Program: 112490
Project: 112490
Buggy source:
/** 
 * Updates the slider object.
 * @param overlap true if the next object's start time has already passed
 * @param delta the delta interval since the last call
 * @param mouseX the x coordinate of the mouse
 * @param mouseY the y coordinate of the mouse
 * @return true if slider ended
 */
public boolean update(boolean overlap,int delta,int mouseX,int mouseY){
  int repeatCount=hitObject.getRepeatCount();
  if (sliderTimeTotal == 0f) {
    this.sliderTime=game.getBeatLength() * (hitObject.getPixelLength() / sliderMultiplier) / 100f;
    this.sliderTimeTotal=sliderTime * repeatCount;
    float tickLengthDiv=100f * sliderMultiplier / sliderTickRate / game.getTimingPointMultiplier();
    int tickCount=(int)Math.ceil(hitObject.getPixelLength() / tickLengthDiv) - 1;
    if (tickCount > 0) {
      this.ticksT=new float[tickCount];
      float tickTOffset=1f / (tickCount + 1);
      float t=tickTOffset;
      for (int i=0; i < tickCount; i++, t+=tickTOffset)       ticksT[i]=t;
    }
  }
  byte hitSound=hitObject.getHitSoundType();
  int trackPosition=MusicController.getPosition();
  int[] hitResultOffset=game.getHitResultOffsets();
  int lastIndex=hitObject.getSliderX().length - 1;
  boolean isAutoMod=GameMod.AUTO.isActive();
  if (!sliderClicked) {
    int time=hitObject.getTime();
    if (trackPosition > time + hitResultOffset[GameScore.HIT_50]) {
      sliderClicked=true;
      if (isAutoMod) {
        ticksHit++;
        score.sliderTickResult(time,GameScore.HIT_SLIDER30,hitObject.getX(),hitObject.getY(),hitSound);
      }
 else       score.sliderTickResult(time,GameScore.HIT_MISS,hitObject.getX(),hitObject.getY(),hitSound);
    }
 else     if (isAutoMod) {
      if (Math.abs(trackPosition - time) < hitResultOffset[GameScore.HIT_300]) {
        ticksHit++;
        sliderClicked=true;
        score.sliderTickResult(time,GameScore.HIT_SLIDER30,hitObject.getX(),hitObject.getY(),hitSound);
      }
    }
  }
  if (overlap || trackPosition > hitObject.getTime() + sliderTimeTotal) {
    tickIntervals++;
    if (isAutoMod)     ticksHit++;
 else     if (Utils.isGameKeyPressed()) {
      double distance=Math.hypot(hitObject.getSliderX()[lastIndex] - mouseX,hitObject.getSliderY()[lastIndex] - mouseY);
      int followCircleRadius=GameImage.SLIDER_FOLLOWCIRCLE.getImage().getWidth() / 2;
      if (distance < followCircleRadius)       ticksHit++;
    }
    hitResult();
    return true;
  }
  boolean isNewRepeat=false;
  if (repeatCount - 1 > currentRepeats) {
    float t=getT(trackPosition,true);
    if (Math.floor(t) > currentRepeats) {
      currentRepeats++;
      tickIntervals++;
      isNewRepeat=true;
    }
  }
  boolean isNewTick=false;
  if (ticksT != null && tickIntervals < (ticksT.length * (currentRepeats + 1)) + repeatCount && tickIntervals < (ticksT.length * repeatCount) + repeatCount) {
    float t=getT(trackPosition,true);
    if (t - Math.floor(t) >= ticksT[tickIndex]) {
      tickIntervals++;
      tickIndex=(tickIndex + 1) % ticksT.length;
      isNewTick=true;
    }
  }
  float[] c=bezier.pointAt(getT(trackPosition,false));
  double distance=Math.hypot(c[0] - mouseX,c[1] - mouseY);
  int followCircleRadius=GameImage.SLIDER_FOLLOWCIRCLE.getImage().getWidth() / 2;
  if ((Utils.isGameKeyPressed() && distance < followCircleRadius) || isAutoMod) {
    followCircleActive=true;
    score.changeHealth(delta * GameScore.HP_DRAIN_MULTIPLIER);
    if (isNewRepeat) {
      ticksHit++;
      if (currentRepeats % 2 > 0)       score.sliderTickResult(trackPosition,GameScore.HIT_SLIDER30,hitObject.getSliderX()[lastIndex],hitObject.getSliderY()[lastIndex],hitSound);
 else       score.sliderTickResult(trackPosition,GameScore.HIT_SLIDER30,c[0],c[1],hitSound);
    }
    if (isNewTick) {
      ticksHit++;
      score.sliderTickResult(trackPosition,GameScore.HIT_SLIDER10,c[0],c[1],(byte)-1);
    }
  }
 else {
    followCircleActive=false;
    if (isNewRepeat)     score.sliderTickResult(trackPosition,GameScore.HIT_MISS,0,0,hitSound);
    if (isNewTick)     score.sliderTickResult(trackPosition,GameScore.HIT_MISS,0,0,(byte)-1);
  }
  return false;
}

Fixed version (ground truth):
/** 
 * Updates the slider object.
