "Fri Sep 11 09:45:33 2015 +0000"
  },
  "message": "Refactor Skylark Environment-s\n\nMake Environment-s freezable: Introduce a class Mutability\nas a revokable capability to mutate objects in an Environment.\nFor now, only Environment-s carry this capability.\nMake sure that every Mutability is revoked in the same function that create...\n\nThis reinstates a change that previously rolled-back because it broke the\nserializability of SkylarkLookupValue. Bad news: serializing it succeeds for the\nwrong reason, because a SkylarkEnvironment was stored as a result (now an\nEnvironment.Extension) that was Serializable but inherited its bindings from an Environment (now an Environment.BaseExtension) which wasn\u0027t Serializable.\nApparently, Java doesn\u0027t try to serialize the bindings then (or at least doesn\u0027t\nerror out when it fails), because these bindings map variable names to pretty\narbitrary objects, and a lot of those we find in practice aren\u0027t Serializable.\nThus the current code passes the same tests as the previous code, but obviously\nthe serialization is just as ineffective as it used to be.\n\n--\nMOS_MIGRATED_REVID\u003d102776694\n",
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