text: Title: Regression in environment var inheritance in tox 4
  Body: ## Issue
  
  I'm not sure if this is a regression, or if I am using a bad pattern that worked by chance in tox3.
  
  I use the base [testenv] to set_env some vars and run unit tests.  Then I have a [testenv:functional] that inherits these env vars (most of which are still relevant) but changes the var governing where the tests are located.  I use that as an "abstract" testenv to hold the setenv, commands, etc., for python-version-specific testenvs like [testenv:functional-py39], [testenv:functional-py310], etc.   In tox3 this worked great, but in tox 4, the changes to set_env in the "abstract" testenv aren't picked up when I call 'tox -e functional-py39'.
  
  Here's a ``tox.ini`` for this that works in both tox3 and tox4.
  
  ```ini
  [tox]
  envlist = py39,functional-py39
  skipsdist=true
  
  [testenv]
  setenv =
      OS_TEST_PATH=./cinderclient/tests/unit
  allowlist_externals = bash
  commands = bash ts.sh testenv
  
  # abstract env
  [testenv:functional]
  setenv =
    {[testenv]setenv}
    OS_TEST_PATH=./cinderclient/tests/functional
  commands = bash ts.sh functional
  
  # python-version-specific env
  [testenv:functional-py39]
  setenv = {[testenv:functional]setenv}
  commands = {[testenv:functional]commands}
  ```
  
  All ``ts.sh`` does is echo the value of the env var of interest to a file:
  
  ```bash
  #!/bin/bash
  
  echo "$1: $OS_TEST_PATH" >> tmpfile
  ```
  Using the ``tox.ini`` with both tox3 and tox4:
  
  ```console
  ❯  ./tox4 --version >> tmpfile
  ❯ ./tox4
  py39: commands[0]> bash ts.sh testenv
  py39: OK ✔ in 0.06 seconds
  functional-py39: commands[0]> bash ts.sh functional
    py39: OK (0.06=setup[0.06]+cmd[0.00] seconds)
    functional-py39: OK (0.05=setup[0.05]+cmd[0.00] seconds)
    congratulations :) (0.14 seconds)
  ❯ tox --version >> tmpfile
  ❯ tox
  py39 create: /home/brosmait/scratch/lang/python/tox/.tox/py39
  py39 run-test-pre: PYTHONHASHSEED='2285170242'
  py39 run-test: commands[0] | bash ts.sh testenv
  functional-py39 create: /home/brosmait/scratch/lang/python/tox/.tox/functional-py39
  functional-py39 run-test-pre: PYTHONHASHSEED='2285170242'
  functional-py39 run-test: commands[0] | bash ts.sh functional
  ____________________________________________________________ summary _____________________________________________________________
    py39: commands succeeded
    functional-py39: commands succeeded
    congratulations :)
  ```
  Looking at the created file:
  ```console
  ❯ cat tmpfile
  4.2.5 from /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/tox/__init__.py
  testenv: ./cinderclient/tests/unit
  functional: ./cinderclient/tests/unit
  3.28.0 imported from /usr/lib/python3.10/site-packages/tox/__init__.py
  testenv: ./cinderclient/tests/unit
  functional: ./cinderclient/tests/functional
  ```
  
  You can see that tox3 uses the correct value for the env var for the functional tests, but tox4 is using the original value.
  
  ## Environment
  
  Provide at least:
  
  - OS: Fedora release 36
  - `pip list` of the host Python where `tox` is installed:
  
  ```console
  ❯ pip list
  Package       Version
  ------------- -------
  cachetools    5.2.0
  chardet       5.1.0
  colorama      0.4.6
  distlib       0.3.6
  filelock      3.9.0
  packaging     22.0
  pip           22.3.1
  platformdirs  2.6.2
  pluggy        1.0.0
  pyproject_api 1.4.0
  setuptools    65.6.3
  tomli         2.0.1
  tox           4.2.5
  virtualenv    20.17.1
  wheel         0.38.4
  ```
  
  ## Output of running tox
  
  Provide the output of `tox -rvv`:
  
