prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  DockerContainersEnumerationTask JSON decode failure
  ```
  DockerContainersEnumerationTask Task failed with exception: [Expecting value: line 1 column 1 (char 0)]
  Traceback (most recent call last):
    File "/usr/local/lib/python3.6/dist-packages/turbinia-20210423.dev2+g1f137be-py3.6.egg/turbinia/workers/__init__.py", line 895, in run_wrapper
      self.result = self.run(evidence, self.result)
    File "/usr/local/lib/python3.6/dist-packages/turbinia-20210423.dev2+g1f137be-py3.6.egg/turbinia/workers/docker.py", line 107, in run
      containers_info = self.GetContainers(evidence)
    File "/usr/local/lib/python3.6/dist-packages/turbinia-20210423.dev2+g1f137be-py3.6.egg/turbinia/workers/docker.py", line 84, in GetContainers
      containers_info = json.loads(json_string)
    File "/usr/lib/python3.6/json/__init__.py", line 354, in loads
      return _default_decoder.decode(s)
    File "/usr/lib/python3.6/json/decoder.py", line 339, in decode
      obj, end = self.raw_decode(s, idx=_w(s, 0).end())
    File "/usr/lib/python3.6/json/decoder.py", line 357, in raw_decode
      raise JSONDecodeError("Expecting value", s, err.value) from None
  json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
  ```
  
  e2e test -> https://plaso-ci.log2timeline.net/jenkins/view/Turbinia/job/turbinia-e2e-googleclouddisk-dev/59/
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `turbinia/workers/docker.py`
  Content:
  ```
  1 # Copyright 2015 Google Inc.
  2 #
  3 # Licensed under the Apache License, Version 2.0 (the "License");
  4 # you may not use this file except in compliance with the License.
  5 # You may obtain a copy of the License at
  6 #
  7 #      http://www.apache.org/licenses/LICENSE-2.0
  8 #
  9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14 """Task for running docker-explorer."""
  15 
  16 from __future__ import unicode_literals
  17 
  18 import json
  19 import logging
  20 import subprocess
  21 
  22 from turbinia import TurbiniaException
  23 from turbinia.evidence import DockerContainer
  24 from turbinia.evidence import EvidenceState as state
  25 from turbinia.lib import utils
  26 from turbinia.workers import Priority
  27 from turbinia.workers import TurbiniaTask
  28 from turbinia.lib.docker_manager import GetDockerPath
  29 from turbinia import config
  30 
  31 log = logging.getLogger('turbinia')
  32 
  33 
  34 class DockerContainersEnumerationTask(TurbiniaTask):
  35   """Enumerates Docker containers on Linux"""
  36 
  37   REQUIRED_STATES = [state.ATTACHED, state.MOUNTED]
  38 
  39   def GetContainers(self, evidence):
  40     """Lists the containers from an input Evidence.
  41 
  42     We use subprocess to run the DockerExplorer script, instead of using the
  43     Python module, because we need to make sure all DockerExplorer code runs
  44     as root.
  45 
  46     Args:
  47       evidence (Evidence): the input Evidence.
  48 
  49     Returns:
  50       a list(dict) containing information about the containers found.
  51 
  52     Raises:
  53       TurbiniaException: when the docker-explorer tool cannot be found or failed
  54           to run.
  55     """
  56     config.LoadConfig()
  57     docker_dir = GetDockerPath(evidence.mount_path)
  58 
  59     containers_info = None
  60 
  61     # TODO(rgayon): use docker-explorer exposed constant when
  62     # https://github.com/google/docker-explorer/issues/80 is in.
  63     de_binary = utils.get_exe_path('de.py')
  64     if not de_binary:
  65       raise TurbiniaException('Cannot find de.py in path')
  66 
  67     docker_explorer_command = ['sudo', de_binary]
  68 
  69     if config.DEBUG_TASKS or evidence.config.get('debug_tasks'):
  70       docker_explorer_command.append('-d')
  71 
  72     docker_explorer_command.extend(['-r', docker_dir, 'list', 'all_containers'])
  73 
  74     log.info('Running {0:s}'.format(' '.join(docker_explorer_command)))
  75     try:
  76       json_string = subprocess.check_output(docker_explorer_command).decode(
  77           'utf-8')
  78     except json.JSONDecodeError as e:
  79       raise TurbiniaException(
  80           'Error decoding JSON output from de.py: {0!s}'.format(e))
  81     except subprocess.CalledProcessError as e:
  82       raise TurbiniaException('de.py returned an error: {0!s}'.format(e))
  83 
  84     containers_info = json.loads(json_string)
  85 
  86     return containers_info
  87 
  88   def run(self, evidence, result):
  89     """Run the docker-explorer tool to list containerss.
