Examples of errors detected by the V6010 diagnostic

V6010. The return value of function 'Foo' is required to be utilized.

Huawei Cloud

V6010 The return value of function 'concat' is required to be utilized. AKSK.java(278)

public static String buildCanonicalHost(URL url)
{
  String host = url.getHost();
  int port = url.getPort();
  if (port > -1) {
    host.concat(":" + Integer.toString(port));
  }
  return host;
}

NGB

V6010 The return value of function 'map' is required to be utilized. GffManager.java(477)

public NggbIntervalTreeMap<Gene> loadGenesIntervalMap(GeneFile geneFile,
                                                      int startIndex,
                                                      int endIndex,
                                                      Chromosome chromosome) {
    ....
    List<Future<Boolean>> results;
    try {
        results = taskExecutorService.getExecutorService().invokeAll(callables);
    } catch (InterruptedException | AssertionError e) {
        throw new GeneReadingException(geneFile,
                                       chromosome,
                                       startIndex,
                                       endIndex,
                                       e);
    }

    results.stream().map(future -> {
        try {
            return future != null ? future.get() : null;
        } catch (InterruptedException | ExecutionException e) {
            log.error(getMessage(MessagesConstants.ERROR_GENE_BATCH_LOAD,
                                 geneFile.getId(),
                                 chromosome.getId(),
                                 e));
        }
        return null;
    });
    ....
    return genesRangeMap;
}

IntelliJ IDEA Community Edition

V6010 The return value of function 'map' is required to be utilized. ParameterObjectBuilder.java(103)

public String buildBeanClass() {
    if (recordsAvailable) {
        out.append("(");
        fields.stream().map(param -> param.getType()
                                          .getCanonicalText(true)
                                          + " " + param.getName());
        StringUtil.join(fields, param -> {
          return ....;
        }, ", ", out);
        out.append("){}");
    } else ....
}