  ```console
  ❯  ./tox4 -rvv
  py39: 83 W remove tox env folder /home/brosmait/scratch/lang/python/tox/.tox/py39 [tox/tox_env/api.py:321]
  py39: 103 I find interpreter for spec PythonSpec(major=3, minor=9) [virtualenv/discovery/builtin.py:56]
  py39: 103 D discover exe for PythonInfo(spec=CPython3.10.9.final.0-64, exe=/home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/bin/python, platform=linux, version='3.10.9 (main, Dec  7 2022, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]', encoding_fs_io=utf-8-utf-8) in /usr [virtualenv/discovery/py_info.py:437]
  py39: 103 D filesystem is case-sensitive [virtualenv/info.py:24]
  py39: 103 D got python info of /usr/bin/python3.10 from /home/brosmait/.local/share/virtualenv/py_info/1/8a94588eda9d64d9e9a351ab8144e55b1fabf5113b54e67dd26a8c27df0381b3.json [virtualenv/app_data/via_disk_folder.py:129]
  py39: 104 I proposed PythonInfo(spec=CPython3.10.9.final.0-64, system=/usr/bin/python3.10, exe=/home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/bin/python, platform=linux, version='3.10.9 (main, Dec  7 2022, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]', encoding_fs_io=utf-8-utf-8) [virtualenv/discovery/builtin.py:63]
  py39: 104 D discover PATH[0]=/home/brosmait/.pyenv/plugins/pyenv-virtualenv/shims [virtualenv/discovery/builtin.py:108]
  py39: 104 D discover PATH[1]=/home/brosmait/.pyenv/shims [virtualenv/discovery/builtin.py:108]
  py39: 104 D got python info of /home/brosmait/.pyenv/shims/python3.9 from /home/brosmait/.local/share/virtualenv/py_info/1/df5750520713fe69cbf62cb311668a6a03aa778e2b7543129d2ab17ce2716c13.json [virtualenv/app_data/via_disk_folder.py:129]
  py39: 105 D got python info of /home/brosmait/.pyenv/versions/3.9.14/bin/python3.9 from /home/brosmait/.local/share/virtualenv/py_info/1/e9b605bd999ef794c335c758558757307e733b618c62dd3ca2fa6d9c79695fff.json [virtualenv/app_data/via_disk_folder.py:129]
  py39: 105 I proposed PathPythonInfo(spec=CPython3.9.14.final.0-64, system=/home/brosmait/.pyenv/versions/3.9.14/bin/python3.9, exe=/home/brosmait/.pyenv/shims/python3.9, platform=linux, version='3.9.14 (main, Oct  4 2022, 17:06:42) \n[GCC 12.2.1 20220819 (Red Hat 12.2.1-2)]', encoding_fs_io=utf-8-utf-8) [virtualenv/discovery/builtin.py:63]
  py39: 105 D accepted PathPythonInfo(spec=CPython3.9.14.final.0-64, system=/home/brosmait/.pyenv/versions/3.9.14/bin/python3.9, exe=/home/brosmait/.pyenv/shims/python3.9, platform=linux, version='3.9.14 (main, Oct  4 2022, 17:06:42) \n[GCC 12.2.1 20220819 (Red Hat 12.2.1-2)]', encoding_fs_io=utf-8-utf-8) [virtualenv/discovery/builtin.py:65]
  py39: 120 I create virtual environment via CPython3Posix(dest=/home/brosmait/scratch/lang/python/tox/.tox/py39, clear=False, no_vcs_ignore=False, global=False) [virtualenv/run/session.py:48]
  py39: 120 D create folder /home/brosmait/scratch/lang/python/tox/.tox/py39/bin [virtualenv/util/path/_sync.py:9]
  py39: 120 D create folder /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages [virtualenv/util/path/_sync.py:9]
  py39: 120 D write /home/brosmait/scratch/lang/python/tox/.tox/py39/pyvenv.cfg [virtualenv/create/pyenv_cfg.py:30]
  py39: 120 D 	home = /home/brosmait/.pyenv/versions/3.9.14/bin [virtualenv/create/pyenv_cfg.py:34]
  py39: 120 D 	implementation = CPython [virtualenv/create/pyenv_cfg.py:34]
  py39: 120 D 	version_info = 3.9.14.final.0 [virtualenv/create/pyenv_cfg.py:34]
  py39: 120 D 	virtualenv = 20.17.1 [virtualenv/create/pyenv_cfg.py:34]
  py39: 120 D 	include-system-site-packages = false [virtualenv/create/pyenv_cfg.py:34]
  py39: 120 D 	base-prefix = /home/brosmait/.pyenv/versions/3.9.14 [virtualenv/create/pyenv_cfg.py:34]
  py39: 120 D 	base-exec-prefix = /home/brosmait/.pyenv/versions/3.9.14 [virtualenv/create/pyenv_cfg.py:34]
  py39: 120 D 	base-executable = /home/brosmait/.pyenv/versions/3.9.14/bin/python3.9 [virtualenv/create/pyenv_cfg.py:34]
  py39: 120 D symlink /home/brosmait/.pyenv/versions/3.9.14/bin/python3.9 to /home/brosmait/scratch/lang/python/tox/.tox/py39/bin/python [virtualenv/util/path/_sync.py:28]
  py39: 121 D create virtualenv import hook file /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/_virtualenv.pth [virtualenv/create/via_global_ref/api.py:89]
  py39: 121 D create /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/_virtualenv.py [virtualenv/create/via_global_ref/api.py:92]
  py39: 121 D ============================== target debug ============================== [virtualenv/run/session.py:50]
