Contents
description bug_report

throw_in_finally

Contents

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:

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

GOOD:

dart
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:

analysis_options.yaml
yaml
linter:
  rules:
    - throw_in_finally