  90 
  91     Args:
  92        evidence (Evidence object):  The evidence to process
  93        result (TurbiniaTaskResult): The object to place task results into.
  94 
  95     Returns:
  96       TurbiniaTaskResult object.
  97     """
  98 
  99     status_report = ''
  100     success = False
  101 
  102     status_report = (
  103         'Error enumerating Docker containers, evidence has no mounted '
  104         'filesystem')
  105     found_containers = []
  106     try:
  107       containers_info = self.GetContainers(evidence)
  108       for container_info in containers_info:
  109         container_id = container_info.get('container_id')
  110         found_containers.append(container_id)
  111         container_evidence = DockerContainer(container_id=container_id)
  112         result.add_evidence(container_evidence, evidence.config)
  113       success = True
  114       status_report = 'Found {0!s} containers: {1:s}'.format(
  115           len(found_containers), ' '.join(found_containers))
  116     except TurbiniaException as e:
  117       status_report = 'Error enumerating Docker containers: {0!s}'.format(e)
  118 
  119     result.report_priority = Priority.LOW
  120     result.report_data = status_report
  121     result.close(self, success=success, status=status_report)
  122     return result
  123
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/turbinia/workers/docker.py b/turbinia/workers/docker.py
  --- a/turbinia/workers/docker.py
  +++ b/turbinia/workers/docker.py
  @@ -75,14 +75,14 @@
       try:
         json_string = subprocess.check_output(docker_explorer_command).decode(
             'utf-8')
  +      containers_info = json.loads(json_string)
       except json.JSONDecodeError as e:
         raise TurbiniaException(
  -          'Error decoding JSON output from de.py: {0!s}'.format(e))
  +          'Error decoding JSON output from de.py: {0!s} {1!s}'.format(
  +              e, json_string))
       except subprocess.CalledProcessError as e:
         raise TurbiniaException('de.py returned an error: {0!s}'.format(e))
   
  -    containers_info = json.loads(json_string)
  -
       return containers_info
   
     def run(self, evidence, result):
  
verification_info: {"golden_diff": "diff --git a/turbinia/workers/docker.py b/turbinia/workers/docker.py\n--- a/turbinia/workers/docker.py\n+++ b/turbinia/workers/docker.py\n@@ -75,14 +75,14 @@\n     try:\n       json_string = subprocess.check_output(docker_explorer_command).decode(\n           'utf-8')\n+      containers_info = json.loads(json_string)\n     except json.JSONDecodeError as e:\n       raise TurbiniaException(\n-          'Error decoding JSON output from de.py: {0!s}'.format(e))\n+          'Error decoding JSON output from de.py: {0!s} {1!s}'.format(\n+              e, json_string))\n     except subprocess.CalledProcessError as e:\n       raise TurbiniaException('de.py returned an error: {0!s}'.format(e))\n \n-    containers_info = json.loads(json_string)\n-\n     return containers_info\n \n   def run(self, evidence, result):\n", "issue": "DockerContainersEnumerationTask JSON decode failure\n```\r\nDockerContainersEnumerationTask Task failed with exception: [Expecting value: line 1 column 1 (char 0)]\r\nTraceback (most recent call last):\r\n  File \"/usr/local/lib/python3.6/dist-packages/turbinia-20210423.dev2+g1f137be-py3.6.egg/turbinia/workers/__init__.py\", line 895, in run_wrapper\r\n    self.result = self.run(evidence, self.result)\r\n  File \"/usr/local/lib/python3.6/dist-packages/turbinia-20210423.dev2+g1f137be-py3.6.egg/turbinia/workers/docker.py\", line 107, in run\r\n    containers_info = self.GetContainers(evidence)\r\n  File \"/usr/local/lib/python3.6/dist-packages/turbinia-20210423.dev2+g1f137be-py3.6.egg/turbinia/workers/docker.py\", line 84, in GetContainers\r\n    containers_info = json.loads(json_string)\r\n  File \"/usr/lib/python3.6/json/__init__.py\", line 354, in loads\r\n    return _default_decoder.decode(s)\r\n  File \"/usr/lib/python3.6/json/decoder.py\", line 339, in decode\r\n    obj, end = self.raw_decode(s, idx=_w(s, 0).end())\r\n  File \"/usr/lib/python3.6/json/decoder.py\", line 357, in raw_decode\r\n    raise JSONDecodeError(\"Expecting value\", s, err.value) from None\r\njson.