  py39: 121 D debug via /home/brosmait/scratch/lang/python/tox/.tox/py39/bin/python /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/virtualenv/create/debug.py [virtualenv/create/creator.py:197]
  py39: 121 D {
    "sys": {
      "executable": "/home/brosmait/scratch/lang/python/tox/.tox/py39/bin/python",
      "_base_executable": "/home/brosmait/scratch/lang/python/tox/.tox/py39/bin/python",
      "prefix": "/home/brosmait/scratch/lang/python/tox/.tox/py39",
      "base_prefix": "/home/brosmait/.pyenv/versions/3.9.14",
      "real_prefix": null,
      "exec_prefix": "/home/brosmait/scratch/lang/python/tox/.tox/py39",
      "base_exec_prefix": "/home/brosmait/.pyenv/versions/3.9.14",
      "path": [
        "/home/brosmait/.pyenv/versions/3.9.14/lib/python39.zip",
        "/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9",
        "/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/lib-dynload",
        "/home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages"
      ],
      "meta_path": [
        "<class '_virtualenv._Finder'>",
        "<class '_frozen_importlib.BuiltinImporter'>",
        "<class '_frozen_importlib.FrozenImporter'>",
        "<class '_frozen_importlib_external.PathFinder'>"
      ],
      "fs_encoding": "utf-8",
      "io_encoding": "utf-8"
    },
    "version": "3.9.14 (main, Oct  4 2022, 17:06:42) \n[GCC 12.2.1 20220819 (Red Hat 12.2.1-2)]",
    "makefile_filename": "/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/config-3.9-x86_64-linux-gnu/Makefile",
    "os": "<module 'os' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/os.py'>",
    "site": "<module 'site' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/site.py'>",
    "datetime": "<module 'datetime' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/datetime.py'>",
    "math": "<module 'math' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/lib-dynload/math.cpython-39-x86_64-linux-gnu.so'>",
    "json": "<module 'json' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/json/__init__.py'>"
  } [virtualenv/run/session.py:51]
  py39: 136 I add seed packages via FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/brosmait/.local/share/virtualenv) [virtualenv/run/session.py:55]
  py39: 137 D install setuptools from wheel /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/virtualenv/seed/wheels/embed/setuptools-65.6.3-py3-none-any.whl via CopyPipInstall [virtualenv/seed/embed/via_app_data/via_app_data.py:47]
  py39: 137 D install pip from wheel /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/virtualenv/seed/wheels/embed/pip-22.3.1-py3-none-any.whl via CopyPipInstall [virtualenv/seed/embed/via_app_data/via_app_data.py:47]
  py39: 137 D install wheel from wheel /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/virtualenv/seed/wheels/embed/wheel-0.38.4-py3-none-any.whl via CopyPipInstall [virtualenv/seed/embed/via_app_data/via_app_data.py:47]
  py39: 138 D copy /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/distutils-precedence.pth to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/distutils-precedence.pth [virtualenv/util/path/_sync.py:36]
  py39: 138 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/wheel-0.38.4-py3-none-any/wheel to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/wheel [virtualenv/util/path/_sync.py:36]
  py39: 138 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/pip-22.3.1-py3-none-any/pip to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/pip [virtualenv/util/path/_sync.py:36]
  py39: 138 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/_distutils_hack to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/_distutils_hack [virtualenv/util/path/_sync.py:36]
  py39: 139 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/pkg_resources to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/pkg_resources [virtualenv/util/path/_sync.py:36]
  py39: 142 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/wheel-0.38.4-py3-none-any/wheel-0.38.4.dist-info to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/wheel-0.38.4.dist-info [virtualenv/util/path/_sync.py:36]
  py39: 143 D copy /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/wheel-0.38.4-py3-none-any/wheel-0.38.4.virtualenv to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/wheel-0.38.4.virtualenv [virtualenv/util/path/_sync.py:36]
  py39: 144 D generated console scripts wheel-3.9 wheel wheel3 wheel3.9 [virtualenv/seed/embed/via_app_data/pip_install/base.py:41]
  py39: 147 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/setuptools to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/setuptools [virtualenv/util/path/_sync.py:36]
