[Bug 1655220] [NEW] Test failure: test_venv

[Anthony Sottile]

Public bug reported:

```
$ python3.5 -m test test_venv
[1/1] test_venv
test test_venv failed -- Traceback (most recent call last):
  File "/usr/lib/python3.5/test/test_venv.py", line 407, in test_with_pip
    self.assertEqual(err.rstrip(), "")
AssertionError: 'Traceback (most recent call last):\n  Fil[597 chars]list' != ''
- Traceback (most recent call last):
-   File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
-     "__main__", mod_spec)
-   File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
-     exec(code, run_globals)
-   File "/usr/lib/python3.5/ensurepip/_uninstall.py", line 30, in <module>
-     _main()
-   File "/usr/lib/python3.5/ensurepip/_uninstall.py", line 26, in _main
-     ensurepip._uninstall_helper(verbosity=args.verbosity)
-   File "/usr/lib/python3.5/ensurepip/__init__.py", line 203, in _uninstall_helper
-     _run_pip(args + reversed(_PROJECTS))
- TypeError: can only concatenate list (not "list_reverseiterator") to list

1 test failed:
    test_venv
```

The debian patch here is buggy (even in python2) as reversed returns an
iterator.  A patch to the patch which fixes this:

```diff
diff --git a/debian/patches/ensurepip-wheels.diff b/debian/patches/ensurepip-wheels.diff
index df5de92..858feb0 100644
--- a/debian/patches/ensurepip-wheels.diff
+++ b/debian/patches/ensurepip-wheels.diff
@@ -115,7 +115,7 @@ Index: b/Lib/ensurepip/__init__.py
          args += ["-" + "v" * verbosity]
  
 -    _run_pip(args + [p[0] for p in reversed(_PROJECTS)])
-+    _run_pip(args + reversed(_PROJECTS))
++    _run_pip(args + list(reversed(_PROJECTS)))
  
  
  def _main(argv=None):
```

```
$ lsb_release -rd
Description:	Ubuntu 16.04.1 LTS
Release:	16.04
$ apt-cache policy python3.5
python3.5:
  Installed: 3.5.2-2ubuntu0~16.04.1
  Candidate: 3.5.2-2ubuntu0~16.04.1
  Version table:
 *** 3.5.2-2ubuntu0~16.04.1 500
        500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
        100 /var/lib/dpkg/status
     3.5.1-10 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
```

** Affects: python3.5 (Ubuntu)
     Importance: Undecided
         Status: New

-- 
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https://bugs.launchpad.net/bugs/1655220

Title:
  Test failure: test_venv

Status in python3.5 package in Ubuntu:
  New

Bug description:
  ```
  $ python3.5 -m test test_venv
  [1/1] test_venv
  test test_venv failed -- Traceback (most recent call last):
    File "/usr/lib/python3.5/test/test_venv.py", line 407, in test_with_pip
      self.assertEqual(err.rstrip(), "")
  AssertionError: 'Traceback (most recent call last):\n  Fil[597 chars]list' != ''
  - Traceback (most recent call last):
  -   File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
  -     "__main__", mod_spec)
  -   File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
  -     exec(code, run_globals)
  -   File "/usr/lib/python3.5/ensurepip/_uninstall.py", line 30, in <module>
  -     _main()
  -   File "/usr/lib/python3.5/ensurepip/_uninstall.py", line 26, in _main
  -     ensurepip._uninstall_helper(verbosity=args.verbosity)
  -   File "/usr/lib/python3.5/ensurepip/__init__.py", line 203, in _uninstall_helper
  -     _run_pip(args + reversed(_PROJECTS))
  - TypeError: can only concatenate list (not "list_reverseiterator") to list

  1 test failed:
      test_venv
  ```

  The debian patch here is buggy (even in python2) as reversed returns
  an iterator.  A patch to the patch which fixes this:

  ```diff
  diff --git a/debian/patches/ensurepip-wheels.diff b/debian/patches/ensurepip-wheels.diff
  index df5de92..858feb0 100644
  --- a/debian/patches/ensurepip-wheels.diff
  +++ b/debian/patches/ensurepip-wheels.diff
  @@ -115,7 +115,7 @@ Index: b/Lib/ensurepip/__init__.py
            args += ["-" + "v" * verbosity]
    
   -    _run_pip(args + [p[0] for p in reversed(_PROJECTS)])
  -+    _run_pip(args + reversed(_PROJECTS))
  ++    _run_pip(args + list(reversed(_PROJECTS)))
    
    
    def _main(argv=None):
  ```

  ```
  $ lsb_release -rd
  Description:	Ubuntu 16.04.1 LTS
  Release:	16.04
  $ apt-cache policy python3.5
  python3.5:
    Installed: 3.5.2-2ubuntu0~16.04.1
    Candidate: 3.5.2-2ubuntu0~16.04.1
    Version table:
   *** 3.5.2-2ubuntu0~16.04.1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
          100 /var/lib/dpkg/status
       3.5.1-10 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
  ```

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