{
  "id": "rust/e0599-no-method-found-for-result",
  "signature": "error[E0599]: no method named `unwrap_or_else` found for enum `std::result::Result<(), Box<dyn std::error::Error>>` in the current scope\n\nnote: the method `unwrap_or_else` exists but the following trait bounds were not satisfied: `std::result::Result<(), Box<dyn std::error::Error>>: UnwrapOrElse`",
  "signature_zh": "错误[E0599]：在当前作用域中，枚举 `std::result::Result<(), Box<dyn std::error::Error>>` 没有找到名为 `unwrap_or_else` 的方法\n\n注意：方法 `unwrap_or_else` 存在但以下 trait 约束未满足：`std::result::Result<(), Box<dyn std::error::Error>>: UnwrapOrElse`",
  "regex": "no method named `unwrap_or_else` found for enum `std::result::Result<.+>`",
  "domain": "rust",
  "category": "type_error",
  "subcategory": null,
  "root_cause": "Trying to call a method like `unwrap_or_else` on a `Result` type where the error type does not implement the required trait (e.g., `UnwrapOrElse`), often due to a missing import or a custom error type that doesn't implement `Debug`.",
  "root_cause_type": "generic",
  "root_cause_zh": "在 `Result` 类型上尝试调用像 `unwrap_or_else` 这样的方法，但错误类型没有实现所需的 trait（例如 `UnwrapOrElse`），通常是由于缺少导入或自定义错误类型未实现 `Debug`。",
  "versions": [
    {
      "version": "rustc 1.76",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "rustc 1.77",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "The method is inherent; the issue is trait bounds, not visibility.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "`UnwrapOrElse` is not a standard trait; the error is about missing `Debug` or other bounds.",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Ensure the error type implements `Debug`: add `#[derive(Debug)]` to your custom error type, or use `Box<dyn std::error::Error>`.",
      "success_rate": 0.9,
      "how": "Ensure the error type implements `Debug`: add `#[derive(Debug)]` to your custom error type, or use `Box<dyn std::error::Error>`.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use `match` or `if let` instead of `unwrap_or_else` for manual error handling.",
      "success_rate": 0.95,
      "how": "Use `match` or `if let` instead of `unwrap_or_else` for manual error handling.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "确保错误类型实现了 `Debug`：在自定义错误类型上添加 `#[derive(Debug)]`，或使用 `Box<dyn std::error::Error>`。",
    "使用 `match` 或 `if let` 代替 `unwrap_or_else` 进行手动错误处理。"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://doc.rust-lang.org/stable/error_codes/E0599.html",
  "official_doc_section": null,
  "error_code": "E0599",
  "verification_tier": "ai_generated",
  "confidence": 0.81,
  "fix_success_rate": 0.92,
  "resolvable": "true",
  "first_seen": "2024-01-10",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}