  py39: 165 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/setuptools-65.6.3.dist-info to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/setuptools-65.6.3.dist-info [virtualenv/util/path/_sync.py:36]
  py39: 166 D copy /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/setuptools-65.6.3.virtualenv to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/setuptools-65.6.3.virtualenv [virtualenv/util/path/_sync.py:36]
  py39: 166 D generated console scripts  [virtualenv/seed/embed/via_app_data/pip_install/base.py:41]
  py39: 178 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/pip-22.3.1-py3-none-any/pip-22.3.1.dist-info to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/pip-22.3.1.dist-info [virtualenv/util/path/_sync.py:36]
  py39: 178 D copy /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/pip-22.3.1-py3-none-any/pip-22.3.1.virtualenv to /home/brosmait/scratch/lang/python/tox/.tox/py39/lib/python3.9/site-packages/pip-22.3.1.virtualenv [virtualenv/util/path/_sync.py:36]
  py39: 179 D generated console scripts pip3.9 pip pip-3.9 pip3 [virtualenv/seed/embed/via_app_data/pip_install/base.py:41]
  py39: 179 I add activators for Bash, CShell, Fish, Nushell, PowerShell, Python [virtualenv/run/session.py:61]
  py39: 180 D write /home/brosmait/scratch/lang/python/tox/.tox/py39/pyvenv.cfg [virtualenv/create/pyenv_cfg.py:30]
  py39: 180 D 	home = /home/brosmait/.pyenv/versions/3.9.14/bin [virtualenv/create/pyenv_cfg.py:34]
  py39: 180 D 	implementation = CPython [virtualenv/create/pyenv_cfg.py:34]
  py39: 180 D 	version_info = 3.9.14.final.0 [virtualenv/create/pyenv_cfg.py:34]
  py39: 180 D 	virtualenv = 20.17.1 [virtualenv/create/pyenv_cfg.py:34]
  py39: 180 D 	include-system-site-packages = false [virtualenv/create/pyenv_cfg.py:34]
  py39: 180 D 	base-prefix = /home/brosmait/.pyenv/versions/3.9.14 [virtualenv/create/pyenv_cfg.py:34]
  py39: 180 D 	base-exec-prefix = /home/brosmait/.pyenv/versions/3.9.14 [virtualenv/create/pyenv_cfg.py:34]
  py39: 180 D 	base-executable = /home/brosmait/.pyenv/versions/3.9.14/bin/python3.9 [virtualenv/create/pyenv_cfg.py:34]
  py39: 181 W commands[0]> bash ts.sh testenv [tox/tox_env/api.py:427]
  py39: 183 I exit 0 (0.00 seconds) /home/brosmait/scratch/lang/python/tox> bash ts.sh testenv pid=315709 [tox/execute/api.py:275]
  py39: OK ✔ in 0.1 seconds
  functional-py39: 183 W remove tox env folder /home/brosmait/scratch/lang/python/tox/.tox/functional-py39 [tox/tox_env/api.py:321]
  functional-py39: 201 I find interpreter for spec PythonSpec(major=3, minor=9) [virtualenv/discovery/builtin.py:56]
  functional-py39: 201 I proposed PythonInfo(spec=CPython3.10.9.final.0-64, system=/usr/bin/python3.10, exe=/home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/bin/python, platform=linux, version='3.10.9 (main, Dec  7 2022, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]', encoding_fs_io=utf-8-utf-8) [virtualenv/discovery/builtin.py:63]
  functional-py39: 201 D discover PATH[0]=/home/brosmait/.pyenv/plugins/pyenv-virtualenv/shims [virtualenv/discovery/builtin.py:108]
  functional-py39: 202 D discover PATH[1]=/home/brosmait/.pyenv/shims [virtualenv/discovery/builtin.py:108]
  functional-py39: 202 I proposed PathPythonInfo(spec=CPython3.9.14.final.0-64, system=/home/brosmait/.pyenv/versions/3.9.14/bin/python3.9, exe=/home/brosmait/.pyenv/shims/python3.9, platform=linux, version='3.9.14 (main, Oct  4 2022, 17:06:42) \n[GCC 12.2.1 20220819 (Red Hat 12.2.1-2)]', encoding_fs_io=utf-8-utf-8) [virtualenv/discovery/builtin.py:63]
  functional-py39: 202 D accepted PathPythonInfo(spec=CPython3.9.14.final.0-64, system=/home/brosmait/.pyenv/versions/3.9.14/bin/python3.9, exe=/home/brosmait/.pyenv/shims/python3.9, platform=linux, version='3.9.14 (main, Oct  4 2022, 17:06:42) \n[GCC 12.2.1 20220819 (Red Hat 12.2.1-2)]', encoding_fs_io=utf-8-utf-8) [virtualenv/discovery/builtin.py:65]
  functional-py39: 202 I create virtual environment via CPython3Posix(dest=/home/brosmait/scratch/lang/python/tox/.tox/functional-py39, clear=False, no_vcs_ignore=False, global=False) [virtualenv/run/session.py:48]
  functional-py39: 203 D create folder /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/bin [virtualenv/util/path/_sync.py:9]
  functional-py39: 203 D create folder /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages [virtualenv/util/path/_sync.py:9]
  functional-py39: 203 D write /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/pyvenv.cfg [virtualenv/create/pyenv_cfg.py:30]
