ARCHIVED TRAINING / tophat/syrupy

tophat__syrupy-761

This is a preserved training example. Membership in the current training wave has not been verified.

Problem statement

Syrupy is recognizing snapshot as not being used (4.0.1)
**Describe the bug**

This is probably a regression in the latest release. I didn't observe the behavior in 4.0.0:

1. On a new test with no snapshot (using the `json` extension), I get the expected behaviour:
> 1 snapshot failed
> Snapshot 'TestFoo.test_foo' does not exist!
2. With the first `pytest --snapshot-update` (this is where the first signs of the bug is):
> 1 snapshot generated. 1 unused snapshot deleted.
Deleted TestFoo (tests/foo/__snapshots__/test_foo/TestFoo.test_foo.json)

Why does it output `Deleted ....`, that isn't the expected behaviour (the deletion doesn't happen though)
3. Another follow up when running `pytest`:
> 1 snapshot passed. 1 snapshot unused.
Re-run pytest with --snapshot-update to delete unused snapshots.

Again, that isn't correct. It gets worse though:
4. `pytest --snapshot-update`:
This time the deletion *will* happen hence the next run of `pytest` will fail since it won't find a snapshot.

# Env: 

Syrupy 4.0.1
Python 3.10


Going back to 4.0.0 solved the issue.

Training membership

opd_e4b_pure_v6a 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_v6a",
    "opd_e4b_pure_v6b"
  ],
  "examples": 4,
  "instance_id": "tophat__syrupy-761",
  "problem_statement": "Syrupy is recognizing snapshot as not being used (4.0.1)\n**Describe the bug**\r\n\r\nThis is probably a regression in the latest release. I didn't observe the behavior in 4.0.0:\r\n\r\n1. On a new test with no snapshot (using the `json` extension), I get the expected behaviour:\r\n> 1 snapshot failed\r\n> Snapshot 'TestFoo.test_foo' does not exist!\r\n2. With the first `pytest --snapshot-update` (this is where the first signs of the bug is):\r\n> 1 snapshot generated. 1 unused snapshot deleted.\r\nDeleted TestFoo (tests/foo/__snapshots__/test_foo/TestFoo.test_foo.json)\r\n\r\nWhy does it output `Deleted ....`, that isn't the expected behaviour (the deletion doesn't happen though)\r\n3. Another follow up when running `pytest`:\r\n> 1 snapshot passed. 1 snapshot unused.\r\nRe-run pytest with --snapshot-update to delete unused snapshots.\r\n\r\nAgain, that isn't correct. It gets worse though:\r\n4. `pytest --snapshot-update`:\r\nThis time the deletion *will* happen hence the next run of `pytest` will fail since it won't find a snapshot.\r\n\r\n# Env: \r\n\r\nSyrupy 4.0.1\r\nPython 3.10\r\n\r\n\r\nGoing back to 4.0.0 solved the issue.",
  "repo": "tophat/syrupy",
  "source": "v2/experiments/train_data/opd_e4b_pure_v6a/verified_rft_messages.jsonl",
  "source_sha256": "f045b7ca5b3883a1e2eaee81e1c02a4a1b53dd7b7b36e98bacb2ba5823a15148"
}

{
  "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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      "sha256": "92a4515fee9d152b0d4c510ee3ce4caaaffe2003ba7584469f8027f174aab18c"
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    {
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}