[
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    "cmd": [
      "python",
      "-u",
      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
      "--path",
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      "--url",
      "https://chromium.googlesource.com/infra/luci/client-py.git"
    ],
    "name": "git setup (swarming_client)"
  },
  {
    "cmd": [
      "git",
      "fetch",
      "origin",
      "master",
      "--progress"
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      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
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    "infra_step": true,
    "name": "git fetch (swarming_client)"
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    "cmd": [
      "git",
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      "FETCH_HEAD"
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    "cwd": "[START_DIR]/swarming.client",
    "infra_step": true,
    "name": "git checkout (swarming_client)"
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  {
    "cmd": [
      "git",
      "rev-parse",
      "HEAD"
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    "cwd": "[START_DIR]/swarming.client",
    "infra_step": true,
    "name": "read revision",
    "stdout": "/path/to/tmp/",
    "~followup_annotations": [
      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@"
    ]
  },
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    "cmd": [
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      "-d",
      "-x"
    ],
    "cwd": "[START_DIR]/swarming.client",
    "infra_step": true,
    "name": "git clean (swarming_client)"
  },
  {
    "cmd": [
      "git",
      "submodule",
      "sync"
    ],
    "cwd": "[START_DIR]/swarming.client",
    "infra_step": true,
    "name": "submodule sync (swarming_client)"
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  {
    "cmd": [
      "git",
      "submodule",
      "update",
      "--init",
      "--recursive"
    ],
    "cwd": "[START_DIR]/swarming.client",
    "infra_step": true,
    "name": "submodule update (swarming_client)"
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    "cmd": [
      "python",
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      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
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      "RECIPE_REPO[depot_tools]/gsutil.py",
      "----",
      "ls",
      "gs://chromium-v8/isolated/foo.v8/V8 Foobar/a0.json"
    ],
    "infra_step": true,
    "name": "gsutil lookup isolates for #0",
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      "@@@STEP_LINK@a0@https://chromium.googlesource.com/v8/v8/+/a0@@@"
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    "cmd": [
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      "/path/to/tmp/json",
      "--url",
      "https://chromium.googlesource.com/v8/v8/+log/a0~1",
      "--format",
      "json",
      "--log-limit",
      "1"
    ],
    "name": "get revision #1",
    "~followup_annotations": [
      "@@@STEP_TEXT@<br />3 commits fetched@@@",
      "@@@STEP_LOG_LINE@json.output@{@@@",
      "@@@STEP_LOG_LINE@json.output@  \"log\": [@@@",
      "@@@STEP_LOG_LINE@json.output@    {@@@",
      "@@@STEP_LOG_LINE@json.output@      \"commit\": \"a1\"@@@",
      "@@@STEP_LOG_LINE@json.output@    }, @@@",
      "@@@STEP_LOG_LINE@json.output@    {@@@",
      "@@@STEP_LOG_LINE@json.output@      \"commit\": \"a2\"@@@",
      "@@@STEP_LOG_LINE@json.output@    }, @@@",
      "@@@STEP_LOG_LINE@json.output@    {@@@",
      "@@@STEP_LOG_LINE@json.output@      \"commit\": \"a3\"@@@",
      "@@@STEP_LOG_LINE@json.output@    }@@@",
      "@@@STEP_LOG_LINE@json.output@  ]@@@",
      "@@@STEP_LOG_LINE@json.output@}@@@",
      "@@@STEP_LOG_END@json.output@@@"
    ]
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    "cmd": [
      "python",
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      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
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      "RECIPE_REPO[depot_tools]/gsutil.py",
      "----",
      "ls",
      "gs://chromium-v8/isolated/foo.v8/V8 Foobar/a1.json"
    ],
    "infra_step": true,
    "name": "gsutil lookup isolates for #1",
    "stderr": "/path/to/tmp/",
    "~followup_annotations": [
      "@@@STEP_LINK@a1@https://chromium.googlesource.com/v8/v8/+/a1@@@"
    ]
  },
  {
    "cmd": [],
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    "~followup_annotations": [
      "@@@STEP_FAILURE@@@"
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      "RECIPE_REPO[depot_tools]/gsutil.py",
      "----",
      "cp",
      "gs://chromium-v8/isolated/foo.v8/V8 Foobar/a1.json",
      "/path/to/tmp/json"
    ],
    "infra_step": true,
    "name": "calibration attempt 1.gsutil get isolates for #1",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_LOG_LINE@json.output@{@@@",
      "@@@STEP_LOG_LINE@json.output@  \"foo_isolated\": \"[dummy hash for foo_isolated]\"@@@",
      "@@@STEP_LOG_LINE@json.output@}@@@",
      "@@@STEP_LOG_END@json.output@@@"
    ]
  },
  {
    "cmd": [],
    "name": "calibration attempt 1.check mjsunit/foobar at #1",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@",
      "@@@STEP_TEXT@2 failures@@@",
      "@@@STEP_FAILURE@@@"
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    "cmd": [
      "python",
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      "--swarming",
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      "--isolate-server",
      "https://isolateserver.appspot.com",
      "--namespace",
      "default-gzip",
      "--priority",
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      "--task-name",
      "check mjsunit/foobar at #1 - shard 0/Ubuntu-14.04/[dummy has",
      "--dump-json",
      "/path/to/tmp/json",
      "--expiration",
      "3600",
      "--io-timeout",
      "1200",
      "--hard-timeout",
      "3600",
      "--dimension",
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      "--dimension",
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      "--dimension",
      "os",
      "Ubuntu-14.04",
      "--dimension",
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      "Chrome",
      "--named-cache",
      "swarming_module_cache_vpython",
      ".swarming_module_cache/vpython",
      "--tag",
      "build_is_experimental:false",
      "--tag",
      "data:[dummy hash for foo_isolated]",
      "--tag",
      "name:check",
      "--tag",
      "purpose:v8-flake-bisect",
      "--tag",
      "stepname:check mjsunit/foobar at #1 - shard 0",
      "--user",
      "v8-flake-bisect",
      "--cipd-package",
      ".swarming_module:infra/python/cpython/${platform}:TEST_VERSION",
      "--cipd-package",
      ".swarming_module:infra/tools/luci/logdog/butler/${platform}:TEST_VERSION",
      "--cipd-package",
      ".swarming_module:infra/tools/luci/vpython-native/${platform}:TEST_VERSION",
      "--cipd-package",
      ".swarming_module:infra/tools/luci/vpython/${platform}:TEST_VERSION",
      "--env-prefix",
      "PATH",
      ".swarming_module",
      "--env-prefix",
      "PATH",
      ".swarming_module/bin",
      "--env-prefix",
      "VPYTHON_VIRTUALENV_ROOT",
      ".swarming_module_cache/vpython",
      "--isolated",
      "[dummy hash for foo_isolated]",
      "--raw-cmd",
      "--",
      "tools/run-tests.py",
      "--progress=verbose",
      "--mode=Debug",
      "--outdir=out",
      "--timeout=20",
      "--swarming",
      "--variants=stress_foo",
      "--foo-flag",
      "--bar-flag",
      "mjsunit/foobar",
      "--random-seed-stress-count=64",
      "--exit-after-n-failures=4"
    ],
    "infra_step": true,
    "name": "calibration attempt 1.check mjsunit/foobar at #1.[trigger] check mjsunit/foobar at #1 - shard 0",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@",
      "@@@STEP_TEXT@Run on OS: 'Ubuntu-14.04'@@@",
      "@@@STEP_LOG_LINE@json.output@{@@@",
      "@@@STEP_LOG_LINE@json.output@  \"base_task_name\": \"check mjsunit/foobar at #1 - shard 0/Ubuntu-14.04/[dummy has\", @@@",
      "@@@STEP_LOG_LINE@json.output@  \"tasks\": {@@@",
      "@@@STEP_LOG_LINE@json.output@    \"check mjsunit/foobar at #1 - shard 0/Ubuntu-14.04/[dummy has\": {@@@",
      "@@@STEP_LOG_LINE@json.output@      \"shard_index\": 0, @@@",
      "@@@STEP_LOG_LINE@json.output@      \"task_id\": \"10000\", @@@",
      "@@@STEP_LOG_LINE@json.output@      \"view_url\": \"https://chromium-swarm.appspot.com/user/task/10000\"@@@",
      "@@@STEP_LOG_LINE@json.output@    }@@@",
      "@@@STEP_LOG_LINE@json.output@  }@@@",
      "@@@STEP_LOG_LINE@json.output@}@@@",
      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LINK@shard #0@https://chromium-swarm.appspot.com/user/task/10000@@@"
    ]
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    "cmd": [
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      "--isolate-server",
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      "--priority",
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      "--task-name",
      "check mjsunit/foobar at #1 - shard 1/Ubuntu-14.04/[dummy has",
      "--dump-json",
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      "--expiration",
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      "--io-timeout",
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      "--hard-timeout",
      "3600",
      "--dimension",
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      "--dimension",
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      "--dimension",
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      "--named-cache",
      "swarming_module_cache_vpython",
      ".swarming_module_cache/vpython",
      "--tag",
      "build_is_experimental:false",
      "--tag",
      "data:[dummy hash for foo_isolated]",
      "--tag",
      "name:check",
      "--tag",
      "purpose:v8-flake-bisect",
      "--tag",
      "stepname:check mjsunit/foobar at #1 - shard 1",
      "--user",
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      "--cipd-package",
      ".swarming_module:infra/python/cpython/${platform}:TEST_VERSION",
      "--cipd-package",
      ".swarming_module:infra/tools/luci/logdog/butler/${platform}:TEST_VERSION",
      "--cipd-package",
      ".swarming_module:infra/tools/luci/vpython-native/${platform}:TEST_VERSION",
      "--cipd-package",
      ".swarming_module:infra/tools/luci/vpython/${platform}:TEST_VERSION",
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      "--env-prefix",
      "VPYTHON_VIRTUALENV_ROOT",
      ".swarming_module_cache/vpython",
      "--isolated",
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      "--raw-cmd",