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)\r\n```\r\n\r\ne2e test -> https://plaso-ci.log2timeline.net/jenkins/view/Turbinia/job/turbinia-e2e-googleclouddisk-dev/59/\n", "before_files": [{"content": "# Copyright 2015 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\"\"\"Task for running docker-explorer.\"\"\"\n\nfrom __future__ import unicode_literals\n\nimport json\nimport logging\nimport subprocess\n\nfrom turbinia import TurbiniaException\nfrom turbinia.evidence import DockerContainer\nfrom turbinia.evidence import EvidenceState as state\nfrom turbinia.lib import utils\nfrom turbinia.workers import Priority\nfrom turbinia.workers import TurbiniaTask\nfrom turbinia.lib.docker_manager import GetDockerPath\nfrom turbinia import config\n\nlog = logging.getLogger('turbinia')\n\n\nclass DockerContainersEnumerationTask(TurbiniaTask):\n  \"\"\"Enumerates Docker containers on Linux\"\"\"\n\n  REQUIRED_STATES = [state.ATTACHED, state.MOUNTED]\n\n  def GetContainers(self, evidence):\n    \"\"\"Lists the containers from an input Evidence.\n\n    We use subprocess to run the DockerExplorer script, instead of using the\n    Python module, because we need to make sure all DockerExplorer code runs\n    as root.\n\n    Args:\n      evidence (Evidence): the input Evidence.\n\n    Returns:\n      a list(dict) containing information about the containers found.\n\n    Raises:\n      TurbiniaException: when the docker-explorer tool cannot be found or failed\n          to run.\n    \"\"\"\n    config.LoadConfig()\n    docker_dir = GetDockerPath(evidence.mount_path)\n\n    containers_info = None\n\n    # TODO(rgayon): use docker-explorer exposed constant when\n    # https://github.com/google/docker-explorer/issues/80 is in.\n    de_binary = utils.get_exe_path('de.py')\n    if not de_binary:\n      raise TurbiniaException('Cannot find de.py in path')\n\n    docker_explorer_command = ['sudo', de_binary]\n\n    if config.DEBUG_TASKS or evidence.config.get('debug_tasks'):\n      docker_explorer_command.append('-d')\n\n    docker_explorer_command.extend(['-r', docker_dir, 'list', 'all_containers'])\n\n    log.info('Running {0:s}'.format(' '.join(docker_explorer_command)))\n    try:\n      json_string = subprocess.check_output(docker_explorer_command).decode(\n          'utf-8')\n    except json.JSONDecodeError as e:\n      raise TurbiniaException(\n          'Error decoding JSON output from de.py: {0!s}'.format(e))\n    except subprocess.CalledProcessError as e:\n      raise TurbiniaException('de.py returned an error: {0!s}'.format(e))\n\n    containers_info = json.loads(json_string)\n\n    return containers_info\n\n  def run(self, evidence, result):\n    \"\"\"Run the docker-explorer tool to list containerss.\n\n    Args:\n       evidence (Evidence object):  The evidence to process\n       result (TurbiniaTaskResult): The object to place task results into.\n\n    Returns:\n      TurbiniaTaskResult object.\n    \"\"\"\n\n    status_report = ''\n    success = False\n\n    status_report = (\n        'Error enumerating Docker containers, evidence has no mounted '\n        'filesystem')\n    found_containers = []\n    try:\n      containers_info = self.GetContainers(evidence)\n      for container_info in containers_info:\n        container_id = container_info.get('container_id')\n        found_containers.append(container_id)\n        container_evidence = DockerContainer(container_id=container_id)\n        result.add_evidence(container_evidence, evidence.config)\n      success = True\n      status_report = 'Found {0!s} containers: {1:s}'.format(\n          len(found_containers), ' '.join(found_containers))\n    except TurbiniaException as e:\n      status_report = 'Error enumerating Docker containers: {0!s}'.format(e)\n\n    result.report_priority = Priority.LOW\n    result.report_data = status_report\n    result.close(self, success=success, status=status_report)\n    return result\n", "path": "turbinia/workers/docker.py"}], "after_files": [{"content": "# Copyright 2015 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\"\"\"Task for running docker-explorer.