We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Release 1.4.7
docket of user-facing issues fixed:
+ #550: Pex 1.4.6 builds a failing pex

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `pex/version.py`
Content:
```
1 # Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).
2 # Licensed under the Apache License, Version 2.0 (see LICENSE).
3 
4 __version__ = '1.4.6'
5 
6 # Versions 34.0.0 through 35.0.2 (last pre-36.0.0) de-vendored dependencies which causes problems
7 # for pex code so we exclude that range.
8 SETUPTOOLS_REQUIREMENT = 'setuptools>=20.3,<41,!=34.*,!=35.*'
9 
10 WHEEL_REQUIREMENT = 'wheel>=0.26.0,<0.32'
11
```

Path: `setup.py`
Content:
```
1 # Copyright 2014 Pants project contributors (see CONTRIBUTORS.md).
2 # Licensed under the Apache License, Version 2.0 (see LICENSE).
3 
4 import os
5 
6 from setuptools import setup
7 
8 with open(os.path.join(os.path.dirname(__file__), 'README.rst')) as fp:
9   LONG_DESCRIPTION = fp.read() + '\n'
10 
11 with open(os.path.join(os.path.dirname(__file__), 'CHANGES.rst')) as fp:
12   LONG_DESCRIPTION += fp.read()
13 
14 
15 # This seems to be a fairly standard version file pattern.
16 #
17 # Populates the following variables:
18 #   __version__
19 #   __setuptools_requirement
20 #   __wheel_requirement
21 __version__ = ''
22 version_py_file = os.path.join(os.path.dirname(__file__), 'pex', 'version.py')
23 with open(version_py_file) as version_py:
24   exec(compile(version_py.read(), version_py_file, 'exec'))
25 
26 
27 setup(
28   name = 'pex',
29   version = __version__,
30   description = "The PEX packaging toolchain.",
31   long_description = LONG_DESCRIPTION,
32   url = 'https://github.com/pantsbuild/pex',
33   license = 'Apache License, Version 2.0',
34   zip_safe = True,
35   classifiers = [
36     'Intended Audience :: Developers',
37     'License :: OSI Approved :: Apache Software License',
38     'Operating System :: Unix',
39     'Operating System :: POSIX :: Linux',
40     'Operating System :: MacOS :: MacOS X',
41     'Programming Language :: Python',
42     'Programming Language :: Python :: 2',
43     'Programming Language :: Python :: 2.7',
44     'Programming Language :: Python :: 3',
45     'Programming Language :: Python :: 3.3',
46     'Programming Language :: Python :: 3.4',
47     'Programming Language :: Python :: 3.5',
48     'Programming Language :: Python :: 3.6',
49   ],
50   packages = [
51     'pex',
52     'pex.bin',
53     'pex.commands',
54   ],
55   install_requires = [
56     SETUPTOOLS_REQUIREMENT,
57     WHEEL_REQUIREMENT,
58   ],
59   extras_require={
60     # For improved subprocess robustness under python2.7.
61     'subprocess': ['subprocess32>=3.2.7'],
62     # For improved requirement resolution and fetching robustness.
63     'requests': ['requests>=2.8.14'],
64     # For improved requirement resolution and fetching performance.
65     'cachecontrol': ['CacheControl>=0.12.3'],
66   },
67   tests_require = [
68     'mock',
69     'twitter.common.contextutil>=0.3.1,<0.4.0',
70     'twitter.common.lang>=0.3.1,<0.4.0',
71     'twitter.common.testing>=0.3.1,<0.4.0',
72     'twitter.common.dirutil>=0.3.1,<0.4.0',
73     'pytest',
74   ],
75   entry_points = {
76     'distutils.commands': [
77       'bdist_pex = pex.commands.bdist_pex:bdist_pex',
78     ],
79     'console_scripts': [
80       'pex = pex.bin.pex:main',
81     ],
82   },
83 )
84
```
--- 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()

```

diff --git a/pex/version.py b/pex/version.py
--- a/pex/version.py
+++ b/pex/version.py
@@ -1,7 +1,7 @@
 # Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
-__version__ = '1.4.6'
+__version__ = '1.4.7'
 
