Program: 16876
Project: 16876
Buggy source:
@Override public boolean equals(Object o){
  if (this == o) {
    return true;
  }
  if (o == null || getClass() != o.getClass()) {
    return false;
  }
  Tweet tweet=(Tweet)o;
  if (fromUserId != tweet.fromUserId) {
    return false;
  }
  if (id != tweet.id) {
    return false;
  }
  if (idStr != null ? !idStr.equals(tweet.idStr) : tweet.idStr != null) {
    return false;
  }
  if (retweeted != tweet.retweeted) {
    return false;
  }
  if (createdAt != null ? !createdAt.equals(tweet.createdAt) : tweet.createdAt != null) {
    return false;
  }
  if (entities != null ? !entities.equals(tweet.entities) : tweet.entities != null) {
    return false;
  }
  if (fromUser != null ? !fromUser.equals(tweet.fromUser) : tweet.fromUser != null) {
    return false;
  }
  if (inReplyToScreenName != null ? !inReplyToScreenName.equals(tweet.inReplyToScreenName) : tweet.inReplyToScreenName != null) {
    return false;
  }
  if (inReplyToStatusId != null ? !inReplyToStatusId.equals(tweet.inReplyToStatusId) : tweet.inReplyToStatusId != null) {
    return false;
  }
  if (inReplyToUserId != null ? !inReplyToUserId.equals(tweet.inReplyToUserId) : tweet.inReplyToUserId != null) {
    return false;
  }
  if (languageCode != null ? !languageCode.equals(tweet.languageCode) : tweet.languageCode != null) {
    return false;
  }
  if (profileImageUrl != null ? !profileImageUrl.equals(tweet.profileImageUrl) : tweet.profileImageUrl != null) {
    return false;
  }
  if (retweetCount != null ? !retweetCount.equals(tweet.retweetCount) : tweet.retweetCount != null) {
    return false;
  }
  if (retweetedStatus != null ? !retweetedStatus.equals(tweet.retweetedStatus) : tweet.retweetedStatus != null) {
    return false;
  }
  if (source != null ? !source.equals(tweet.source) : tweet.source != null) {
    return false;
  }
  if (text != null ? !text.equals(tweet.text) : tweet.text != null) {
    return false;
  }
  if (toUserId != null ? !toUserId.equals(tweet.toUserId) : tweet.toUserId != null) {
    return false;
  }
  if (user != null ? !user.equals(tweet.user) : tweet.user != null) {
    return false;
  }
  return true;
}

Fixed version (ground truth):
@Override public boolean equals(Object o){
  if (this == o) {
    return true;
  }
  if (o == null || getClass() != o.getClass()) {
    return false;
  }
  Tweet tweet=(Tweet)o;
  if (fromUserId != tweet.fromUserId) {
    return false;
  }
  if (id != tweet.id) {
    return false;
  }
  if (retweeted != tweet.retweeted) {
    return false;
  }
  if (createdAt != null ? !createdAt.equals(tweet.createdAt) : tweet.createdAt != null) {
    return false;
  }
  if (entities != null ? !entities.equals(tweet.entities) : tweet.entities != null) {
    return false;
  }
  if (fromUser != null ? !fromUser.equals(tweet.fromUser) : tweet.fromUser != null) {
    return false;
  }
  if (inReplyToScreenName != null ? !inReplyToScreenName.equals(tweet.inReplyToScreenName) : tweet.inReplyToScreenName != null) {
    return false;
  }
  if (inReplyToStatusId != null ? !inReplyToStatusId.equals(tweet.inReplyToStatusId) : tweet.inReplyToStatusId != null) {
    return false;
  }
  if (inReplyToUserId != null ? !inReplyToUserId.equals(tweet.inReplyToUserId) : tweet.inReplyToUserId != null) {
    return false;
  }
  if (languageCode != null ? !languageCode.equals(tweet.languageCode) : tweet.languageCode != null) {
    return false;
  }
  if (profileImageUrl != null ? !profileImageUrl.equals(tweet.profileImageUrl) : tweet.profileImageUrl != null) {
    return false;
  }
  if (retweetCount != null ? !retweetCount.equals(tweet.retweetCount) : tweet.retweetCount != null) {
    return false;
  }
  if (retweetedStatus != null ? !retweetedStatus.equals(tweet.retweetedStatus) : tweet.retweetedStatus != null) {
    return false;
  }
  if (source != null ? !source.equals(tweet.source) : tweet.source != null) {
    return false;
  }
  if (text != null ? !text.equals(tweet.text) : tweet.text != null) {
    return false;
  }
  if (toUserId != null ? !toUserId.equals(tweet.toUserId) : tweet.toUserId != null) {
    return false;
  }
  if (user != null ? !user.equals(tweet.user) : tweet.user != null) {
    return false;
  }
  return true;
}