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      "--mode=Debug",
      "--outdir=out",
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      "--swarming",
      "--variants=stress_foo",
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      "--bar-flag",
      "mjsunit/foobar",
      "--random-seed-stress-count=64",
      "--exit-after-n-failures=4"
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    "infra_step": true,
    "name": "calibration attempt 1.check mjsunit/foobar at #1.[trigger] check mjsunit/foobar at #1 - shard 1",
    "~followup_annotations": [
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      "@@@STEP_TEXT@Run on OS: 'Ubuntu-14.04'@@@",
      "@@@STEP_LOG_LINE@json.output@{@@@",
      "@@@STEP_LOG_LINE@json.output@  \"base_task_name\": \"check mjsunit/foobar at #1 - shard 1/Ubuntu-14.04/[dummy has\", @@@",
      "@@@STEP_LOG_LINE@json.output@  \"tasks\": {@@@",
      "@@@STEP_LOG_LINE@json.output@    \"check mjsunit/foobar at #1 - shard 1/Ubuntu-14.04/[dummy has\": {@@@",
      "@@@STEP_LOG_LINE@json.output@      \"shard_index\": 0, @@@",
      "@@@STEP_LOG_LINE@json.output@      \"task_id\": \"110000\", @@@",
      "@@@STEP_LOG_LINE@json.output@      \"view_url\": \"https://chromium-swarm.appspot.com/user/task/110000\"@@@",
      "@@@STEP_LOG_LINE@json.output@    }@@@",
      "@@@STEP_LOG_LINE@json.output@  }@@@",
      "@@@STEP_LOG_LINE@json.output@}@@@",
      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LINK@shard #0@https://chromium-swarm.appspot.com/user/task/110000@@@"
    ]
  },
  {
    "cmd": [],
    "name": "calibration attempt 1.check mjsunit/foobar at #1.ensure swarming",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@"
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    "cmd": [
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      "infra/tools/luci/swarming/${platform} git_revision:1399f5bdee4cf1c0826b64cf103418b1b9e7c15b",
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    "infra_step": true,
    "name": "calibration attempt 1.check mjsunit/foobar at #1.ensure swarming.ensure_installed",
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      "@@@STEP_LOG_LINE@json.output@{@@@",
      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
      "@@@STEP_LOG_LINE@json.output@      {@@@",
      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:139\", @@@",
      "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/luci/swarming/resolved-platform\"@@@",
      "@@@STEP_LOG_LINE@json.output@      }@@@",
      "@@@STEP_LOG_LINE@json.output@    ]@@@",
      "@@@STEP_LOG_LINE@json.output@  }@@@",
      "@@@STEP_LOG_LINE@json.output@}@@@",
      "@@@STEP_LOG_END@json.output@@@"
    ]
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    "cmd": [
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      "RECIPE_REPO[build]/scripts/tools/runit.py",
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      "RECIPE_MODULE[build::chromium_swarming]/resources/collect_task.py",
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      "--merge-script-stdout-file",
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      "--merge-additional-args",
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      "/path/to/tmp/json",
      "--",
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      "https://chromium-swarm.appspot.com",
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      "-task-summary-python",
      "-task-output-stdout",
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      "{\"tasks\": [{\"task_id\": \"10000\"}]}"
    ],
    "env_prefixes": {
      "PATH": [
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    "name": "calibration attempt 1.check mjsunit/foobar at #1.check mjsunit/foobar at #1 - shard 0",
    "~followup_annotations": [
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      "@@@STEP_TEXT@Run on OS: 'Ubuntu-14.04'<br>Pending time: 0:01:11<br>Shard duration: 0:01:00@@@",
      "@@@STEP_LOG_LINE@json.output@{}@@@",
      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@{@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@  \"shards\": [@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@    {@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"bot_id\": \"vm30\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"completed_ts\": \"2014-09-25T01:43:11.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"created_ts\": \"2014-09-25T01:41:00.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"duration\": 31.5, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"exit_code\": 0, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"failure\": false, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"internal_failure\": false, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"modified_ts\": \"2014-09-25 01:42:00\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"name\": \"heartbeat-canary-2014-09-25_01:41:55-os=Windows\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"output\": \"=== All tests succeeded\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"outputs_ref\": {@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"isolated\": \"abc123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"isolatedserver\": \"https://isolateserver.appspot.com\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"namespace\": \"default-gzip\"@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      }, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"started_ts\": \"2014-09-25T01:42:11.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"state\": \"COMPLETED\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"task_id\": \"148aa78d7aa0000\"@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@    }@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@  ]@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@}@@@",
