Program: 154043
Project: 154043
Buggy source:
public void decode2D(byte[] buffer,byte compData[],int startX,int height,long tiffT4Options){
  this.data=compData;
  compression=3;
  bitPointer=0;
  bytePointer=0;
  int scanlineStride=(w + 7) / 8;
  int a0, a1, b1, b2;
  int[] b=new int[2];
  int entry, code, bits, color;
  boolean isWhite;
  int currIndex=0;
  int temp[];
  oneD=(int)(tiffT4Options & 0x01);
  uncompressedMode=(int)((tiffT4Options & 0x02) >> 1);
  fillBits=(int)((tiffT4Options & 0x04) >> 2);
  if (readEOL(true) != 1) {
    throw new Error(JaiI18N.getString("String_Node_Str"));
  }
  int lineOffset=0;
  int bitOffset;
  decodeNextScanline(buffer,lineOffset,startX);
  lineOffset+=scanlineStride;
  for (int lines=1; lines < height; lines++) {
    if (readEOL(false) == 0) {
      temp=prevChangingElems;
      prevChangingElems=currChangingElems;
      currChangingElems=temp;
      currIndex=0;
      a0=-1;
      isWhite=true;
      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) {
            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;
            currChangingElems[currIndex++]=bitOffset;
            number=decodeBlackCodeWord();
            setToBlack(buffer,lineOffset,bitOffset,number);
            bitOffset+=number;
            currChangingElems[currIndex++]=bitOffset;
          }
 else {
            number=decodeBlackCodeWord();
            setToBlack(buffer,lineOffset,bitOffset,number);
            bitOffset+=number;
            currChangingElems[currIndex++]=bitOffset;
            number=decodeWhiteCodeWord();
            bitOffset+=number;
            currChangingElems[currIndex++]=bitOffset;
          }
          a0=bitOffset;
        }
 else         if (code <= 8) {
          a1=b1 + (code - 5);
          currChangingElems[currIndex++]=a1;
          if (!isWhite) {
            setToBlack(buffer,lineOffset,bitOffset,a1 - bitOffset);
          }
          bitOffset=a0=a1;
          isWhite=!isWhite;
          updatePointer(7 - bits);
        }
 else {
          throw new Error(JaiI18N.getString("String_Node_Str"));
        }
      }
      currChangingElems[currIndex++]=bitOffset;
      changingElemSize=currIndex;
    }
 else {
      decodeNextScanline(buffer,lineOffset,startX);
    }
    lineOffset+=scanlineStride;
  }
}

Fixed version (ground truth):
public void decode2D(byte[] buffer,byte compData[],int startX,int height,long tiffT4Options){
  this.data=compData;
  compression=3;
  bitPointer=0;
  bytePointer=0;
  int scanlineStride=(w + 7) / 8;
  int a0, a1, b1, b2;
  int[] b=new int[2];
  int entry, code, bits, color;
  boolean isWhite;
  int currIndex=0;
  int temp[];
  oneD=(int)(tiffT4Options & 0x01);
  uncompressedMode=(int)((tiffT4Options & 0x02) >> 1);
  fillBits=(int)((tiffT4Options & 0x04) >> 2);
  if (readEOL(true) != 1) {
    throw new RuntimeException(JaiI18N.getString("String_Node_Str"));
  }
  int lineOffset=0;
  int bitOffset;
  decodeNextScanline(buffer,lineOffset,startX);
  lineOffset+=scanlineStride;
  for (int lines=1; lines < height; lines++) {
    if (readEOL(false) == 0) {
      temp=prevChangingElems;
      prevChangingElems=currChangingElems;
      currChangingElems=temp;
      currIndex=0;
      a0=-1;
      isWhite=true;
      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) {
            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;
            currChangingElems[currIndex++]=bitOffset;
            number=decodeBlackCodeWord();
            setToBlack(buffer,lineOffset,bitOffset,number);
            bitOffset+=number;
            currChangingElems[currIndex++]=bitOffset;
          }
 else {
            number=decodeBlackCodeWord();
            setToBlack(buffer,lineOffset,bitOffset,number);
            bitOffset+=number;
            currChangingElems[currIndex++]=bitOffset;
            number=decodeWhiteCodeWord();
            bitOffset+=number;
            currChangingElems[currIndex++]=bitOffset;
          }
          a0=bitOffset;
        }
 else         if (code <= 8) {
          a1=b1 + (code - 5);
          currChangingElems[currIndex++]=a1;
          if (!isWhite) {
            setToBlack(buffer,lineOffset,bitOffset,a1 - bitOffset);
          }
          bitOffset=a0=a1;
          isWhite=!isWhite;
          updatePointer(7 - bits);
        }
 else {
          throw new RuntimeException(JaiI18N.getString("String_Node_Str"));
        }
      }
      currChangingElems[currIndex++]=bitOffset;
      changingElemSize=currIndex;
    }
 else {
      decodeNextScanline(buffer,lineOffset,startX);
    }
    lineOffset+=scanlineStride;
  }
}