FP S2589 Boolean expressions should not be gratuitous

Rules and Languages
1

Language: Java
Rule: S2589
Product: SonarQube Community Edition Version 25.2 and SonarQube IDE
Description:
When getting a value from a Map it can never be assumed that the result must be NonNull.

Code Snipet:

import java.util.List;
import java.util.Map;

import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.jdt.annotation.Nullable;

public class S2589Test {

    public void test(Map<Long, List<@NonNull String>> testMap) {
        List<@NonNull String> list = testMap.get(Long.valueOf(17));
        // Remove this expression which always evaluates to "true"
        if (list != null) {
            System.err.println("[S2589Test] test - " + list.toString());
        }
    }

}

The analysis seems to be thrown off course by the ‘NonNull String’. If this is removed then SonarQube does not show an error.

4

Hello, thanks for the report.
I created a ticket to track this FP.