Program: 61453
Project: 61453
Buggy source:
private static void convertSoundLayer(int layerIndex,String backgroundColor,HashMap<Integer,CharacterTag> characters,ReadOnlyTagList tags,ReadOnlyTagList timeLineTags,HashMap<String,byte[]> files,StringBuilder ret){
  StringBuilder ret2=new StringBuilder();
  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;
      for (      Tag ta : tags) {
        if (ta instanceof DefineSoundTag) {
          DefineSoundTag s=(DefineSoundTag)ta;
          if (s.soundId == startSound.soundId) {
            if (!files.containsKey("String_Node_Str" + s.soundId + "String_Node_Str"+ s.getExportFormat().toString().toLowerCase())) {
              startSound=null;
            }
            break;
          }
        }
      }
    }
    if (t instanceof SoundStreamHeadTypeTag) {
      soundStreamHead=(SoundStreamHeadTypeTag)t;
      if (!files.containsKey("String_Node_Str" + soundStreamHead.getCharacterId() + "String_Node_Str"+ soundStreamHead.getExportFormat().toString().toLowerCase())) {
        soundStreamHead=null;
      }
    }
    if (t instanceof ShowFrameTag) {
      if (soundStreamHead != null || startSound != null) {
        if (lastSoundStreamHead != null || lastStartSound != null) {
          convertFrame(false,characters,tags,lastSoundStreamHead,lastStartSound,frame,duration,"String_Node_Str","String_Node_Str",files,ret2);
        }
        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;
    }
    convertFrame(false,characters,tags,lastSoundStreamHead,lastStartSound,frame,duration,"String_Node_Str","String_Node_Str",files,ret2);
  }
  if (ret2.length() > 0) {
    ret.append("String_Node_Str").append(layerIndex).append("String_Node_Str").append(randomOutlineColor()).append("String_Node_Str" + "String_Node_Str").append(ret2).append("String_Node_Str" + "String_Node_Str");
  }
}

Fixed version (ground truth):
private void convertSoundLayer(int layerIndex,String backgroundColor,HashMap<Integer,CharacterTag> characters,ReadOnlyTagList tags,ReadOnlyTagList timeLineTags,HashMap<String,byte[]> files,StringBuilder ret){
  StringBuilder ret2=new StringBuilder();
  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;
      for (      Tag ta : tags) {
        if (ta instanceof DefineSoundTag) {
          DefineSoundTag s=(DefineSoundTag)ta;
          if (s.soundId == startSound.soundId) {
            if (!files.containsKey("String_Node_Str" + s.soundId + "String_Node_Str"+ s.getExportFormat().toString().toLowerCase())) {
              startSound=null;
            }
            break;
          }
        }
      }
    }
    if (t instanceof SoundStreamHeadTypeTag) {
      soundStreamHead=(SoundStreamHeadTypeTag)t;
      if (!files.containsKey("String_Node_Str" + soundStreamHead.getCharacterId() + "String_Node_Str"+ soundStreamHead.getExportFormat().toString().toLowerCase())) {
        soundStreamHead=null;
      }
    }
    if (t instanceof ShowFrameTag) {
      if (soundStreamHead != null || startSound != null) {
        if (lastSoundStreamHead != null || lastStartSound != null) {
          convertFrame(false,characters,tags,lastSoundStreamHead,lastStartSound,frame,duration,"String_Node_Str","String_Node_Str",files,ret2);
        }
        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;
    }
    convertFrame(false,characters,tags,lastSoundStreamHead,lastStartSound,frame,duration,"String_Node_Str","String_Node_Str",files,ret2);
  }
  if (ret2.length() > 0) {
    ret.append("String_Node_Str").append(layerIndex).append("String_Node_Str").append(randomOutlineColor()).append("String_Node_Str" + "String_Node_Str").append(ret2).append("String_Node_Str" + "String_Node_Str");
  }
}