Program: 62223
Project: 62223
Buggy source:
@Override public CSARDependency parse(Node node,ParsingContextExecution context){
  String valueAsString=scalarParser.parse(node,context);
  if (valueAsString == null || valueAsString.trim().isEmpty()) {
    return null;
  }
  if (valueAsString.contains("String_Node_Str")) {
    String[] dependencyStrs=valueAsString.split("String_Node_Str");
    if (dependencyStrs.length == 2) {
      String dependencyName=dependencyStrs[0];
      String dependencyVersion=dependencyStrs[1];
      String currentArchiveVersion=context.<ArchiveRoot>getRootObj().getArchive().getVersion();
      CSARDependency dependency=new CSARDependency(dependencyName,dependencyVersion);
      Csar csar=ToscaContext.get().getArchive(dependency.getName(),dependency.getVersion());
      log.debug("String_Node_Str",dependency.getName(),dependency.getVersion(),csar);
      if (csar == null) {
        context.getParsingErrors().add(new ParsingError(ParsingErrorLevel.WARNING,ErrorCode.MISSING_DEPENDENCY,"String_Node_Str",node.getStartMark(),"String_Node_Str",node.getEndMark(),valueAsString));
      }
 else {
        if (!VersionUtil.isSnapshot(currentArchiveVersion) && VersionUtil.isSnapshot(dependencyVersion)) {
          context.getParsingErrors().add(new ParsingError(ParsingErrorLevel.ERROR,ErrorCode.SNAPSHOT_DEPENDENCY,"String_Node_Str",node.getStartMark(),"String_Node_Str",node.getEndMark(),valueAsString));
        }
        dependency.setHash(csar.getHash());
        ToscaContext.get().addDependency(dependency);
      }
      return dependency;
    }
    context.getParsingErrors().add(new ParsingError(ParsingErrorLevel.WARNING,ErrorCode.SYNTAX_ERROR,"String_Node_Str",node.getStartMark(),"String_Node_Str",node.getEndMark(),"String_Node_Str"));
  }
 else {
    throw new NotSupportedException("String_Node_Str");
  }
  return null;
}

Fixed version (ground truth):
@Override public CSARDependency parse(Node node,ParsingContextExecution context){
  String valueAsString=scalarParser.parse(node,context);
  if (valueAsString == null || valueAsString.trim().isEmpty()) {
    return null;
  }
  if (valueAsString.contains("String_Node_Str")) {
    String[] dependencyStrs=valueAsString.split("String_Node_Str");
    if (dependencyStrs.length == 2) {
      String dependencyName=dependencyStrs[0];
      String dependencyVersion=dependencyStrs[1];
      String currentArchiveVersion=context.<ArchiveRoot>getRootObj().getArchive().getVersion();
      CSARDependency dependency=new CSARDependency(dependencyName,dependencyVersion);
      Csar csar=ToscaContext.get().getArchive(dependency.getName(),dependency.getVersion());
      log.debug("String_Node_Str",dependency.getName(),dependency.getVersion(),csar);
      if (csar == null) {
        context.getParsingErrors().add(new ParsingError(ParsingErrorLevel.WARNING,ErrorCode.MISSING_DEPENDENCY,"String_Node_Str",node.getStartMark(),"String_Node_Str",node.getEndMark(),valueAsString));
        return null;
      }
 else {
        if (!VersionUtil.isSnapshot(currentArchiveVersion) && VersionUtil.isSnapshot(dependencyVersion)) {
          context.getParsingErrors().add(new ParsingError(ParsingErrorLevel.ERROR,ErrorCode.SNAPSHOT_DEPENDENCY,"String_Node_Str",node.getStartMark(),"String_Node_Str",node.getEndMark(),valueAsString));
        }
        dependency.setHash(csar.getHash());
        ToscaContext.get().addDependency(dependency);
        return dependency;
      }
    }
    context.getParsingErrors().add(new ParsingError(ParsingErrorLevel.WARNING,ErrorCode.SYNTAX_ERROR,"String_Node_Str",node.getStartMark(),"String_Node_Str",node.getEndMark(),"String_Node_Str"));
  }
 else {
    throw new NotSupportedException("String_Node_Str");
  }
  return null;
}