Issue Link

#153064

Target

stable

Cherry pick PR Link

#154380

Changelog Description

Prevents CLI crashes when shutting down after running a Flutter app on a browser.

Impacted Users

All Flutter for Web developers

Impact Description

Impacts development during flutter run -d <browser> workflows. Noisy crashes are generated in scenarios where the CLI tool cannot communicate to the browser (e.g. because the user closed the browser before the app finished bootstrapping).

Workaround

No. There is nothing to do but to ignore the crash output.

Risk

low

Test Coverage

yes

Validation Steps

Create a Flutter app that targets the web. Run flutter run -d chrome. Once the app has finished running., press q to quit. The CLI should terminate without a crash.