Warnings as Errors

The allWarningsAsErrors property instructs the Kotlin compiler to treat every compiler warning as a hard error, causing the build to fail if any warnings are present.

Default

allWarningsAsErrors is disabled by default (false) in Kreate.

Configuration

kreate {
    platform {
        allWarningsAsErrors = true
    }
}

Behavior

When enabled, any Kotlin compiler warning — including deprecation notices, unused variable warnings, and unchecked cast warnings — will cause the compilation task to fail with an error.

This is enforced by passing -Werror to the Kotlin compiler options for all compilation tasks in the module.

Example Output

e: file.kt:12:5: 'foo' is deprecated. Use 'bar' instead.

25 April 2026