Program: 34736
Project: 34736
Buggy source:
public OpenAPI parseRoot(JsonNode node,ParseResult result,OpenAPI startingModel){
  String location="String_Node_Str";
  OpenAPI openAPI=new OpenAPIImpl();
  if (startingModel != null)   openAPI=startingModel;
  if (node.getNodeType().equals(JsonNodeType.OBJECT)) {
    ObjectNode rootNode=(ObjectNode)node;
    String value=getString("String_Node_Str",rootNode,true,location,result);
    if (value == null || !value.startsWith("String_Node_Str")) {
      return null;
    }
    openAPI.setOpenapi(value);
    ObjectNode obj=getObject("String_Node_Str",rootNode,true,location,result);
    if (obj != null) {
      Info info=getInfo(obj,"String_Node_Str",result);
      openAPI.setInfo(info);
    }
    obj=getObject("String_Node_Str",rootNode,true,location,result);
    if (obj != null) {
      Paths paths=getPaths(obj,"String_Node_Str",result);
      openAPI.setPaths(paths);
    }
    obj=getObject("String_Node_Str",rootNode,false,location,result);
    if (obj != null) {
      Components components=getComponents(obj,"String_Node_Str",result);
      openAPI.setComponents(components);
    }
    ArrayNode array=getArray("String_Node_Str",rootNode,false,location,result);
    if (array != null && array.size() > 0) {
      openAPI.setServers(getServersList(array,String.format("String_Node_Str",location,"String_Node_Str"),result));
    }
    obj=getObject("String_Node_Str",rootNode,false,location,result);
    if (obj != null) {
      ExternalDocumentation externalDocs=getExternalDocs(obj,"String_Node_Str",result);
      openAPI.setExternalDocs(externalDocs);
    }
    array=getArray("String_Node_Str",rootNode,false,location,result);
    if (array != null && array.size() > 0) {
      openAPI.setTags(getTagList(array,"String_Node_Str",result));
    }
    array=getArray("String_Node_Str",rootNode,false,location,result);
    if (array != null && array.size() > 0) {
      List<SecurityRequirement> securityRequirements=getSecurityRequirementsList(array,"String_Node_Str",result);
      if (securityRequirements != null && securityRequirements.size() > 0) {
        openAPI.setSecurity(securityRequirements);
      }
    }
    Map<String,Object> extensions=getExtensions(rootNode);
    if (extensions != null && extensions.size() > 0) {
      openAPI.setExtensions(extensions);
    }
    Set<String> keys=getKeys(rootNode);
    for (    String key : keys) {
      if (!ROOT_KEYS.contains(key) && !key.startsWith("String_Node_Str")) {
        result.extra(location,key,node.get(key));
      }
    }
  }
 else {
    result.invalidType(location,"String_Node_Str","String_Node_Str",node);
    result.invalid();
    return null;
  }
  return openAPI;
}

Fixed version (ground truth):
public OpenAPI parseRoot(JsonNode node,ParseResult result,OpenAPI startingModel){
  String location="String_Node_Str";
  OpenAPI openAPI=new OpenAPIImpl();
  if (startingModel != null)   openAPI=startingModel;
  if (node.getNodeType().equals(JsonNodeType.OBJECT)) {
    ObjectNode rootNode=(ObjectNode)node;
    String value=getString("String_Node_Str",rootNode,true,location,result);
    if (value == null || !value.startsWith("String_Node_Str")) {
      return null;
    }
    openAPI.setOpenapi(value);
    ObjectNode obj=getObject("String_Node_Str",rootNode,true,location,result);
    if (obj != null) {
      Info info=getInfo(obj,"String_Node_Str",result);
      openAPI.setInfo(info);
    }
    obj=getObject("String_Node_Str",rootNode,true,location,result);
    if (obj != null) {
      Paths paths=getPaths(obj,"String_Node_Str",result);
      if (openAPI.getPaths() != null && paths != null && paths.size() > 0) {
        for (        Entry<String,PathItem> entry : paths.entrySet()) {
          openAPI.path(entry.getKey(),entry.getValue());
        }
      }
 else {
        openAPI.setPaths(paths);
      }
    }
    obj=getObject("String_Node_Str",rootNode,false,location,result);
    if (obj != null) {
      Components components=getComponents(obj,"String_Node_Str",result);
      if (components != null && openAPI.getComponents() != null) {
        mergeComponents(openAPI.getComponents(),components);
      }
 else       if (components != null) {
        openAPI.setComponents(components);
      }
    }
    ArrayNode array=getArray("String_Node_Str",rootNode,false,location,result);
    if (array != null && array.size() > 0) {
      List<Server> servers=getServersList(array,String.format("String_Node_Str",location,"String_Node_Str"),result);
      if (openAPI.getServers() != null && openAPI.getServers().size() > 0 && servers != null && servers.size() > 0) {
        for (        Server server : servers) {
          openAPI.addServer(server);
        }
      }
 else       if (servers != null && servers.size() > 0) {
        openAPI.setServers(servers);
      }
    }
    obj=getObject("String_Node_Str",rootNode,false,location,result);
    if (obj != null) {
      ExternalDocumentation externalDocs=getExternalDocs(obj,"String_Node_Str",result);
      openAPI.setExternalDocs(externalDocs);
    }
    array=getArray("String_Node_Str",rootNode,false,location,result);
    if (array != null && array.size() > 0) {
      List<Tag> tags=getTagList(array,"String_Node_Str",result);
      if (openAPI.getTags() != null && openAPI.getTags().size() > 0 && tags != null && tags.size() > 0) {
        Map<String,Tag> tagsMap=new LinkedHashMap<>();
        for (        Tag tag : openAPI.getTags()) {
          tagsMap.put(tag.getName(),tag);
        }
        for (        Tag tag : tags) {
          tagsMap.put(tag.getName(),tag);
        }
        openAPI.setTags(new ArrayList<>(tagsMap.values()));
      }
 else       if (tags != null && tags.size() > 0) {
        openAPI.setTags(tags);
      }
    }
    array=getArray("String_Node_Str",rootNode,false,location,result);
    if (array != null && array.size() > 0) {
      List<SecurityRequirement> securityRequirements=getSecurityRequirementsList(array,"String_Node_Str",result);
      if (openAPI.getSecurity() != null && securityRequirements != null && securityRequirements.size() > 0) {
        for (        SecurityRequirement securityRequirement : securityRequirements) {
          openAPI.addSecurityRequirement(securityRequirement);
        }
      }
 else       if (securityRequirements != null && securityRequirements.size() > 0) {
        openAPI.setSecurity(securityRequirements);
      }
    }
    Map<String,Object> extensions=getExtensions(rootNode);
    if (openAPI.getExtensions() != null && extensions != null && extensions.size() > 0) {
      openAPI.setExtensions(mergeMaps(openAPI.getExtensions(),extensions));
    }
 else     if (extensions != null && extensions.size() > 0) {
      openAPI.setExtensions(extensions);
    }
    Set<String> keys=getKeys(rootNode);
    for (    String key : keys) {
      if (!ROOT_KEYS.contains(key) && !key.startsWith("String_Node_Str")) {
        result.extra(location,key,node.get(key));
      }
    }
  }
 else {
    result.invalidType(location,"String_Node_Str","String_Node_Str",node);
    result.invalid();
    return null;
  }
  return openAPI;
}