  functional-py39: 203 D 	home = /home/brosmait/.pyenv/versions/3.9.14/bin [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 203 D 	implementation = CPython [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 203 D 	version_info = 3.9.14.final.0 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 203 D 	virtualenv = 20.17.1 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 203 D 	include-system-site-packages = false [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 203 D 	base-prefix = /home/brosmait/.pyenv/versions/3.9.14 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 203 D 	base-exec-prefix = /home/brosmait/.pyenv/versions/3.9.14 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 203 D 	base-executable = /home/brosmait/.pyenv/versions/3.9.14/bin/python3.9 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 203 D symlink /home/brosmait/.pyenv/versions/3.9.14/bin/python3.9 to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/bin/python [virtualenv/util/path/_sync.py:28]
  functional-py39: 203 D create virtualenv import hook file /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/_virtualenv.pth [virtualenv/create/via_global_ref/api.py:89]
  functional-py39: 203 D create /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/_virtualenv.py [virtualenv/create/via_global_ref/api.py:92]
  functional-py39: 203 D ============================== target debug ============================== [virtualenv/run/session.py:50]
  functional-py39: 203 D debug via /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/bin/python /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/virtualenv/create/debug.py [virtualenv/create/creator.py:197]
  functional-py39: 203 D {
    "sys": {
      "executable": "/home/brosmait/scratch/lang/python/tox/.tox/functional-py39/bin/python",
      "_base_executable": "/home/brosmait/scratch/lang/python/tox/.tox/functional-py39/bin/python",
      "prefix": "/home/brosmait/scratch/lang/python/tox/.tox/functional-py39",
      "base_prefix": "/home/brosmait/.pyenv/versions/3.9.14",
      "real_prefix": null,
      "exec_prefix": "/home/brosmait/scratch/lang/python/tox/.tox/functional-py39",
      "base_exec_prefix": "/home/brosmait/.pyenv/versions/3.9.14",
      "path": [
        "/home/brosmait/.pyenv/versions/3.9.14/lib/python39.zip",
        "/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9",
        "/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/lib-dynload",
        "/home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages"
      ],
      "meta_path": [
        "<class '_virtualenv._Finder'>",
        "<class '_frozen_importlib.BuiltinImporter'>",
        "<class '_frozen_importlib.FrozenImporter'>",
        "<class '_frozen_importlib_external.PathFinder'>"
      ],
      "fs_encoding": "utf-8",
      "io_encoding": "utf-8"
    },
    "version": "3.9.14 (main, Oct  4 2022, 17:06:42) \n[GCC 12.2.1 20220819 (Red Hat 12.2.1-2)]",
    "makefile_filename": "/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/config-3.9-x86_64-linux-gnu/Makefile",
    "os": "<module 'os' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/os.py'>",
    "site": "<module 'site' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/site.py'>",
    "datetime": "<module 'datetime' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/datetime.py'>",
    "math": "<module 'math' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/lib-dynload/math.cpython-39-x86_64-linux-gnu.so'>",
    "json": "<module 'json' from '/home/brosmait/.pyenv/versions/3.9.14/lib/python3.9/json/__init__.py'>"
  } [virtualenv/run/session.py:51]
  functional-py39: 219 I add seed packages via FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/brosmait/.local/share/virtualenv) [virtualenv/run/session.py:55]
  functional-py39: 220 D install pip from wheel /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/virtualenv/seed/wheels/embed/pip-22.3.1-py3-none-any.whl via CopyPipInstall [virtualenv/seed/embed/via_app_data/via_app_data.py:47]
  functional-py39: 220 D install setuptools from wheel /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/virtualenv/seed/wheels/embed/setuptools-65.6.3-py3-none-any.whl via CopyPipInstall [virtualenv/seed/embed/via_app_data/via_app_data.py:47]
  functional-py39: 220 D install wheel from wheel /home/brosmait/repos/openstack/python-cinderclient/.tox/.tox/lib/python3.10/site-packages/virtualenv/seed/wheels/embed/wheel-0.38.4-py3-none-any.whl via CopyPipInstall [virtualenv/seed/embed/via_app_data/via_app_data.py:47]
  functional-py39: 221 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/wheel-0.38.4-py3-none-any/wheel to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/wheel [virtualenv/util/path/_sync.py:36]
