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# no-unsafe-finally

[Added in v0.4.2](https://github.com/web-infra-dev/rslint/releases/tag/v0.4.2)
## Configuration

| Preset                   | Configured Value |
| ------------------------ | ---------------- |
| ✅ js.configs.recommended | `"error"`        |


```ts title=rslint.config.ts
import { defineConfig, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'no-unsafe-finally': 'error',
    },
  },
]);
```

## Rule Details

Disallows control flow statements (`return`, `throw`, `break`, `continue`) inside `finally` blocks. When control flow statements are used inside `finally` blocks, they override the control flow of `try` and `catch` blocks, which can lead to unexpected behavior and make code harder to understand.

Examples of **incorrect** code for this rule:

```javascript
function foo() {
  try {
    return 1;
  } catch (err) {
    return 2;
  } finally {
    return 3; // overrides the return in try/catch
  }
}

function bar() {
  try {
    doSomething();
  } finally {
    throw new Error(); // overrides any error thrown in try
  }
}

label: try {
  return 0;
} finally {
  break label; // overrides the return in try
}
```

Examples of **correct** code for this rule:

```javascript
function foo() {
  try {
    return 1;
  } catch (err) {
    return 2;
  } finally {
    console.log('done');
  }
}

function bar() {
  try {
    doSomething();
  } finally {
    // control flow inside nested functions is fine
    function cleanup(x) {
      return x;
    }
    cleanup();
  }
}

function baz() {
  try {
    doSomething();
  } finally {
    // break/continue inside loops within finally is fine
    while (condition) {
      break;
    }
  }
}
```

## Original Documentation

- [ESLint: no-unsafe-finally](https://eslint.org/docs/latest/rules/no-unsafe-finally)
- [Source code](https://github.com/eslint/eslint/blob/v10.8.1/lib/rules/no-unsafe-finally.js)