Examples of errors detected by the V6010 diagnostic

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

CustomNPC+

V6010 The return value of function 'replaceAll' is required to be utilized. TextContainer.java 35

public class TextContainer {
    public String text;
    ....

    public TextContainer(String text) {
        this.text = text;
        text.replaceAll("\\r?\\n|\\r", "\n");
        double l = 1.0D;
    }
    ....
}

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);
  ....
}

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;
}

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);
      }*/
    }
  }
}

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 ....
}

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;
}

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;
}