cancel_subscriptions
Uncancelled instance of 'StreamSubscription'.
Description
#The analyzer produces this diagnostic when an instance of StreamSubscription
is created but the method cancel
isn't invoked.
Example
#The following code produces this diagnostic because the subscription
isn't canceled:
dart
import 'dart:async';
void f(Stream stream) {
// ignore: unused_local_variable
var subscription = stream.listen((_) {});
}
Common fixes
#Cancel the subscription:
dart
import 'dart:async';
void f(Stream stream) {
var subscription = stream.listen((_) {});
subscription.cancel();
}
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.