 # Versions 34.0.0 through 35.0.2 (last pre-36.0.0) de-vendored dependencies which causes problems
 # for pex code so we exclude that range.
diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,7 @@
   version = __version__,
   description = "The PEX packaging toolchain.",
   long_description = LONG_DESCRIPTION,
+  long_description_content_type="text/x-rst",
   url = 'https://github.com/pantsbuild/pex',
   license = 'Apache License, Version 2.0',
   zip_safe = True,

{"golden_diff": "diff --git a/pex/version.py b/pex/version.py\n--- a/pex/version.py\n+++ b/pex/version.py\n@@ -1,7 +1,7 @@\n # Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).\n # Licensed under the Apache License, Version 2.0 (see LICENSE).\n \n-__version__ = '1.4.6'\n+__version__ = '1.4.7'\n \n # Versions 34.0.0 through 35.0.2 (last pre-36.0.0) de-vendored dependencies which causes problems\n # for pex code so we exclude that range.\ndiff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -29,6 +29,7 @@\n   version = __version__,\n   description = \"The PEX packaging toolchain.\",\n   long_description = LONG_DESCRIPTION,\n+  long_description_content_type=\"text/x-rst\",\n   url = 'https://github.com/pantsbuild/pex',\n   license = 'Apache License, Version 2.0',\n   zip_safe = True,\n", "issue": "Release 1.4.7\ndocket of user-facing issues fixed:\r\n+ #550: Pex 1.4.6 builds a failing pex\n", "before_files": [{"content": "# Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).\n# Licensed under the Apache License, Version 2.0 (see LICENSE).\n\n__version__ = '1.4.6'\n\n# Versions 34.0.0 through 35.0.2 (last pre-36.0.0) de-vendored dependencies which causes problems\n# for pex code so we exclude that range.\nSETUPTOOLS_REQUIREMENT = 'setuptools>=20.3,<41,!=34.*,!=35.*'\n\nWHEEL_REQUIREMENT = 'wheel>=0.26.0,<0.32'\n", "path": "pex/version.py"}, {"content": "# Copyright 2014 Pants project contributors (see CONTRIBUTORS.md).\n# Licensed under the Apache License, Version 2.0 (see LICENSE).\n\nimport os\n\nfrom setuptools import setup\n\nwith open(os.path.join(os.path.dirname(__file__), 'README.rst')) as fp:\n  LONG_DESCRIPTION = fp.read() + '\\n'\n\nwith open(os.path.join(os.path.dirname(__file__), 'CHANGES.rst')) as fp:\n  LONG_DESCRIPTION += fp.read()\n\n\n# This seems to be a fairly standard version file pattern.\n#\n# Populates the following variables:\n#   __version__\n#   __setuptools_requirement\n#   __wheel_requirement\n__version__ = ''\nversion_py_file = os.path.join(os.path.dirname(__file__), 'pex', 'version.py')\nwith open(version_py_file) as version_py:\n  exec(compile(version_py.read(), version_py_file, 'exec'))\n\n\nsetup(\n  name = 'pex',\n  version = __version__,\n  description = \"The PEX packaging toolchain.\",\n  long_description = LONG_DESCRIPTION,\n  url = 'https://github.com/pantsbuild/pex',\n  license = 'Apache License, Version 2.0',\n  zip_safe = True,\n  classifiers = [\n    'Intended Audience :: Developers',\n    'License :: OSI Approved :: Apache Software License',\n    'Operating System :: Unix',\n    'Operating System :: POSIX :: Linux',\n    'Operating System :: MacOS :: MacOS X',\n    'Programming Language :: Python',\n    'Programming Language :: Python :: 2',\n    'Programming Language :: Python :: 2.7',\n    'Programming Language :: Python :: 3',\n    'Programming Language :: Python :: 3.3',\n    'Programming Language :: Python :: 3.4',\n    'Programming Language :: Python :: 3.5',\n    'Programming Language :: Python :: 3.6',\n  ],\n  packages = [\n    'pex',\n    'pex.bin',\n    'pex.commands',\n  ],\n  install_requires = [\n    SETUPTOOLS_REQUIREMENT,\n    WHEEL_REQUIREMENT,\n  ],\n  extras_require={\n    # For improved subprocess robustness under python2.7.\n    'subprocess': ['subprocess32>=3.2.7'],\n    # For improved requirement resolution and fetching robustness.