throw_in_finally

Avoid throw in finally block.

This rule is available as of Dart 2.0.

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;
  }
}

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

Unless stated otherwise, the documentation on this site reflects Dart 3.6.0. Page last updated on 2024-07-03. View source or report an issue.