Program: 62111
Project: 62111
Buggy source:
public static String convertSoundLayer(int layerIndex,String backgroundColor,HashMap<Integer,CharacterTag> characters,List<Tag> tags,List<Tag> timeLineTags){
  String ret="String_Node_Str";
  StartSoundTag lastStartSound=null;
  SoundStreamHeadTypeTag lastSoundStreamHead=null;
  StartSoundTag startSound=null;
  SoundStreamHeadTypeTag soundStreamHead=null;
  int duration=1;
  int frame=0;
  for (  Tag t : timeLineTags) {
    if (t instanceof StartSoundTag) {
      startSound=(StartSoundTag)t;
    }
    if (t instanceof SoundStreamHeadTypeTag) {
      soundStreamHead=(SoundStreamHeadTypeTag)t;
    }
    if (t instanceof ShowFrameTag) {
      if (soundStreamHead != null || startSound != null) {
        if (lastSoundStreamHead != null || lastStartSound != null) {
          ret+=convertFrame(false,characters,tags,lastSoundStreamHead,lastStartSound,frame,null,false,duration,"String_Node_Str","String_Node_Str");
        }
        frame+=duration;
        duration=1;
        lastSoundStreamHead=soundStreamHead;
        lastStartSound=startSound;
        soundStreamHead=null;
        startSound=null;
      }
 else {
        duration++;
      }
    }
  }
  if (lastSoundStreamHead != null || lastStartSound != null) {
    if (frame < 0) {
      frame=0;
      duration=1;
    }
    ret+=convertFrame(false,characters,tags,lastSoundStreamHead,lastStartSound,frame,null,false,duration,"String_Node_Str","String_Node_Str");
  }
  if (!ret.equals("String_Node_Str")) {
    ret="String_Node_Str" + layerIndex + "String_Node_Str"+ backgroundColor+ "String_Node_Str"+ "String_Node_Str"+ ret+ "String_Node_Str"+ "String_Node_Str";
  }
  return ret;
}

Fixed version (ground truth):
public static String convertSoundLayer(int layerIndex,String backgroundColor,HashMap<Integer,CharacterTag> characters,List<Tag> tags,List<Tag> timeLineTags){
  String ret="String_Node_Str";
  StartSoundTag lastStartSound=null;
  SoundStreamHeadTypeTag lastSoundStreamHead=null;
  StartSoundTag startSound=null;
  SoundStreamHeadTypeTag soundStreamHead=null;
  int duration=1;
  int frame=0;
  for (  Tag t : timeLineTags) {
    if (t instanceof StartSoundTag) {
      startSound=(StartSoundTag)t;
    }
    if (t instanceof SoundStreamHeadTypeTag) {
      soundStreamHead=(SoundStreamHeadTypeTag)t;
    }
    if (t instanceof ShowFrameTag) {
      if (soundStreamHead != null || startSound != null) {
        if (lastSoundStreamHead != null || lastStartSound != null) {
          ret+=convertFrame(false,characters,tags,lastSoundStreamHead,lastStartSound,frame,null,false,duration,"String_Node_Str","String_Node_Str");
        }
        frame+=duration;
        duration=1;
        lastSoundStreamHead=soundStreamHead;
        lastStartSound=startSound;
        soundStreamHead=null;
        startSound=null;
      }
 else {
        duration++;
      }
    }
  }
  if (lastSoundStreamHead != null || lastStartSound != null) {
    if (frame < 0) {
      frame=0;
      duration=1;
    }
    ret+=convertFrame(false,characters,tags,lastSoundStreamHead,lastStartSound,frame,null,false,duration,"String_Node_Str","String_Node_Str");
  }
  if (!ret.equals("String_Node_Str")) {
    ret="String_Node_Str" + layerIndex + "String_Node_Str"+ randomOutlineColor()+ "String_Node_Str"+ "String_Node_Str"+ ret+ "String_Node_Str"+ "String_Node_Str";
  }
  return ret;
}