  functional-py39: 221 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/pip-22.3.1-py3-none-any/pip to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/pip [virtualenv/util/path/_sync.py:36]
  functional-py39: 221 D copy /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/distutils-precedence.pth to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/distutils-precedence.pth [virtualenv/util/path/_sync.py:36]
  functional-py39: 222 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/_distutils_hack to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/_distutils_hack [virtualenv/util/path/_sync.py:36]
  functional-py39: 222 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/pkg_resources to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/pkg_resources [virtualenv/util/path/_sync.py:36]
  functional-py39: 224 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/wheel-0.38.4-py3-none-any/wheel-0.38.4.dist-info to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/wheel-0.38.4.dist-info [virtualenv/util/path/_sync.py:36]
  functional-py39: 226 D copy /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/wheel-0.38.4-py3-none-any/wheel-0.38.4.virtualenv to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/wheel-0.38.4.virtualenv [virtualenv/util/path/_sync.py:36]
  functional-py39: 227 D generated console scripts wheel-3.9 wheel wheel3 wheel3.9 [virtualenv/seed/embed/via_app_data/pip_install/base.py:41]
  functional-py39: 229 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/setuptools to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/setuptools [virtualenv/util/path/_sync.py:36]
  functional-py39: 249 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/setuptools-65.6.3.dist-info to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/setuptools-65.6.3.dist-info [virtualenv/util/path/_sync.py:36]
  functional-py39: 250 D copy /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/setuptools-65.6.3-py3-none-any/setuptools-65.6.3.virtualenv to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/setuptools-65.6.3.virtualenv [virtualenv/util/path/_sync.py:36]
  functional-py39: 250 D generated console scripts  [virtualenv/seed/embed/via_app_data/pip_install/base.py:41]
  functional-py39: 261 D copy directory /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/pip-22.3.1-py3-none-any/pip-22.3.1.dist-info to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/pip-22.3.1.dist-info [virtualenv/util/path/_sync.py:36]
  functional-py39: 262 D copy /home/brosmait/.local/share/virtualenv/wheel/3.9/image/1/CopyPipInstall/pip-22.3.1-py3-none-any/pip-22.3.1.virtualenv to /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/lib/python3.9/site-packages/pip-22.3.1.virtualenv [virtualenv/util/path/_sync.py:36]
  functional-py39: 262 D generated console scripts pip3 pip3.9 pip pip-3.9 [virtualenv/seed/embed/via_app_data/pip_install/base.py:41]
  functional-py39: 262 I add activators for Bash, CShell, Fish, Nushell, PowerShell, Python [virtualenv/run/session.py:61]
  functional-py39: 263 D write /home/brosmait/scratch/lang/python/tox/.tox/functional-py39/pyvenv.cfg [virtualenv/create/pyenv_cfg.py:30]
  functional-py39: 263 D 	home = /home/brosmait/.pyenv/versions/3.9.14/bin [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 263 D 	implementation = CPython [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 263 D 	version_info = 3.9.14.final.0 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 263 D 	virtualenv = 20.17.1 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 263 D 	include-system-site-packages = false [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 263 D 	base-prefix = /home/brosmait/.pyenv/versions/3.9.14 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 263 D 	base-exec-prefix = /home/brosmait/.pyenv/versions/3.9.14 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 263 D 	base-executable = /home/brosmait/.pyenv/versions/3.9.14/bin/python3.9 [virtualenv/create/pyenv_cfg.py:34]
  functional-py39: 264 W commands[0]> bash ts.sh functional [tox/tox_env/api.py:427]
  functional-py39: 266 I exit 0 (0.00 seconds) /home/brosmait/scratch/lang/python/tox> bash ts.sh functional pid=315721 [tox/execute/api.py:275]
    py39: OK (0.10=setup[0.10]+cmd[0.00] seconds)
    functional-py39: OK (0.08=setup[0.08]+cmd[0.00] seconds)
    congratulations :) (0.21 seconds)
  
  ❯  cat tmpfile
  testenv: ./cinderclient/tests/unit
  functional: ./cinderclient/tests/unit
  ```
  
