Program: 62410
Project: 62410
Buggy source:
@Override public ImplementationArtifact parse(Node node,ParsingContextExecution context){
  if (node instanceof ScalarNode) {
    String artifactReference=((ScalarNode)node).getValue();
    Path artifactPath=Paths.get(artifactReference);
    String extension=Files.getFileExtension(artifactPath.getFileName().toString());
    String type=null;
    if (extension != null) {
      ArchiveRoot archiveRoot=(ArchiveRoot)context.getRoot().getWrappedInstance();
      IndexedArtifactType indexedType=getFromArchiveRoot(archiveRoot,extension);
      if (indexedType == null) {
        GetMultipleDataResult<IndexedArtifactType> artifactType=alienDao.find(IndexedArtifactType.class,MapUtil.newHashMap(new String[]{"String_Node_Str"},new String[][]{new String[]{extension}}),1);
        if (artifactType != null && artifactType.getData() != null && artifactType.getData().length > 0) {
          Set<CSARDependency> archiveDependencies=archiveRoot.getArchive().getDependencies();
          for (          IndexedArtifactType foundType : artifactType.getData()) {
            if (archiveDependencies.contains(new CSARDependency(foundType.getArchiveName(),foundType.getArchiveVersion()))) {
              type=foundType.getElementId();
              break;
            }
          }
        }
        if (type == null) {
          context.getParsingErrors().add(new ParsingError(ErrorCode.UNKNOWN_IMPLEMENTATION_ARTIFACT,"String_Node_Str",node.getStartMark(),"String_Node_Str",node.getEndMark(),extension));
          type="String_Node_Str";
        }
      }
 else {
        type=indexedType.getElementId();
      }
    }
    ImplementationArtifact artifact=new ImplementationArtifact();
    artifact.setArtifactRef(artifactReference);
    artifact.setArtifactType(type);
    return artifact;
  }
 else {
    ParserUtils.addTypeError(node,context.getParsingErrors(),"String_Node_Str");
  }
  return null;
}

Fixed version (ground truth):
@Override public ImplementationArtifact parse(Node node,ParsingContextExecution context){
  if (node instanceof ScalarNode) {
    String artifactReference=((ScalarNode)node).getValue();
    Path artifactPath=Paths.get(artifactReference);
    String extension=Files.getFileExtension(artifactPath.getFileName().toString());
    String type=null;
    ArchiveRoot archiveRoot=(ArchiveRoot)context.getRoot().getWrappedInstance();
    IndexedArtifactType indexedType=getFromArchiveRoot(archiveRoot,extension);
    if (indexedType == null) {
      IndexedArtifactType artifactType=repositorySearchService.getElementInDependencies(IndexedArtifactType.class,QueryBuilders.termQuery("String_Node_Str",extension),archiveRoot.getArchive().getDependencies());
      if (artifactType != null) {
        type=artifactType.getElementId();
      }
      if (type == null) {
        context.getParsingErrors().add(new ParsingError(ErrorCode.UNKNOWN_IMPLEMENTATION_ARTIFACT,"String_Node_Str",node.getStartMark(),"String_Node_Str",node.getEndMark(),extension));
        type="String_Node_Str";
      }
    }
 else {
      type=indexedType.getElementId();
    }
    ImplementationArtifact artifact=new ImplementationArtifact();
    artifact.setArtifactRef(artifactReference);
    artifact.setArtifactType(type);
    return artifact;
  }
 else {
    ParserUtils.addTypeError(node,context.getParsingErrors(),"String_Node_Str");
  }
  return null;
}