Program: 163352
Project: 163352
Buggy source:
private void parseQuotedValue(char prev){
  if (prev != '\0' && parseUnescapedQuotesUntilDelimiter) {
    if (quoteHandling == SKIP_VALUE) {
      skipValue();
      return;
    }
    output.appender.prepend(quote);
    ch=input.nextChar();
    output.trim=ignoreTrailingWhitespace;
    ch=input.appendUntilDelimiter(ch,output.appender);
    return;
  }
 else {
    while (true) {
      ch=input.nextChar();
      if (prev == quote && (ch <= ' ' || ch == delimiter || ch == newLine)) {
        break;
      }
      if (ch != quote && ch != quoteEscape) {
        if (prev == quote) {
          if (handleUnescapedQuote()) {
            break;
          }
 else {
            return;
          }
        }
        ch=input.appendUtilAnyEscape(ch,output.appender);
      }
 else       if (ch == quoteEscape && prev == escapeEscape && escapeEscape != '\0') {
        if (keepEscape) {
          output.appender.append(escapeEscape);
        }
        output.appender.append(quoteEscape);
        ch='\0';
      }
 else       if (prev == quoteEscape) {
        if (ch == quote) {
          if (keepEscape) {
            output.appender.append(quoteEscape);
          }
          output.appender.append(quote);
          ch='\0';
        }
 else {
          output.appender.append(prev);
        }
      }
 else       if (ch == quote && prev == quote) {
        output.appender.append(quote);
      }
      prev=ch;
    }
    if (ch != delimiter && ch != newLine && ch <= ' ') {
      whitespaceAppender.reset();
      do {
        whitespaceAppender.append(ch);
        ch=input.nextChar();
        if (ch == newLine) {
          return;
        }
      }
 while (ch <= ' ');
      if (ch != delimiter && parseUnescapedQuotes) {
        if (output.appender instanceof DefaultCharAppender) {
          output.appender.append(quote);
          ((DefaultCharAppender)output.appender).append(whitespaceAppender);
        }
        if (ch != quote && ch != quoteEscape) {
          output.appender.append(ch);
        }
        parseQuotedValue(ch);
      }
    }
    if (ch != delimiter && ch != newLine) {
      throw new TextParsingException(context,"String_Node_Str" + ch + "String_Node_Str"+ delimiter+ "String_Node_Str");
    }
  }
}

Fixed version (ground truth):
private void parseQuotedValue(){
  if (prev != '\0' && parseUnescapedQuotesUntilDelimiter) {
    if (quoteHandling == SKIP_VALUE) {
      skipValue();
      return;
    }
    output.appender.prepend(quote);
    ch=input.nextChar();
    output.trim=ignoreTrailingWhitespace;
    ch=input.appendUntilDelimiter(ch,output.appender);
    return;
  }
 else {
    while (true) {
      ch=input.nextChar();
      if (prev == quote && (ch <= ' ' || ch == delimiter || ch == newLine)) {
        break;
      }
      if (ch != quote && ch != quoteEscape) {
        if (prev == quote) {
          if (handleUnescapedQuote()) {
            break;
          }
 else {
            return;
          }
        }
        ch=input.appendUtilAnyEscape(ch,output.appender);
      }
 else       if (ch == quoteEscape && prev == escapeEscape && escapeEscape != '\0') {
        if (keepEscape) {
          output.appender.append(escapeEscape);
        }
        output.appender.append(quoteEscape);
        ch='\0';
      }
 else       if (prev == quoteEscape) {
        if (ch == quote) {
          if (keepEscape) {
            output.appender.append(quoteEscape);
          }
          output.appender.append(quote);
          ch='\0';
        }
 else {
          output.appender.append(prev);
        }
      }
 else       if (ch == quote && prev == quote) {
        output.appender.append(quote);
      }
      prev=ch;
    }
    if (ch != delimiter && ch != newLine && ch <= ' ') {
      whitespaceAppender.reset();
      do {
        whitespaceAppender.append(ch);
        ch=input.nextChar();
        if (ch == newLine) {
          return;
        }
      }
 while (ch <= ' ');
      if (ch != delimiter && parseUnescapedQuotes) {
        if (output.appender instanceof DefaultCharAppender) {
          output.appender.append(quote);
          ((DefaultCharAppender)output.appender).append(whitespaceAppender);
        }
        if (ch != quote && ch != quoteEscape) {
          output.appender.append(ch);
        }
        prev=ch;
        parseQuotedValue();
      }
    }
    if (ch != delimiter && ch != newLine) {
      throw new TextParsingException(context,"String_Node_Str" + ch + "String_Node_Str"+ delimiter+ "String_Node_Str");
    }
  }
}