Program: 151738
Project: 151738
Buggy source:
/** 
 * Method called to parse the next token when we don't have any type information, so that all tokens are exposed as basic String values.
 * @return Column value if more found; null to indicate end of lineof input
 */
public String nextString() throws IOException, JsonParseException {
  _numTypesValid=NR_UNKNOWN;
  if (_pendingLF > 0) {
    if (_inputSource != null) {
      _handleLF();
    }
    return null;
  }
  int i;
  if (_trimSpaces) {
    i=_skipLeadingSpace();
  }
 else {
    i=_nextChar();
  }
  if (i < 0) {
    return "String_Node_Str";
  }
  if (i == INT_CR || i == INT_LF) {
    _pendingLF=i;
    return "String_Node_Str";
  }
  if (i == _quoteChar) {
    return _nextQuotedString();
  }
  if (i == _separatorChar) {
    _textBuffer.resetWithString("String_Node_Str");
    return "String_Node_Str";
  }
  char[] outBuf=_textBuffer.emptyAndGetCurrentSegment();
  outBuf[0]=(char)i;
  int outPtr=1;
  int ptr=_inputPtr;
  if (ptr >= _inputEnd) {
    if (!loadMore()) {
      return _textBuffer.finishAndReturn(outPtr,_trimSpaces);
    }
    ptr=_inputPtr;
  }
  final int end;
{
    int max=Math.min(_inputEnd - ptr,outBuf.length - outPtr);
    end=ptr + max;
  }
  char[] inputBuffer=_inputBuffer;
  while (ptr < end) {
    char c=inputBuffer[ptr++];
    if (c <= _maxSpecialChar) {
      if (c == _separatorChar) {
        _inputPtr=ptr;
        return _textBuffer.finishAndReturn(outPtr,_trimSpaces);
      }
      if (c == '\r' || c == '\n') {
        _pendingLF=c;
        _inputPtr=ptr;
        return _textBuffer.finishAndReturn(outPtr,_trimSpaces);
      }
      if (c == _escapeChar) {
        --ptr;
        break;
      }
    }
    outBuf[outPtr++]=(char)c;
  }
  _inputPtr=ptr;
  return _nextUnquotedString(outBuf,outPtr);
}

Fixed version (ground truth):
/** 
 * Method called to parse the next token when we don't have any type information, so that all tokens are exposed as basic String values.
 * @return Column value if more found; null to indicate end of lineof input
 */
public String nextString() throws IOException, JsonParseException {
  _numTypesValid=NR_UNKNOWN;
  if (_pendingLF > 0) {
    if (_inputSource != null) {
      _handleLF();
    }
    return null;
  }
  int i;
  _tokenInputTotal=_currInputProcessed + _inputPtr - 1;
  _tokenInputRow=_currInputRow;
  _tokenInputCol=_inputPtr - _currInputRowStart - 1;
  if (_trimSpaces) {
    i=_skipLeadingSpace();
  }
 else {
    i=_nextChar();
  }
  if (i < 0) {
    return "String_Node_Str";
  }
  if (i == INT_CR || i == INT_LF) {
    _pendingLF=i;
    return "String_Node_Str";
  }
  if (i == _quoteChar) {
    return _nextQuotedString();
  }
  if (i == _separatorChar) {
    _textBuffer.resetWithString("String_Node_Str");
    return "String_Node_Str";
  }
  char[] outBuf=_textBuffer.emptyAndGetCurrentSegment();
  outBuf[0]=(char)i;
  int outPtr=1;
  int ptr=_inputPtr;
  if (ptr >= _inputEnd) {
    if (!loadMore()) {
      return _textBuffer.finishAndReturn(outPtr,_trimSpaces);
    }
    ptr=_inputPtr;
  }
  final int end;
{
    int max=Math.min(_inputEnd - ptr,outBuf.length - outPtr);
    end=ptr + max;
  }
  char[] inputBuffer=_inputBuffer;
  while (ptr < end) {
    char c=inputBuffer[ptr++];
    if (c <= _maxSpecialChar) {
      if (c == _separatorChar) {
        _inputPtr=ptr;
        return _textBuffer.finishAndReturn(outPtr,_trimSpaces);
      }
      if (c == '\r' || c == '\n') {
        _pendingLF=c;
        _inputPtr=ptr;
        return _textBuffer.finishAndReturn(outPtr,_trimSpaces);
      }
      if (c == _escapeChar) {
        --ptr;
        break;
      }
    }
    outBuf[outPtr++]=(char)c;
  }
  _inputPtr=ptr;
  return _nextUnquotedString(outBuf,outPtr);
}