Program: 154049
Project: 154049
Buggy source:
public synchronized void decodeT6(byte[] buffer,byte[] compData,int startX,int height,long tiffT6Options){
  this.data=compData;
  compression=4;
  bitPointer=0;
  bytePointer=0;
  int scanlineStride=(w + 7) / 8;
  int bufferOffset=0;
  int a0, a1, b1, b2;
  int entry, code, bits;
  byte color;
  boolean isWhite;
  int currIndex;
  int temp[];
  int[] b=new int[2];
  uncompressedMode=(int)((tiffT6Options & 0x02) >> 1);
  int[] cce=currChangingElems;
  changingElemSize=0;
  cce[changingElemSize++]=w;
  cce[changingElemSize++]=w;
  int lineOffset=0;
  int bitOffset;
  for (int lines=0; lines < height; lines++) {
    a0=-1;
    isWhite=true;
    temp=prevChangingElems;
    prevChangingElems=currChangingElems;
    cce=currChangingElems=temp;
    currIndex=0;
    bitOffset=startX;
    lastChangingElement=0;
    while (bitOffset < w) {
      getNextChangingElement(a0,isWhite,b);
      b1=b[0];
      b2=b[1];
      entry=nextLesserThan8Bits(7);
      entry=(int)(twoDCodes[entry] & 0xff);
      code=(entry & 0x78) >>> 3;
      bits=entry & 0x07;
      if (code == 0) {
        if (!isWhite) {
          if (b2 > w) {
            b2=w;
          }
          setToBlack(buffer,lineOffset,bitOffset,b2 - bitOffset);
        }
        bitOffset=a0=b2;
        updatePointer(7 - bits);
      }
 else       if (code == 1) {
        updatePointer(7 - bits);
        int number;
        if (isWhite) {
          number=decodeWhiteCodeWord();
          bitOffset+=number;
          cce[currIndex++]=bitOffset;
          number=decodeBlackCodeWord();
          if (number > w - bitOffset) {
            number=w - bitOffset;
          }
          setToBlack(buffer,lineOffset,bitOffset,number);
          bitOffset+=number;
          cce[currIndex++]=bitOffset;
        }
 else {
          number=decodeBlackCodeWord();
          if (number > w - bitOffset) {
            number=w - bitOffset;
          }
          setToBlack(buffer,lineOffset,bitOffset,number);
          bitOffset+=number;
          cce[currIndex++]=bitOffset;
          number=decodeWhiteCodeWord();
          bitOffset+=number;
          cce[currIndex++]=bitOffset;
        }
        a0=bitOffset;
      }
 else       if (code <= 8) {
        a1=b1 + (code - 5);
        cce[currIndex++]=a1;
        if (!isWhite) {
          if (a1 > w) {
            a1=w;
          }
          setToBlack(buffer,lineOffset,bitOffset,a1 - bitOffset);
        }
        bitOffset=a0=a1;
        isWhite=!isWhite;
        updatePointer(7 - bits);
      }
 else       if (code == 11) {
        if (nextLesserThan8Bits(3) != 7) {
          throw new Error(JaiI18N.getString("String_Node_Str"));
        }
        int zeros=0;
        boolean exit=false;
        while (!exit) {
          while (nextLesserThan8Bits(1) != 1) {
            zeros++;
          }
          if (zeros > 5) {
            zeros=zeros - 6;
            if (!isWhite && (zeros > 0)) {
              cce[currIndex++]=bitOffset;
            }
            bitOffset+=zeros;
            if (zeros > 0) {
              isWhite=true;
            }
            if (nextLesserThan8Bits(1) == 0) {
              if (!isWhite) {
                cce[currIndex++]=bitOffset;
              }
              isWhite=true;
            }
 else {
              if (isWhite) {
                cce[currIndex++]=bitOffset;
              }
              isWhite=false;
            }
            exit=true;
          }
          if (zeros == 5) {
            if (!isWhite) {
              cce[currIndex++]=bitOffset;
            }
            bitOffset+=zeros;
            isWhite=true;
          }
 else {
            bitOffset+=zeros;
            cce[currIndex++]=bitOffset;
            setToBlack(buffer,lineOffset,bitOffset,1);
            ++bitOffset;
            isWhite=false;
          }
        }
      }
 else {
        throw new Error(JaiI18N.getString("String_Node_Str"));
      }
    }
    if (currIndex <= w)     cce[currIndex++]=bitOffset;
    changingElemSize=currIndex;
    lineOffset+=scanlineStride;
  }
}

Fixed version (ground truth):
public synchronized void decodeT6(byte[] buffer,byte[] compData,int startX,int height,long tiffT6Options){
  this.data=compData;
  compression=4;
  bitPointer=0;
  bytePointer=0;
  int scanlineStride=(w + 7) / 8;
  int bufferOffset=0;
  int a0, a1, b1, b2;
  int entry, code, bits;
  byte color;
  boolean isWhite;
  int currIndex;
  int temp[];
  int[] b=new int[2];
  uncompressedMode=(int)((tiffT6Options & 0x02) >> 1);
  int[] cce=currChangingElems;
  changingElemSize=0;
  cce[changingElemSize++]=w;
  cce[changingElemSize++]=w;
  int lineOffset=0;
  int bitOffset;
  for (int lines=0; lines < height; lines++) {
    a0=-1;
    isWhite=true;
    temp=prevChangingElems;
    prevChangingElems=currChangingElems;
    cce=currChangingElems=temp;
    currIndex=0;
    bitOffset=startX;
    lastChangingElement=0;
    while (bitOffset < w) {
      getNextChangingElement(a0,isWhite,b);
      b1=b[0];
      b2=b[1];
      entry=nextLesserThan8Bits(7);
      entry=(int)(twoDCodes[entry] & 0xff);
      code=(entry & 0x78) >>> 3;
      bits=entry & 0x07;
      if (code == 0) {
        if (!isWhite) {
          if (b2 > w) {
            b2=w;
          }
          setToBlack(buffer,lineOffset,bitOffset,b2 - bitOffset);
        }
        bitOffset=a0=b2;
        updatePointer(7 - bits);
      }
 else       if (code == 1) {
        updatePointer(7 - bits);
        int number;
        if (isWhite) {
          number=decodeWhiteCodeWord();
          bitOffset+=number;
          cce[currIndex++]=bitOffset;
          number=decodeBlackCodeWord();
          if (number > w - bitOffset) {
            number=w - bitOffset;
          }
          setToBlack(buffer,lineOffset,bitOffset,number);
          bitOffset+=number;
          cce[currIndex++]=bitOffset;
        }
 else {
          number=decodeBlackCodeWord();
          if (number > w - bitOffset) {
            number=w - bitOffset;
          }
          setToBlack(buffer,lineOffset,bitOffset,number);
          bitOffset+=number;
          cce[currIndex++]=bitOffset;
          number=decodeWhiteCodeWord();
          bitOffset+=number;
          cce[currIndex++]=bitOffset;
        }
        a0=bitOffset;
      }
 else       if (code <= 8) {
        a1=b1 + (code - 5);
        cce[currIndex++]=a1;
        if (!isWhite) {
          if (a1 > w) {
            a1=w;
          }
          setToBlack(buffer,lineOffset,bitOffset,a1 - bitOffset);
        }
        bitOffset=a0=a1;
        isWhite=!isWhite;
        updatePointer(7 - bits);
      }
 else       if (code == 11) {
        if (nextLesserThan8Bits(3) != 7) {
          throw new RuntimeException(JaiI18N.getString("String_Node_Str"));
        }
        int zeros=0;
        boolean exit=false;
        while (!exit) {
          while (nextLesserThan8Bits(1) != 1) {
            zeros++;
          }
          if (zeros > 5) {
            zeros=zeros - 6;
            if (!isWhite && (zeros > 0)) {
              cce[currIndex++]=bitOffset;
            }
            bitOffset+=zeros;
            if (zeros > 0) {
              isWhite=true;
            }
            if (nextLesserThan8Bits(1) == 0) {
              if (!isWhite) {
                cce[currIndex++]=bitOffset;
              }
              isWhite=true;
            }
 else {
              if (isWhite) {
                cce[currIndex++]=bitOffset;
              }
              isWhite=false;
            }
            exit=true;
          }
          if (zeros == 5) {
            if (!isWhite) {
              cce[currIndex++]=bitOffset;
            }
            bitOffset+=zeros;
            isWhite=true;
          }
 else {
            bitOffset+=zeros;
            cce[currIndex++]=bitOffset;
            setToBlack(buffer,lineOffset,bitOffset,1);
            ++bitOffset;
            isWhite=false;
          }
        }
      }
 else {
        throw new RuntimeException(JaiI18N.getString("String_Node_Str"));
      }
    }
    if (currIndex <= w)     cce[currIndex++]=bitOffset;
    changingElemSize=currIndex;
    lineOffset+=scanlineStride;
  }
}