      "@@@STEP_LOG_END@chromium_swarming.summary@@@",
      "@@@STEP_LOG_LINE@Merge script log@@@@",
      "@@@STEP_LOG_END@Merge script log@@@",
      "@@@STEP_LINK@shard #0 isolated out@https://isolateserver.appspot.com/browse?namespace=default-gzip&hash=abc123@@@"
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      "--task-output-dir",
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      "--merge-additional-args",
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      "https://chromium-swarm.appspot.com",
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    "env_prefixes": {
      "PATH": [
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      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@{@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@  \"shards\": [@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@    {@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"bot_id\": \"vm30\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"completed_ts\": \"2014-09-25T01:43:11.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"created_ts\": \"2014-09-25T01:41:00.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"duration\": 31.5, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"exit_code\": 1, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"failure\": false, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"internal_failure\": false, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"modified_ts\": \"2014-09-25 01:42:00\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"name\": \"heartbeat-canary-2014-09-25_01:41:55-os=Windows\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"output\": \"=== 2 tests failed\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"outputs_ref\": {@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"isolated\": \"abc123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"isolatedserver\": \"https://isolateserver.appspot.com\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"namespace\": \"default-gzip\"@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      }, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"started_ts\": \"2014-09-25T01:42:11.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"state\": \"COMPLETED\", @@@",
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      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"created_ts\": \"2014-09-25T01:41:00.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"duration\": 31.5, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"exit_code\": 1, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"failure\": false, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"internal_failure\": false, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"modified_ts\": \"2014-09-25 01:42:00\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"name\": \"heartbeat-canary-2014-09-25_01:41:55-os=Windows\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"output\": \"=== 1 tests failed\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"outputs_ref\": {@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"isolated\": \"abc123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"isolatedserver\": \"https://isolateserver.appspot.com\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"namespace\": \"default-gzip\"@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      }, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"started_ts\": \"2014-09-25T01:42:11.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"state\": \"COMPLETED\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"task_id\": \"148aa78d7aa0000\"@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@    }@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@  ]@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@}@@@",
      "@@@STEP_LOG_END@chromium_swarming.summary@@@",
      "@@@STEP_LOG_LINE@Merge script log@@@@",
      "@@@STEP_LOG_END@Merge script log@@@",
      "@@@STEP_LINK@shard #0 isolated out@https://isolateserver.appspot.com/browse?namespace=default-gzip&hash=abc123@@@",
      "@@@STEP_FAILURE@@@"
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      "-task-summary-python",
      "-task-output-stdout",
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      "{\"tasks\": [{\"task_id\": \"140000\"}]}"
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    "env_prefixes": {
      "PATH": [
        "[CACHE]/swarming_client"
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    "name": "calibration attempt 2.check mjsunit/foobar at #1.check mjsunit/foobar at #1 - shard 2",
    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@2@@@",
      "@@@STEP_TEXT@Run on OS: 'Ubuntu-14.04'<br>Pending time: 0:01:11<br>Shard duration: 0:01:00@@@",
