Examples of errors detected by the V6010 diagnostic

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

Create

V6010 The return value of function 'max' is required to be utilized. ScheduleScreen.java 557

for (List<ScheduleWaitCondition> list : entry.conditions) {
  int maxWidth = getConditionColumnWidth(list);
  for (int i = 0; i < list.size(); i++) {
    ScheduleWaitCondition scheduleWaitCondition = list.get(i);
    Math.max(maxWidth, renderInput(....));   // <=
    scheduleWaitCondition.renderSpecialIcon(....);
  }
  AllGuiTextures.SCHEDULE_CONDITION_APPEND.render(
    graphics,
    xOffset + (maxWidth - 10) / 2,
    29 + list.size() * 18
  );
  xOffset += maxWidth + 10;
}

Create

V6010 The return value of function 'replaceAll' is required to be utilized. SchematicEditScreen.java 130

public boolean keyPressed(int code, ....) {
  if (isPaste(code)) {
    String coords = minecraft.keyboardHandler.getClipboard();
    if (coords != null && !coords.isEmpty()) {
      coords.replaceAll(" ", "");             // <=
      String[] split = coords.split(",");
      if (split.length == 3) {
        boolean valid = true;
        for (String s : split) {
          try {
            Integer.parseInt(s);
          } catch (NumberFormatException e) {
            valid = false;
          }
        }
        if (valid) {
          xInput.setValue(split[0]);
          yInput.setValue(split[1]);
          zInput.setValue(split[2]);
          return true;
        }
      }
    }
  }
  ....
}

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;
}