prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Locust stopped working after Flast 2.0 got released
  in setup.py I can see:
  ` "flask>=1.1.2", `
  I guess it should be hardcoded to ==1.1.2 for now.
  
  it crashes with:
  ```
  File "/root/.local/share/virtualenvs/xxxxxxx/lib/python3.6/site-packages/locust/web.py", line 102, in __init__
  app.jinja_options["extensions"].append("jinja2.ext.do")
  KeyError: 'extensions'
  ```
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `setup.py`
  Content:
  ```
  1 # -*- coding: utf-8 -*-
  2 import ast
  3 import os
  4 import re
  5 import sys
  6 
  7 from setuptools import find_packages, setup
  8 
  9 ROOT_PATH = os.path.abspath(os.path.dirname(__file__))
  10 
  11 # parse version from locust/__init__.py
  12 _version_re = re.compile(r"__version__\s+=\s+(.*)")
  13 _init_file = os.path.join(ROOT_PATH, "locust", "__init__.py")
  14 with open(_init_file, "rb") as f:
  15     version = str(ast.literal_eval(_version_re.search(f.read().decode("utf-8")).group(1)))
  16 
  17 setup(
  18     name="locust",
  19     version=version,
  20     install_requires=[
  21         "gevent>=20.9.0",
  22         "flask>=1.1.2",
  23         "Werkzeug>=1.0.1",
  24         "requests>=2.9.1",
  25         "msgpack>=0.6.2",
  26         "pyzmq>=16.0.2",
  27         "geventhttpclient>=1.4.4",
  28         "ConfigArgParse>=1.0",
  29         "psutil>=5.6.7",
  30         "Flask-BasicAuth>=0.2.0",
  31     ],
  32     test_suite="locust.test",
  33     tests_require=[
  34         "cryptography",
  35         "mock",
  36         "pyquery",
  37     ],
  38     extras_require={
  39         ":sys_platform == 'win32'": ["pywin32"],
  40     },
  41 )
  42
  ```
  --- 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/setup.py b/setup.py
  --- a/setup.py
  +++ b/setup.py
  @@ -19,7 +19,7 @@
       version=version,
       install_requires=[
           "gevent>=20.9.0",
  -        "flask>=1.1.2",
  +        "flask==1.1.2",
           "Werkzeug>=1.0.1",
           "requests>=2.9.1",
           "msgpack>=0.6.2",
  
verification_info: {"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -19,7 +19,7 @@\n     version=version,\n     install_requires=[\n         \"gevent>=20.9.0\",\n-        \"flask>=1.1.2\",\n+        \"flask==1.1.2\",\n         \"Werkzeug>=1.0.1\",\n         \"requests>=2.9.1\",\n         \"msgpack>=0.6.2\",\n", "issue": "Locust stopped working after Flast 2.0 got released\nin setup.py I can see:\r\n` \"flask>=1.1.2\", `\r\nI guess it should be hardcoded to ==1.1.2 for now.\r\n\r\nit crashes with:\r\n```\r\nFile \"/root/.local/share/virtualenvs/xxxxxxx/lib/python3.6/site-packages/locust/web.py\", line 102, in __init__\r\napp.jinja_options[\"extensions\"].append(\"jinja2.ext.do\")\r\nKeyError: 'extensions'\r\n```\n", "before_files": [{"content": "# -*- coding: utf-8 -*-\nimport ast\nimport os\nimport re\nimport sys\n\nfrom setuptools import find_packages, setup\n\nROOT_PATH = os.path.abspath(os.path.dirname(__file__))\n\n# parse version from locust/__init__.py\n_version_re = re.compile(r\"__version__\\s+=\\s+(.*)\")\n_init_file = os.path.join(ROOT_PATH, \"locust\", \"__init__.py\")\nwith open(_init_file, \"rb\") as f:\n    version = str(ast.literal_eval(_version_re.search(f.read().decode(\"utf-8\")).group(1)))\n\nsetup(\n    name=\"locust\",\n    version=version,\n    install_requires=[\n        \"gevent>=20.9.0\",\n        \"flask>=1.1.2\",\n        \"Werkzeug>=1.0.1\",\n        \"requests>=2.9.1\",\n        \"msgpack>=0.6.2\",\n        \"pyzmq>=16.0.2\",\n        \"geventhttpclient>=1.4.4\",\n        \"ConfigArgParse>=1.0\",\n        \"psutil>=5.6.7\",\n        \"Flask-BasicAuth>=0.2.0\",\n    ],\n    test_suite=\"locust.test\",\n    tests_require=[\n        \"cryptography\",\n        \"mock\",\n        \"pyquery\",\n    ],\n    extras_require={\n        \":sys_platform == 'win32'\": [\"pywin32\"],\n    },\n)\n", "path": "setup.py"}], "after_files": [{"content": "# -*- coding: utf-8 -*-\nimport ast\nimport os\nimport re\nimport sys\n\nfrom setuptools import find_packages, setup\n\nROOT_PATH = os.path.abspath(os.path.dirname(__file__))\n\n# parse version from locust/__init__.py\n_version_re = re.compile(r\"__version__\\s+=\\s+(.*)\")\n_init_file = os.path.join(ROOT_PATH, \"locust\", \"__init__.py\")\nwith open(_init_file, \"rb\") as f:\n    version = str(ast.literal_eval(_version_re.search(f.read().decode(\"utf-8\")).group(1)))\n\nsetup(\n    name=\"locust\",\n    version=version,\n    install_requires=[\n        \"gevent>=20.9.0\",\n        \"flask==1.1.2\",\n        \"Werkzeug>=1.0.1\",\n        \"requests>=2.9.1\",\n        \"msgpack>=0.6.2\",\n        \"pyzmq>=16.0.2\",\n        \"geventhttpclient>=1.4.4\",\n        \"ConfigArgParse>=1.0\",\n        \"psutil>=5.6.7\",\n        \"Flask-BasicAuth>=0.2.0\",\n    ],\n    test_suite=\"locust.test\",\n    tests_require=[\n        \"cryptography\",\n        \"mock\",\n        \"pyquery\",\n    ],\n    extras_require={\n        \":sys_platform == 'win32'\": [\"pywin32\"],\n    },\n)\n", "path": "setup.py"}]}