 * @param overlap true if the next object's start time has already passed
 * @param delta the delta interval since the last call
 * @param mouseX the x coordinate of the mouse
 * @param mouseY the y coordinate of the mouse
 * @return true if slider ended
 */
public boolean update(boolean overlap,int delta,int mouseX,int mouseY){
  int repeatCount=hitObject.getRepeatCount();
  if (sliderTimeTotal == 0f) {
    this.sliderTime=game.getBeatLength() * (hitObject.getPixelLength() / sliderMultiplier) / 100f;
    this.sliderTimeTotal=sliderTime * repeatCount;
    float tickLengthDiv=100f * sliderMultiplier / sliderTickRate / game.getTimingPointMultiplier();
    int tickCount=(int)Math.ceil(hitObject.getPixelLength() / tickLengthDiv) - 1;
    if (tickCount > 0) {
      this.ticksT=new float[tickCount];
      float tickTOffset=1f / (tickCount + 1);
      float t=tickTOffset;
      for (int i=0; i < tickCount; i++, t+=tickTOffset)       ticksT[i]=t;
    }
  }
  byte hitSound=hitObject.getHitSoundType();
  int trackPosition=MusicController.getPosition();
  int[] hitResultOffset=game.getHitResultOffsets();
  int lastIndex=hitObject.getSliderX().length - 1;
  boolean isAutoMod=GameMod.AUTO.isActive();
  if (!sliderClicked) {
    int time=hitObject.getTime();
    if (trackPosition > time + hitResultOffset[GameScore.HIT_50]) {
      sliderClicked=true;
      if (isAutoMod) {
        ticksHit++;
        score.sliderTickResult(time,GameScore.HIT_SLIDER30,hitObject.getX(),hitObject.getY(),hitSound);
      }
 else       score.sliderTickResult(time,GameScore.HIT_MISS,hitObject.getX(),hitObject.getY(),hitSound);
    }
 else     if (isAutoMod) {
      if (Math.abs(trackPosition - time) < hitResultOffset[GameScore.HIT_300]) {
        ticksHit++;
        sliderClicked=true;
        score.sliderTickResult(time,GameScore.HIT_SLIDER30,hitObject.getX(),hitObject.getY(),hitSound);
      }
    }
  }
  if (overlap || trackPosition > hitObject.getTime() + sliderTimeTotal) {
    tickIntervals++;
    if (isAutoMod)     ticksHit++;
 else     if (Utils.isGameKeyPressed()) {
      float[] c=bezier.pointAt(getT(trackPosition,false));
      double distance=Math.hypot(c[0] - mouseX,c[1] - mouseY);
      int followCircleRadius=GameImage.SLIDER_FOLLOWCIRCLE.getImage().getWidth() / 2;
      if (distance < followCircleRadius)       ticksHit++;
    }
    hitResult();
    return true;
  }
  boolean isNewRepeat=false;
  if (repeatCount - 1 > currentRepeats) {
    float t=getT(trackPosition,true);
    if (Math.floor(t) > currentRepeats) {
      currentRepeats++;
      tickIntervals++;
      isNewRepeat=true;
    }
  }
  boolean isNewTick=false;
  if (ticksT != null && tickIntervals < (ticksT.length * (currentRepeats + 1)) + repeatCount && tickIntervals < (ticksT.length * repeatCount) + repeatCount) {
    float t=getT(trackPosition,true);
    if (t - Math.floor(t) >= ticksT[tickIndex]) {
      tickIntervals++;
      tickIndex=(tickIndex + 1) % ticksT.length;
      isNewTick=true;
    }
  }
  float[] c=bezier.pointAt(getT(trackPosition,false));
  double distance=Math.hypot(c[0] - mouseX,c[1] - mouseY);
  int followCircleRadius=GameImage.SLIDER_FOLLOWCIRCLE.getImage().getWidth() / 2;
  if ((Utils.isGameKeyPressed() && distance < followCircleRadius) || isAutoMod) {
    followCircleActive=true;
    score.changeHealth(delta * GameScore.HP_DRAIN_MULTIPLIER);
    if (isNewRepeat) {
      ticksHit++;
      if (currentRepeats % 2 > 0)       score.sliderTickResult(trackPosition,GameScore.HIT_SLIDER30,hitObject.getSliderX()[lastIndex],hitObject.getSliderY()[lastIndex],hitSound);
 else       score.sliderTickResult(trackPosition,GameScore.HIT_SLIDER30,c[0],c[1],hitSound);
    }
    if (isNewTick) {
      ticksHit++;
      score.sliderTickResult(trackPosition,GameScore.HIT_SLIDER10,c[0],c[1],(byte)-1);
    }
  }
 else {
    followCircleActive=false;
    if (isNewRepeat)     score.sliderTickResult(trackPosition,GameScore.HIT_MISS,0,0,(byte)-1);
    if (isNewTick)     score.sliderTickResult(trackPosition,GameScore.HIT_MISS,0,0,(byte)-1);
  }
  return false;
}