sonarqube5.1 - 发现 'UR' - 变量异常

Question

我有这个声纳错误主要:

Found 'UR'-anomaly for variable 'language' (lines '83'-'85')

在这个函数中:

public void saveAll(List<Language> languages){
   //Found 'UR'-anomaly for variable 'country' (lines '83'-'85').       
   //Code Smell   Major    Open    Not assigned   20min effort   Comment
   for (Language language: languages) {
        save(language);
   }
}

请如何解决这个重大错误，谢谢提前

Answer 1

编辑 :
在其他 SO 帖子中找到了更多信息。虽然这更以 PMD 为中心，但您可能会对背景信息感兴趣。
Java for each loop being flagged as UR anomaly by PMD .

这似乎是 PMD 的规则。定义:

The dataflow analysis tracks local definitions, undefinitions and references to variables on different paths on the data flow. From those informations there can be found various problems. 1. UR - Anomaly: There is a reference to a variable that was not defined before. This is a bug and leads to an error. 2. DU - Anomaly: A recently defined variable is undefined. These anomalies may appear in normal source text. 3. DD - Anomaly: A recently defined variable is redefined. This is ominous but don't have to be a bug.

有一个开放的错误报告:
https://sourceforge.net/p/pmd/bugs/1190/

在示例中，他们为数组报告了它，但有人评论说，这也发生在他们身上，也发生在集合中。

例子:

public static void main(final String[] args) {
    for (final String string : args) {
        string.getBytes(); //UR Anomaly
    }
    for (int i = 0; i < args.length; i++) {
        args[i].getBytes();
    }
}

在我们的声纳设置中，我们不使用此规则。根据可用信息，您可能不希望在您的信息中使用它。