Flutter CI Broke With 2288 Errors — How dart fix --apply Saved Us

What Happened

One morning, deploy-prod.yml started failing:

error • Use 'const' with the constructor to improve performance lib/pages/landing_page.dart:12:15 • prefer_const_constructors ... (2287 more errors)

2,288 errors. A 200-page Flutter Web app went from green to red overnight.

The cause: one line in analysis_options.yaml .

# Before: prefer_const_constructors : warning

# The commit that broke everything: prefer_const_constructors : error

One severity upgrade. 2,288 CI failures.

The Fix

Step 1: Immediate rollback — warning not error

# analysis_options.yaml linter : rules : prefer_const_constructors : warning # downgrade back

This unblocks CI, but 2,288 warnings remain as a time bomb. Anyone upgrading to error again will re-trigger the same failure.…