Error-Prone would fail the build when it detects violations. The test code is not verified.
The check takes 4-5 minutes.
One can execute the verification locally via ./gradlew -PenableErrorpone -Pwerror=false classes
Calcite uses Werror by default to fail on javac warnings, so -Pwerror=false allows Error-Prone to display all the warnings.
Most of the changes (35 commits in total, +5,779 −5,015) are for the following checks: