output: #fixed code
                                public int readBits(final JBBPBitNumber numOfBitsToRead) throws IOException {
      int result;
  
      final int numOfBitsAsNumber = numOfBitsToRead.getBitNumber();
  
      if (this.bitsInBuffer == 0 && numOfBitsAsNumber == 8) {
        result = this.readByteFromStream();
        this.byteCounter++;
        return result;
      }
      else {
        result = 0;
  
        if (numOfBitsAsNumber == this.bitsInBuffer) {
          result = this.bitBuffer;
          this.bitBuffer = 0;
          this.bitsInBuffer = 0;
          if (numOfBitsAsNumber == 8) {
            this.byteCounter++;
          }
          return result;
        }
  
        int i = numOfBitsAsNumber;
        int theBitBuffer = this.bitBuffer;
        int theBitBufferCounter = this.bitsInBuffer;
  
        while (i > 0) {
          if (theBitBufferCounter == 0) {
            final int nextByte = this.readByteFromStream();
            if (nextByte < 0) {
              if (i == numOfBitsAsNumber) {
                return nextByte;
              }
              else {
                break;
              }
            }
            else {
              theBitBuffer = nextByte;
              theBitBufferCounter = 8;
              this.byteCounter++;
            }
          }
  
          result = (result << 1) | (theBitBuffer & 1);
          theBitBuffer >>= 1;
          theBitBufferCounter--;
          i--;
        }
  
        this.bitBuffer = theBitBuffer;
        this.bitsInBuffer = theBitBufferCounter;
  
        return (JBBPUtils.reverseByte((byte) result) & 0xFF) >> (8 - (numOfBitsAsNumber - i));
      }
    }
input: #vulnerable code 
                                public int readBits(final JBBPBitNumber numOfBitsToRead) throws IOException {
      int result;
  
      final int numOfBitsAsNumber = numOfBitsToRead.getBitNumber();
  
      if (this.bitsInBuffer == 0 && numOfBitsAsNumber == 8) {
        result = this.readByteFromStream();
        return result;
      }
      else {
        result = 0;
        
        if (numOfBitsAsNumber == this.bitsInBuffer){
          result = this.bitBuffer;
          this.bitBuffer = 0;
          this.bitsInBuffer = 0;
          return result;
        }
        
        int i = numOfBitsAsNumber;
        int theBitBuffer = this.bitBuffer;
        int theBitBufferCounter = this.bitsInBuffer;
  
        while (i > 0) {
          if (theBitBufferCounter == 0) {
            final int nextByte = this.readByteFromStream();
            if (nextByte < 0) {
              if (i == numOfBitsAsNumber) {
                return nextByte;
              }
              else {
                break;
              }
            }
            else {
              theBitBuffer = nextByte;
              theBitBufferCounter = 8;
            }
          }
  
          result = (result << 1) | (theBitBuffer & 1);
          theBitBuffer >>= 1;
          theBitBufferCounter--;
          i--;
        }
  
        this.bitBuffer = theBitBuffer;
        this.bitsInBuffer = theBitBufferCounter;
  
        return (JBBPUtils.reverseByte((byte) result) & 0xFF) >> (8 - (numOfBitsAsNumber - i));
      }
    } 
                              #location 7 
                              #vulnerability type THREAD_SAFETY_VIOLATION