spyder 5.4.4+ds-1 autopkgtest fails

[Benjamin Drung]

The autopkgtest for spyder 5.4.4+ds-1 fails:

```
=================================== FAILURES ===================================
_____________________ test_get_user_environment_variables ______________________

    def test_get_user_environment_variables():
        """Test get_user_environment_variables function"""
        # All platforms should have a path environment variable, but
        # Windows may have mixed case.
        keys = {k.lower() for k in get_user_environment_variables()}
> assert "path" in keys
E AssertionError: assert 'path' in {'_', 'debuginfod_urls', 'home', 'lc_ctype', 'pwd', 'shlvl'}

spyder/utils/tests/test_environ.py:42: AssertionError
_________________________________ test_environ _________________________________

environ_dialog = <spyder.utils.environ.UserEnvDialog object at 0x7ff4e3e3b400>
qtbot = <pytestqt.qtbot.QtBot object at 0x7ff4e39caad0>

    def test_environ(environ_dialog, qtbot):
        """Test the environment variables dialog."""
        environ_dialog.show()
        assert environ_dialog

        # All platforms should have a path environment variable, but
        # Windows may have mixed case.
        keys = {k.lower() for k in environ_dialog.get_value()}
> assert "path" in keys
E AssertionError: assert 'path' in {'_', 'debuginfod_urls', 'home', 'lc_ctype', 'pwd', 'shlvl'}

spyder/utils/tests/test_environ.py:64: AssertionError
=============================== warnings summary ===============================
```

Running `env` before the test is executed in the autopkgtest shows that `PATH` is set:

```
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
```

But running something similar to the spyder code does not contain the PATH variable:

```
$ env -i bash -l -c env | sort
DEBUGINFOD_URLS=https://debuginfod.ubuntu.com
PWD=/tmp/autopkgtest.wq0cE8/build.3Mr/real-tree
SHLVL=0
_=/bin/env
```

[Benjamin Drung (bdrung)]

The current upstream master approach seems to work (tested in schroot):

```
$ cat user-env.sh
#!/bin/bash -i
unset HISTFILE
#/bin/bash -l -c "/usr/bin/python3 -c 'import os; print(dict(os.environ))'"
/bin/bash -l -c env | grep PATH
$ ./user-env.sh
PATH=/usr/local/bin:/usr/bin:/bin
```

[Benjamin Drung (bdrung)]

Correction: The user-env.sh script does not work inside a schroot when running with an empty environment:

```
$ schroot-wrapper -p python3,vim -c mantic
$ cat user-env.sh
#!/bin/bash -i
unset HISTFILE
/bin/bash -l -c "/usr/bin/python3 -c 'import os; print(dict(os.environ))'"
$ env -i ./user-env.sh
{'PWD': '/home/myuser', 'SHLVL': '1', '_': '/usr/bin/python3', 'LC_CTYPE': 'C.UTF-8'}
```

[Benjamin Drung (bdrung)]

Reported upstream: https://github.com/spyder-ide/spyder/issues/21297

[Jose Luis Rivero (j-rivero)]

Upstream fix was merged and released in 5.5.0. Noble is shipping this patch.

[Benjamin Drung (bdrung)]

The spyder 5.5.1+ds-1 autopkgtest on amd64 is succeeding.