\n    'requests': ['requests>=2.8.14'],\n    # For improved requirement resolution and fetching performance.\n    'cachecontrol': ['CacheControl>=0.12.3'],\n  },\n  tests_require = [\n    'mock',\n    'twitter.common.contextutil>=0.3.1,<0.4.0',\n    'twitter.common.lang>=0.3.1,<0.4.0',\n    'twitter.common.testing>=0.3.1,<0.4.0',\n    'twitter.common.dirutil>=0.3.1,<0.4.0',\n    'pytest',\n  ],\n  entry_points = {\n    'distutils.commands': [\n      'bdist_pex = pex.commands.bdist_pex:bdist_pex',\n    ],\n    'console_scripts': [\n      'pex = pex.bin.pex:main',\n    ],\n  },\n)\n", "path": "setup.py"}], "after_files": [{"content": "# Copyright 2015 Pants project contributors (see CONTRIBUTORS.md).\n# Licensed under the Apache License, Version 2.0 (see LICENSE).\n\n__version__ = '1.4.7'\n\n# Versions 34.0.0 through 35.0.2 (last pre-36.0.0) de-vendored dependencies which causes problems\n# for pex code so we exclude that range.\nSETUPTOOLS_REQUIREMENT = 'setuptools>=20.3,<41,!=34.*,!=35.*'\n\nWHEEL_REQUIREMENT = 'wheel>=0.26.0,<0.32'\n", "path": "pex/version.py"}, {"content": "# Copyright 2014 Pants project contributors (see CONTRIBUTORS.md).\n# Licensed under the Apache License, Version 2.0 (see LICENSE).\n\nimport os\n\nfrom setuptools import setup\n\nwith open(os.path.join(os.path.dirname(__file__), 'README.rst')) as fp:\n  LONG_DESCRIPTION = fp.read() + '\\n'\n\nwith open(os.path.join(os.path.dirname(__file__), 'CHANGES.rst')) as fp:\n  LONG_DESCRIPTION += fp.read()\n\n\n# This seems to be a fairly standard version file pattern.\n#\n# Populates the following variables:\n#   __version__\n#   __setuptools_requirement\n#   __wheel_requirement\n__version__ = ''\nversion_py_file = os.path.join(os.path.dirname(__file__), 'pex', 'version.py')\nwith open(version_py_file) as version_py:\n  exec(compile(version_py.read(), version_py_file, 'exec'))\n\n\nsetup(\n  name = 'pex',\n  version = __version__,\n  description = \"The PEX packaging toolchain.\",\n  long_description = LONG_DESCRIPTION,\n  long_description_content_type=\"text/x-rst\",\n  url = 'https://github.com/pantsbuild/pex',\n  license = 'Apache License, Version 2.0',\n  zip_safe = True,\n  classifiers = [\n    'Intended Audience :: Developers',\n    'License :: OSI Approved :: Apache Software License',\n    'Operating System :: Unix',\n    'Operating System :: POSIX :: Linux',\n    'Operating System :: MacOS :: MacOS X',\n    'Programming Language :: Python',\n    'Programming Language :: Python :: 2',\n    'Programming Language :: Python :: 2.7',\n    'Programming Language :: Python :: 3',\n    'Programming Language :: Python :: 3.3',\n    'Programming Language :: Python :: 3.4',\n    'Programming Language :: Python :: 3.5',\n    'Programming Language :: Python :: 3.6',\n  ],\n  packages = [\n    'pex',\n    'pex.bin',\n    'pex.commands',\n  ],\n  install_requires = [\n    SETUPTOOLS_REQUIREMENT,\n    WHEEL_REQUIREMENT,\n  ],\n  extras_require={\n    # For improved subprocess robustness under python2.7.\n    'subprocess': ['subprocess32>=3.2.7'],\n    # For improved requirement resolution and fetching robustness.\n    'requests': ['requests>=2.8.14'],\n    # For improved requirement resolution and fetching performance.\n    'cachecontrol': ['CacheControl>=0.12.3'],\n  },\n  tests_require = [\n    'mock',\n    'twitter.common.contextutil>=0.3.1,<0.4.0',\n    'twitter.common.lang>=0.3.1,<0.4.0',\n    'twitter.common.testing>=0.3.1,<0.4.0',\n    'twitter.common.dirutil>=0.3.1,<0.4.0',\n    'pytest',\n  ],\n  entry_points = {\n    'distutils.commands': [\n      'bdist_pex = pex.commands.bdist_pex:bdist_pex',\n    ],\n    'console_scripts': [\n      'pex = pex.bin.pex:main',\n    ],\n  },\n)\n", "path": "setup.py"}]}