Examples of errors detected by the V6009 diagnostic

V6009. Function receives an odd argument.

Elasticsearch

V6009 Function 'equals' receives an odd argument. An object 'shardId.getIndexName()' is used as an argument to its own method. SnapshotShardFailure.java(208)

@Override
public boolean equals(Object o) {
  ....
  return shardId.id() == that.shardId.id() &&
      shardId.getIndexName().equals(shardId.getIndexName()) &&   // <=
      Objects.equals(reason, that.reason) &&
      Objects.equals(nodeId, that.nodeId) &&
      status.getStatus() == that.status.getStatus();
}

Elasticsearch

V6009 Function 'substring' receives an odd arguments. The 'queryStringIndex + 1' argument should not be greater than 'queryStringLength'. LoggingAuditTrail.java(660)

LogEntryBuilder withRestUriAndMethod(RestRequest request) {
  final int queryStringIndex = request.uri().indexOf('?');
  int queryStringLength = request.uri().indexOf('#');
  if (queryStringLength < 0) {
      queryStringLength = request.uri().length();
  }
  if (queryStringIndex < 0) {
      logEntry.with(....);
  } else {
      logEntry.with(....);
  }
  if (queryStringIndex > -1) {
      logEntry.with(....,
                    request.uri().substring(queryStringIndex + 1,// <=
                                            queryStringLength)); // <=
  }
  ....
}

CUBA Platform

V6009 The 'delete' function could receive the '-1' value while non-negative value is expected. Inspect argument: 1. AbstractCollectionDatasource.java(556)

protected DataLoadContextQuery createDataQuery(....) {
  ....
  StringBuilder orderBy = new StringBuilder();
  ....
  if (orderBy.length() > 0) {
      orderBy.delete(orderBy.length() - 2, orderBy.length());
      orderBy.insert(0, " order by ");
  }
  ....
}

Apache Hive

V6009 Function 'compareTo' receives an odd argument. An object 'o2.getWorkerIdentity()' is used as an argument to its own method. LlapFixedRegistryImpl.java(244)

@Override
public List<LlapServiceInstance> getAllInstancesOrdered(....) {
  ....
  Collections.sort(list, new Comparator<LlapServiceInstance>() {
    @Override
    public int compare(LlapServiceInstance o1, LlapServiceInstance o2) {
      return o2.getWorkerIdentity().compareTo(o2.getWorkerIdentity()); // <=
    }
  });
  ....
}

Apache Dubbo

V6009 The 'substring' function could receive the '-1' value while non-negative value is expected. Inspect argument: 2. AbstractEtcdClient.java(169)

protected void createParentIfAbsent(String fixedPath) {
  int i = fixedPath.lastIndexOf('/');
  if (i > 0) {
    String parentPath = fixedPath.substring(0, i);
    if (categories.stream().anyMatch(c -> fixedPath.endsWith(c))) {
      if (!checkExists(parentPath)) {
        this.doCreatePersistent(parentPath);
      }
    } else if (categories.stream().anyMatch(c -> parentPath.endsWith(c))) {
      String grandfather = parentPath
        .substring(0, parentPath.lastIndexOf('/'));           // <=
        if (!checkExists(grandfather)) {
          this.doCreatePersistent(grandfather);
        }
    }
  }
}

Huawei Cloud

V6009 The 'substring' function could receive the '-1' value while non-negative value is expected. Inspect argument: 2. RemoveVersionProjectIdFromURL.java(37)

@Override
public String apply(String url) {
  String urlRmovePojectId = url.substring(0, url.lastIndexOf("/"));
  return urlRmovePojectId.substring(0, urlRmovePojectId.lastIndexOf("/"));
}

Similar errors can be found in some other places:

• V6009 The 'substring' function could receive the '-1' value while non-negative value is expected. Inspect argument: 2. RemoveProjectIdFromURL.java(37)
• V6009 The 'substring' function could receive the '-1' value while non-negative value is expected. Inspect argument: 2. RemoveVersionProjectIdFromURL.java(38)

ELKI

V6009 Function 'equals' receives an odd argument. An object 'other.similarityFunction' is used as an argument to its own method. AbstractSimilarityAdapter.java(91)

@Override
public boolean equals(Object obj) {
    if(obj == null) {
        return false;
    }

    if(!this.getClass().equals(obj.getClass())) {
        return false;
    }

    AbstractSimilarityAdapter<?> other = (AbstractSimilarityAdapter<?>) obj;
    return other.similarityFunction.equals(other.similarityFunction);
}

NGB

V6009 The 'substring' function could receive the '-1' value while non-negative value is expected. Inspect argument: 2. VcfGa4ghReader.java(212)

private VariantSet variationMetadata(final String path) {
    final int index = path.indexOf('-');
    VariantSet variantSet;
    final String variantSetId;
    if (index >= 0) {
        variantSetId = path.substring(0, index - 1);
    } else {
        variantSetId = path;
    }
    ....
    return variantSet;
}

NGB

V6009 The 'substring' function could receive the '-1' value while non-negative value is expected. Inspect argument: 2. TabixReader.java(430)

private TIntv getIntv(final String s) {
    ....
    int end = s.indexOf('\t', beg);
    while (end >= 0 || end == -1) {
        if (col == mSc) {
            ....
        } else {
            if ((mPreset & TYPE_FLAG) == 0) {
                if (col == mEc) {
                    intv.end = Integer.parseInt(end != -1
                                                ? s.substring(beg, end)
                                                : s.substring(beg));
                }
            } else if ((mPreset & TYPE_FLAG) == 1) {
                if (col == 6) {
                    String cigar = s.substring(beg, end);
                    ....
                }
            } else if ((mPreset & TYPE_FLAG) == 2) {
                String alt;
                alt = end >= 0 ? s.substring(beg, end)
                               : s.substring(beg);
                ....
            }
        }
        if (end == -1) {
            break;
        }
        beg = end + 1;
        end = s.indexOf('\t', beg);
    }
    return intv;
}