      "@@@STEP_LOG_LINE@json.output@{}@@@",
      "@@@STEP_LOG_END@json.output@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@{@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@  \"shards\": [@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@    {@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"bot_id\": \"vm30\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"completed_ts\": \"2014-09-25T01:43:11.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"created_ts\": \"2014-09-25T01:41:00.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"duration\": 31.5, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"exit_code\": 1, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"failure\": false, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"internal_failure\": false, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"modified_ts\": \"2014-09-25 01:42:00\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"name\": \"heartbeat-canary-2014-09-25_01:41:55-os=Windows\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"output\": \"=== 2 tests failed\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"outputs_ref\": {@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"isolated\": \"abc123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"isolatedserver\": \"https://isolateserver.appspot.com\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@        \"namespace\": \"default-gzip\"@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      }, @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"started_ts\": \"2014-09-25T01:42:11.123\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"state\": \"COMPLETED\", @@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@      \"task_id\": \"148aa78d7aa0000\"@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@    }@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@  ]@@@",
      "@@@STEP_LOG_LINE@chromium_swarming.summary@}@@@",
      "@@@STEP_LOG_END@chromium_swarming.summary@@@",
      "@@@STEP_LOG_LINE@Merge script log@@@@",
      "@@@STEP_LOG_END@Merge script log@@@",
      "@@@STEP_LINK@shard #0 isolated out@https://isolateserver.appspot.com/browse?namespace=default-gzip&hash=abc123@@@",
      "@@@STEP_FAILURE@@@"
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      "python",
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      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
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      "/path/to/tmp/json",
      "rmtree",
      "[CLEANUP]/v8-flake-bisect-_tmp_2"
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    "infra_step": true,
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    "~followup_annotations": [
      "@@@STEP_NEST_LEVEL@1@@@"
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      "@@@STEP_LOG_LINE@config@  {@@@",
      "@@@STEP_LOG_LINE@config@    \"bisect_buildername\": \"V8 Foobar\",@@@",
      "@@@STEP_LOG_LINE@config@    \"bisect_mastername\": \"foo.v8\",@@@",
      "@@@STEP_LOG_LINE@config@    \"bug_url\": \"<bug-url>\",@@@",
      "@@@STEP_LOG_LINE@config@    \"build_config\": \"Debug\",@@@",
      "@@@STEP_LOG_LINE@config@    \"extra_args\": [@@@",
      "@@@STEP_LOG_LINE@config@      \"--foo-flag\",@@@",
      "@@@STEP_LOG_LINE@config@      \"--bar-flag\",@@@",
      "@@@STEP_LOG_LINE@config@    ],@@@",
      "@@@STEP_LOG_LINE@config@    \"isolated_name\": \"foo_isolated\",@@@",
      "@@@STEP_LOG_LINE@config@    \"num_shards\": 4,@@@",
      "@@@STEP_LOG_LINE@config@    \"repetitions\": 64,@@@",
      "@@@STEP_LOG_LINE@config@    \"swarming_dimensions\": [@@@",
      "@@@STEP_LOG_LINE@config@      \"os:Ubuntu-14.04\",@@@",
      "@@@STEP_LOG_LINE@config@      \"cpu:x86-64\",@@@",
      "@@@STEP_LOG_LINE@config@    ],@@@",
      "@@@STEP_LOG_LINE@config@    \"test_name\": \"mjsunit/foobar\",@@@",
      "@@@STEP_LOG_LINE@config@    \"timeout_sec\": 20,@@@",
      "@@@STEP_LOG_LINE@config@    \"total_timeout_sec\": 0,@@@",
      "@@@STEP_LOG_LINE@config@    \"variant\": \"stress_foo\",@@@",
      "@@@STEP_LOG_LINE@config@  },@@@",
      "@@@STEP_LOG_LINE@config@]@@@",
      "@@@STEP_LOG_END@config@@@"
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    "~followup_annotations": [
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    "infra_step": true,
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    "~followup_annotations": [
      "@@@STEP_LOG_LINE@json.output@{@@@",
      "@@@STEP_LOG_LINE@json.output@  \"foo_isolated\": \"[dummy hash for foo_isolated]\"@@@",
      "@@@STEP_LOG_LINE@json.output@}@@@",
      "@@@STEP_LOG_END@json.output@@@"
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    "cmd": [],
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      "@@@STEP_LOG_LINE@json.output@      \"view_url\": \"https://chromium-swarm.appspot.com/user/task/160000\"@@@",
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      "@@@STEP_LOG_LINE@json.output@  }@@@",
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      "@@@STEP_LOG_END@json.output@@@",
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      "@@@STEP_LOG_LINE@json.output@      \"task_id\": \"170000\", @@@",
      "@@@STEP_LOG_LINE@json.output@      \"view_url\": \"https://chromium-swarm.appspot.com/user/task/170000\"@@@",
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