#vulnerable code 
                              @Override
  public int read() throws IOException {
    final int result;
    if (this.bitsInBuffer == 0) {
      result = this.readByteFromStream();
      if (result < 0) {
        return result;
      }
      return result;
    }
    else {
      return this.readBits(JBBPBitNumber.BITS_8);
    }
  } 
                            #location 5 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                              @Override
  public int read() throws IOException {
    final int result;
    if (this.bitsInBuffer == 0) {
      result = this.readByteFromStream();
      if (result >= 0) {
        this.byteCounter++;
      }
      return result;
    }
    else {
      return this.readBits(JBBPBitNumber.BITS_8);
    }
  }