  ## Minimal example
  
  If possible, provide a minimal reproducer for the issue:
  
  (see file above)
  
  ## Observations
  
  1. The "abstract" testenv is necessary, that is, the bug isn't reproducible if you just have 2 testenvs.
  
  2. I think this may have something to do with lazy loading of environments in tox4, because the bug doesn't occur if we *use* that intermediate "abstract" environment:
  
  ```console
  ❯   ./tox4 -e py39,functional,functional-py39
  py39: commands[0]> bash ts.sh testenv
  py39: OK ✔ in 0.02 seconds
  functional: commands[0]> bash ts.sh functional
  functional: OK ✔ in 0 seconds
  functional-py39: commands[0]> bash ts.sh functional
    py39: OK (0.02=setup[0.02]+cmd[0.00] seconds)
    functional: OK (0.00=setup[0.00]+cmd[0.00] seconds)
    functional-py39: OK (0.00=setup[0.00]+cmd[0.00] seconds)
    congratulations :) (0.05 seconds)
  
  ❯  cat tmpfile
  testenv: ./cinderclient/tests/unit
  functional: ./cinderclient/tests/functional
  functional: ./cinderclient/tests/functional
  ```
  ... though, of course, the whole point of the "abstract" testenv is that you normally don't use it directly.
  
  3. The output for 'tox c' doesn't include the change to the env var:
  
  ```console
  ❯  ./tox4 c -k set_env -e py39,functional,functional-py39
  [testenv:py39]
  set_env =
    OS_TEST_PATH=./cinderclient/tests/unit
    PIP_DISABLE_PIP_VERSION_CHECK=1
    PYTHONHASHSEED=4137894661
    PYTHONIOENCODING=utf-8
  
  [testenv:functional]
  set_env =
    OS_TEST_PATH=./cinderclient/tests/unit
    PIP_DISABLE_PIP_VERSION_CHECK=1
    PYTHONHASHSEED=4137894661
    PYTHONIOENCODING=utf-8
  
  [testenv:functional-py39]
  set_env =
    OS_TEST_PATH=./cinderclient/tests/unit
    PIP_DISABLE_PIP_VERSION_CHECK=1
    PYTHONHASHSEED=4137894661
    PYTHONIOENCODING=utf-8
  ```
  This seems kind of bad to me, because people not using the "abstract" testenv will still see misleading results from the 'tox c' output.  In other words, if you only had [testenv] and [testenv:functional] defined (forget about the "abstract" business), 'tox c' does *not* show the value that tox is actually using for OS_TEST_PATH when you call 'tox -e functional', which makes debugging the config file difficult.
  
  4. If the pattern I'm using to have an "abstract" job is stupid, please let me know what a better way to do this is and I'll be happy to use it.  But if it's a reasonable thing to do, I imagine I'm not the only one doing it, and it's going to cause difficulties upgrading from tox3 to tox4.  (I mean, the workaround is easy enough, just violate the DRY principle and explicitly set all the env vars, but you have to know to do it.)