throw_in_finally

Details
Usage

Avoid throw in finally block.

This rule is available as of Dart 2.0.0.

Details

AVOID throwing exceptions in finally blocks.

Throwing exceptions in finally blocks will inevitably cause unexpected behavior that is hard to debug.

BAD:

class BadThrow {
  double nonCompliantMethod() {
    try {
      print('hello world! ${1 / 0}');
    } catch (e) {
      print(e);
    } finally {
      throw 'Find the hidden error :P'; // LINT
    }
  }
}

GOOD:

class Ok {
  double compliantMethod() {
    var i = 5;
    try {
      i = 1 / 0;
    } catch (e) {
      print(e); // OK
    }
    return i;
  }
}

Usage

To enable the throw_in_finally rule, add throw_in_finally under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - throw_in_finally