\"\"\"\n\nfrom __future__ import unicode_literals\n\nimport json\nimport logging\nimport subprocess\n\nfrom turbinia import TurbiniaException\nfrom turbinia.evidence import DockerContainer\nfrom turbinia.evidence import EvidenceState as state\nfrom turbinia.lib import utils\nfrom turbinia.workers import Priority\nfrom turbinia.workers import TurbiniaTask\nfrom turbinia.lib.docker_manager import GetDockerPath\nfrom turbinia import config\n\nlog = logging.getLogger('turbinia')\n\n\nclass DockerContainersEnumerationTask(TurbiniaTask):\n  \"\"\"Enumerates Docker containers on Linux\"\"\"\n\n  REQUIRED_STATES = [state.ATTACHED, state.MOUNTED]\n\n  def GetContainers(self, evidence):\n    \"\"\"Lists the containers from an input Evidence.\n\n    We use subprocess to run the DockerExplorer script, instead of using the\n    Python module, because we need to make sure all DockerExplorer code runs\n    as root.\n\n    Args:\n      evidence (Evidence): the input Evidence.\n\n    Returns:\n      a list(dict) containing information about the containers found.\n\n    Raises:\n      TurbiniaException: when the docker-explorer tool cannot be found or failed\n          to run.\n    \"\"\"\n    config.LoadConfig()\n    docker_dir = GetDockerPath(evidence.mount_path)\n\n    containers_info = None\n\n    # TODO(rgayon): use docker-explorer exposed constant when\n    # https://github.com/google/docker-explorer/issues/80 is in.\n    de_binary = utils.get_exe_path('de.py')\n    if not de_binary:\n      raise TurbiniaException('Cannot find de.py in path')\n\n    docker_explorer_command = ['sudo', de_binary]\n\n    if config.DEBUG_TASKS or evidence.config.get('debug_tasks'):\n      docker_explorer_command.append('-d')\n\n    docker_explorer_command.extend(['-r', docker_dir, 'list', 'all_containers'])\n\n    log.info('Running {0:s}'.format(' '.join(docker_explorer_command)))\n    try:\n      json_string = subprocess.check_output(docker_explorer_command).decode(\n          'utf-8')\n      containers_info = json.loads(json_string)\n    except json.JSONDecodeError as e:\n      raise TurbiniaException(\n          'Error decoding JSON output from de.py: {0!s} {1!s}'.format(\n              e, json_string))\n    except subprocess.CalledProcessError as e:\n      raise TurbiniaException('de.py returned an error: {0!s}'.format(e))\n\n    return containers_info\n\n  def run(self, evidence, result):\n    \"\"\"Run the docker-explorer tool to list containerss.\n\n    Args:\n       evidence (Evidence object):  The evidence to process\n       result (TurbiniaTaskResult): The object to place task results into.\n\n    Returns:\n      TurbiniaTaskResult object.\n    \"\"\"\n\n    status_report = ''\n    success = False\n\n    status_report = (\n        'Error enumerating Docker containers, evidence has no mounted '\n        'filesystem')\n    found_containers = []\n    try:\n      containers_info = self.GetContainers(evidence)\n      for container_info in containers_info:\n        container_id = container_info.get('container_id')\n        found_containers.append(container_id)\n        container_evidence = DockerContainer(container_id=container_id)\n        result.add_evidence(container_evidence, evidence.config)\n      success = True\n      status_report = 'Found {0!s} containers: {1:s}'.format(\n          len(found_containers), ' '.join(found_containers))\n    except TurbiniaException as e:\n      status_report = 'Error enumerating Docker containers: {0!s}'.format(e)\n\n    result.report_priority = Priority.LOW\n    result.report_data = status_report\n    result.close(self, success=success, status=status_report)\n    return result\n", "path": "turbinia/workers/docker.py"}]}