Program: 91685
Project: 91685
Buggy source:
/** 
 * Adapts the given SQL statement from the original MS-Access dialect to the dialect of the target database. Table and column names may also be replaced.
 * @param sql  the statement in MS-Access dialect.
 * @return the SQL statement adapted to the dialect of the target database.
 */
@Override public String apply(final String sql){
  final String catalog=nonEmpty(this.catalog);
  final String schema=nonEmpty(this.schema);
  if (quote.isEmpty() && accessToAnsi.isEmpty() && schema == null && catalog == null) {
    return sql;
  }
  final StringBuilder ansi=new StringBuilder(sql.length() + 16);
  int start, end=0;
  while ((start=sql.indexOf('[',end)) >= 0) {
    ansi.append(sql,end,start);
    if ((end=sql.indexOf(']',++start)) < 0) {
      throw new IllegalArgumentException(Errors.format(Errors.Keys.MissingCharacterInElement_2,sql.substring(start),']'));
    }
    final String name=sql.substring(start,end++);
    if (CharSequences.isUpperCase(name)) {
      ansi.append(accessToAnsi.getOrDefault(name,name));
    }
 else {
      if (catalog != null) {
        ansi.append(quote).append(catalog).append(quote).append('.');
      }
      if (schema != null) {
        ansi.append(quote).append(schema).append(quote).append('.');
      }
      if (quoteTableNames) {
        ansi.append(quote);
      }
      if (schema == null) {
        ansi.append(TABLE_PREFIX);
      }
      if (quoteTableNames) {
        ansi.append(accessToAnsi.getOrDefault(name,name)).append(quote);
      }
 else {
        for (        final String word : name.split("String_Node_Str")) {
          ansi.append(accessToAnsi.getOrDefault(word,word));
        }
      }
    }
  }
  ansi.append(sql,end,sql.length());
  if (useBoolean) {
    int w=ansi.indexOf("String_Node_Str");
    if (w >= 0) {
      w+=5;
      for (      final String field : BOOLEAN_FIELDS) {
        int p=ansi.indexOf(field,w);
        if (p >= 0) {
          p+=field.length();
          if (!replaceIfEquals(ansi,p,"String_Node_Str","String_Node_Str") && !replaceIfEquals(ansi,p,"String_Node_Str","String_Node_Str")) {
            if ((p=ansi.lastIndexOf("String_Node_Str",p)) > w) {
              replaceIfEquals(ansi,p - 3,"String_Node_Str","String_Node_Str");
            }
          }
        }
      }
    }
  }
  return ansi.toString();
}

Fixed version (ground truth):
/** 
 * Adapts the given SQL statement from the original MS-Access dialect to the dialect of the target database. Table and column names may also be replaced.
 * @param sql  the statement in MS-Access dialect.
 * @return the SQL statement adapted to the dialect of the target database.
 */
@Override public String apply(final String sql){
  final String catalog=nonEmpty(this.catalog);
  final String schema=nonEmpty(this.schema);
  if (quote.isEmpty() && accessToAnsi.isEmpty() && schema == null && catalog == null) {
    return sql;
  }
  final StringBuilder ansi=new StringBuilder(sql.length() + 16);
  int start, end=0;
  while ((start=sql.indexOf('[',end)) >= 0) {
    ansi.append(sql,end,start);
    if ((end=sql.indexOf(']',++start)) < 0) {
      throw new IllegalArgumentException(Errors.format(Errors.Keys.MissingCharacterInElement_2,sql.substring(start),']'));
    }
    final String name=sql.substring(start,end++);
    if (CharSequences.isUpperCase(name)) {
      ansi.append(accessToAnsi.getOrDefault(name,name));
    }
 else {
      if (catalog != null) {
        ansi.append(quote).append(catalog).append(quote).append('.');
      }
      if (schema != null) {
        ansi.append(quote).append(schema).append(quote).append('.');
      }
      if (quoteTableNames) {
        ansi.append(quote);
      }
      if (isPrefixed) {
        ansi.append(TABLE_PREFIX);
      }
      if (quoteTableNames) {
        ansi.append(accessToAnsi.getOrDefault(name,name)).append(quote);
      }
 else {
        for (        final String word : name.split("String_Node_Str")) {
          ansi.append(accessToAnsi.getOrDefault(word,word));
        }
      }
    }
  }
  ansi.append(sql,end,sql.length());
  if (useBoolean) {
    int w=ansi.indexOf("String_Node_Str");
    if (w >= 0) {
      w+=5;
      for (      final String field : BOOLEAN_FIELDS) {
        int p=ansi.indexOf(field,w);
        if (p >= 0) {
          p+=field.length();
          if (!replaceIfEquals(ansi,p,"String_Node_Str","String_Node_Str") && !replaceIfEquals(ansi,p,"String_Node_Str","String_Node_Str")) {
            if ((p=ansi.lastIndexOf("String_Node_Str",p)) > w) {
              replaceIfEquals(ansi,p - 3,"String_Node_Str","String_Node_Str");
            }
          }
        }
      }
    }
  }
  return ansi.toString();
}