{
  "context": "Tests whether the response correctly explains Rust ownership/borrowing errors with threads.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Identifies the closure capture issue",
      "description": "Explains that the closure borrows data, but the thread might outlive the main function, so Rust requires ownership transfer",
      "max_score": 15
    },
    {
      "name": "Fix 1: move keyword",
      "description": "Shows using move || to transfer ownership into the thread (and removing the second println since data is moved)",
      "max_score": 12
    },
    {
      "name": "Fix 2: Arc or clone",
      "description": "Shows using Arc<Vec> to share ownership across threads, or cloning the data before spawning",
      "max_score": 12
    },
    {
      "name": "No incorrect information",
      "description": "Response does not contain factually wrong statements about Rust ownership, lifetimes, or thread safety",
      "max_score": 12
    }
  ]
}