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 ....
}

jMonkeyEngine

V6010 The return value of function 'get' is required to be utilized. FbxTexture.java(101)

@Override
public void fromElement(FbxElement element) {
  super.fromElement(element);
  if (getSubclassName().equals("")) {
    for (FbxElement e : element.children) {
      if (e.id.equals("Type")) {
        e.properties.get(0);
      }
      /*else if (e.id.equals("FileName")) {
        filename = (String) e.properties.get(0);
      }*/
    }
  }
}

GeoServer

V6010 The return value of function 'emptySet' is required to be utilized. ReaderDimensionsAccessor.java 149

public TreeSet<Object> getTimeDomain() throws IOException {
  if (!hasTime()) {
    Collections.emptySet();
  }
  ....

  return values;
}

GeoServer

V6010 The return value of function 'new ArrayList' is required to be utilized. CoverageViewEditor.java 85

public CoverageViewEditor(
    String id,
    final IModel<List<String>> inputCoverages,
    final IModel<List<CoverageBand>> bands,
    IModel<EnvelopeCompositionType> envelopeCompositionType,
    IModel<SelectedResolution> selectedResolution,
    IModel<String> resolutionReferenceCoverage,
    List<String> availableCoverages) {
  ....
  coveragesChoice.setOutputMarkupId(true);
  add(coveragesChoice);

  new ArrayList<CoverageBand>();             // <=
  outputBandsChoice =
      new ListMultipleChoice<>(
          "outputBandsChoice",
          new Model<>(),
          new ArrayList<>(outputBands.getObject()),
          new ChoiceRenderer<CoverageBand>() {
            @Override
            public Object getDisplayValue(CoverageBand vcb) {
              return vcb.getDefinition();
            }
          });
  outputBandsChoice.setOutputMarkupId(true);
  add(outputBandsChoice);
  ....
}