Enabling Asserts in Release Mode in Dart / Flutter

When running a Dart or Flutter app, assertions are only enabled in Debug mode.

But in Release mode, they are disabled by default.

To change this behavior, add the --enable-asserts flag when running from the command line:

Alternatively, you can set this flag in your VSCode settings file:

"dart.vmAdditionalArgs": [ "--enable-asserts" ]

Want More?

Invest in yourself with my high-quality Flutter courses.

Flutter Foundations Course

Flutter Foundations Course

Learn about State Management, App Architecture, Navigation, Testing, and much more by building a Flutter eCommerce app on iOS, Android, and web.

Flutter & Firebase Masterclass

Flutter & Firebase Masterclass

Learn about Firebase Auth, Cloud Firestore, Cloud Functions, Stripe payments, and much more by building a full-stack eCommerce app with Flutter & Firebase.

The Complete Dart Developer Guide

The Complete Dart Developer Guide

Learn Dart Programming in depth. Includes: basic to advanced topics, exercises, and projects. Fully updated to Dart 2.15.

Flutter Animations Masterclass

Flutter Animations Masterclass

Master Flutter animations and build a completely custom habit tracking application.