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tox-dev__tox-3683

This is a preserved training example. Membership in the current training wave has not been verified.
tox-dev/tox · Task 161 of 169

Problem statement

`tox config -e pyXX` gives useless results if `XX` is invalid
## Issue

(note: Consider this very low-priority or even closeable. I'm mainly reporting it so there's a record of the behavior somewhere)

Contrast:

```
❯ tox -e py47 run
py47: skipped because could not find python interpreter with spec(s): py47
  py47: SKIP (0.00 seconds)
  evaluation failed :( (0.24 seconds)

❯ echo $?
255
```

With:

```
❯ tox -e py47 config
[testenv:py47]
type = VirtualEnvRunner
...
{snipped}
...
env_site_packages_dir = # Exception: RuntimeError("failed to find interpreter for Builtin discover of python_spec='py47'")
env_bin_dir = # Exception: RuntimeError("failed to find interpreter for Builtin discover of python_spec='py47'")
env_python = # Exception: RuntimeError("failed to find interpreter for Builtin discover of python_spec='py47'")
py_dot_ver = # Exception: Skip('could not find python interpreter with spec(s): py47')
py_impl = # Exception: Skip('could not find python interpreter with spec(s): py47')
py_free_threaded = # Exception: Skip('could not find python interpreter with spec(s): py47')
...
{snipped}
...
wheel_build_env = # Exception: Skip('could not find python interpreter with spec(s): py47')

❯ echo $?
0
```

I suspect we want the latter to at least return an error code. This happens if `py` isn't part of any factor:

```
❯ tox -e foobar config
ROOT: HandledError| provided environments not found in configuration file:
foobar

❯ echo $?
254
```

## Environment

Irrelevant.

## Output of running tox

```
❯ tox --version
4.32.0 from /usr/lib/python3.14/site-packages/tox/__init__.py
```

</details>

## Minimal example

See above.

Training membership

opd_e4b_pure_v6b

Task issues extracted from preserved verified_rft_messages training examples. This is not a verified current RL wave manifest.

Task and snapshot provenance

Snapshot captured 2026-11-12T17:06:59.476467+00:00 · Autoresearch-Arena/gemma-4-developer-agent

{
  "datasets": [
    "opd_e4b_pure_v6b"
  ],
  "examples": 2,
  "instance_id": "tox-dev__tox-3683",
  "problem_statement": "`tox config -e pyXX` gives useless results if `XX` is invalid\n## Issue\n\n(note: Consider this very low-priority or even closeable. I'm mainly reporting it so there's a record of the behavior somewhere)\n\nContrast:\n\n```\n❯ tox -e py47 run\npy47: skipped because could not find python interpreter with spec(s): py47\n  py47: SKIP (0.00 seconds)\n  evaluation failed :( (0.24 seconds)\n\n❯ echo $?\n255\n```\n\nWith:\n\n```\n❯ tox -e py47 config\n[testenv:py47]\ntype = VirtualEnvRunner\n...\n{snipped}\n...\nenv_site_packages_dir = # Exception: RuntimeError(\"failed to find interpreter for Builtin discover of python_spec='py47'\")\nenv_bin_dir = # Exception: RuntimeError(\"failed to find interpreter for Builtin discover of python_spec='py47'\")\nenv_python = # Exception: RuntimeError(\"failed to find interpreter for Builtin discover of python_spec='py47'\")\npy_dot_ver = # Exception: Skip('could not find python interpreter with spec(s): py47')\npy_impl = # Exception: Skip('could not find python interpreter with spec(s): py47')\npy_free_threaded = # Exception: Skip('could not find python interpreter with spec(s): py47')\n...\n{snipped}\n...\nwheel_build_env = # Exception: Skip('could not find python interpreter with spec(s): py47')\n\n❯ echo $?\n0\n```\n\nI suspect we want the latter to at least return an error code. This happens if `py` isn't part of any factor:\n\n```\n❯ tox -e foobar config\nROOT: HandledError| provided environments not found in configuration file:\nfoobar\n\n❯ echo $?\n254\n```\n\n## Environment\n\nIrrelevant.\n\n## Output of running tox\n\n```\n❯ tox --version\n4.32.0 from /usr/lib/python3.14/site-packages/tox/__init__.py\n```\n\n</details>\n\n## Minimal example\n\nSee above.",
  "repo": "tox-dev/tox",
  "source": "v2/experiments/train_data/opd_e4b_pure_v6b/verified_rft_messages.jsonl",
  "source_sha256": "0f62460a9706eea5e1605255896f191ab00cb5706c5f1f2e1c293e9a718218dc"
}
{
  "captured_at": "2026-11-12T17:06:59.476467+00:00",
  "membership": "archived training",
  "membership_evidence": "Task issues extracted from preserved verified_rft_messages training examples. This is not a verified current RL wave manifest.",
  "name": "Preserved post-training task archive",
  "source": "Autoresearch-Arena/gemma-4-developer-agent",
  "source_revision": "016496de222aaafca0d4ee4c18efc63ba616f76e",
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      "path": "v2/experiments/train_data/opd_e4b_pure_v7b/verified_rft_messages.jsonl",
      "sha256": "b864bdc8695183433eef6e31cb8d33fad44ba3aded2170c1ade4ad5b2944ce23"
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    },
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      "sha256": "18f4b3bd7e651f83c6acab479c9475e3fa50dc652a384f309e97146983ac85ba"
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}