message: Upgrade gast dependency to 0.2.2. The existing version, 0.2.0, does not parse annotated assignment nodes correctly.
diff: @@ -330,12 +330,12 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  tf_http_archive(
  name = "gast_archive",
  build_file = clean_dep("//third_party:gast.BUILD"),
  - sha256 = "7068908321ecd2774f145193c4b34a11305bd104b4551b09273dfd1d6a374930",
  - strip_prefix = "gast-0.2.0",
  + sha256 = "fe939df4583692f0512161ec1c880e0a10e71e6a232da045ab8edd3756fbadf0",
  + strip_prefix = "gast-0.2.2",
  system_build_file = clean_dep("//third_party/systemlibs:gast.BUILD"),
  urls = [
  - "http://mirror.tensorflow.org/pypi.python.org/packages/5c/78/ff794fcae2ce8aa6323e789d1f8b3b7765f601e7702726f430e814822b96/gast-0.2.0.tar.gz",
  - "https://pypi.python.org/packages/5c/78/ff794fcae2ce8aa6323e789d1f8b3b7765f601e7702726f430e814822b96/gast-0.2.0.tar.gz",
  + "http://mirror.tensorflow.org/pypi.python.org/packages/4e/35/11749bf99b2d4e3cceb4d55ca22590b0d7c2c62b9de38ac4a4a7f4687421/gast-0.2.2.tar.gz",
  + "https://files.pythonhosted.org/packages/4e/35/11749bf99b2d4e3cceb4d55ca22590b0d7c2c62b9de38ac4a4a7f4687421/gast-0.2.2.tar.gz",
  ],
  )
  