What happened

Built checkstyle-12.2.0's code from source. I installed the .zip and ran
./mvnw clean install as mentioned in https://checkstyle.org/contributing.html

I expected the build to happen cleanly, yet it produced 2 errors on my local machine

Expected outcome

Not having these errors

Steps to recreate

1. Visit https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-12.2.0
2. Install the .zip file
3. Extract the zip file
4. Run the command ./mvnw clean install as mentioned in documentation

Environment details

• OS: Kali GNU/Linux
• Version: 2025.4
• Commit: 5e6ff5f
• Build: Official release JAR (sha256:fd9c1a7ace77e5fa77505434ab2a2ad028980b9bc5e62e2acf47e800eade6c7e)