Program: 10275
Project: 10275
Buggy source:
@Override public void execute(ScriptEntry scriptEntry) throws CommandExecutionException {
  dLocation location=(dLocation)scriptEntry.getObject("String_Node_Str");
  Element qty=scriptEntry.getElement("String_Node_Str");
  Element action=scriptEntry.getElement("String_Node_Str");
  Element speed=scriptEntry.getElement("String_Node_Str");
  dItem item=(dItem)scriptEntry.getObject("String_Node_Str");
  dEntity entity=(dEntity)scriptEntry.getObject("String_Node_Str");
  dB.report(scriptEntry,getName(),action.debug() + location.debug() + qty.debug()+ (item != null ? item.debug() : "String_Node_Str")+ (entity != null ? entity.debug() : "String_Node_Str")+ (speed != null ? speed.debug() : "String_Node_Str"));
  dList entityList=new dList();
switch (Action.valueOf(action.asString())) {
case DROP_EXP:
    dEntity orb=new dEntity(location.getWorld().spawnEntity(location,EntityType.EXPERIENCE_ORB));
  ((ExperienceOrb)orb.getBukkitEntity()).setExperience(qty.asInt());
entityList.add(orb.toString());
break;
case DROP_ITEM:
if (qty.asInt() > 1 && item.isUnique()) dB.echoDebug(scriptEntry,"String_Node_Str");
for (int x=0; x < qty.asInt(); x++) {
dEntity e=new dEntity(location.getWorld().dropItemNaturally(location,item.getItemStack()));
e.setVelocity(e.getVelocity().multiply(speed != null ? speed.asDouble() : 1d));
entityList.add(e.toString());
}
break;
case DROP_ENTITY:
if (qty.asInt() > 1 && entity.isUnique()) {
dB.echoDebug(scriptEntry,"String_Node_Str");
entity.spawnAt(location);
entityList.add(entity.toString());
break;
}
for (int x=0; x < qty.asInt(); x++) {
ArrayList<Mechanism> mechanisms=new ArrayList<Mechanism>();
for (Mechanism mechanism : entity.getWaitingMechanisms()) {
mechanisms.add(new Mechanism(new Element(mechanism.getName()),mechanism.getValue()));
}
dEntity ent=new dEntity(entity.getEntityType(),mechanisms);
ent.spawnAt(location);
entityList.add(ent.toString());
}
break;
}
scriptEntry.addObject("String_Node_Str",entityList);
}

Fixed version (ground truth):
@Override public void execute(ScriptEntry scriptEntry) throws CommandExecutionException {
  dLocation location=(dLocation)scriptEntry.getObject("String_Node_Str");
  Element qty=scriptEntry.getElement("String_Node_Str");
  Element action=scriptEntry.getElement("String_Node_Str");
  Element speed=scriptEntry.getElement("String_Node_Str");
  List<dItem> items=(List<dItem>)scriptEntry.getObject("String_Node_Str");
  dEntity entity=(dEntity)scriptEntry.getObject("String_Node_Str");
  dB.report(scriptEntry,getName(),action.debug() + location.debug() + qty.debug()+ (items != null ? aH.debugList("String_Node_Str",items) : "String_Node_Str")+ (entity != null ? entity.debug() : "String_Node_Str")+ (speed != null ? speed.debug() : "String_Node_Str"));
  dList entityList=new dList();
switch (Action.valueOf(action.asString())) {
case DROP_EXP:
    dEntity orb=new dEntity(location.getWorld().spawnEntity(location,EntityType.EXPERIENCE_ORB));
  ((ExperienceOrb)orb.getBukkitEntity()).setExperience(qty.asInt());
entityList.add(orb.toString());
break;
case DROP_ITEM:
for (dItem item : items) {
if (qty.asInt() > 1 && item.isUnique()) dB.echoDebug(scriptEntry,"String_Node_Str");
for (int x=0; x < qty.asInt(); x++) {
dEntity e=new dEntity(location.getWorld().dropItemNaturally(location,item.getItemStack()));
e.setVelocity(e.getVelocity().multiply(speed != null ? speed.asDouble() : 1d));
entityList.add(e.toString());
}
}
break;
case DROP_ENTITY:
if (qty.asInt() > 1 && entity.isUnique()) {
dB.echoDebug(scriptEntry,"String_Node_Str");
entity.spawnAt(location);
entityList.add(entity.toString());
break;
}
for (int x=0; x < qty.asInt(); x++) {
ArrayList<Mechanism> mechanisms=new ArrayList<Mechanism>();
for (Mechanism mechanism : entity.getWaitingMechanisms()) {
mechanisms.add(new Mechanism(new Element(mechanism.getName()),mechanism.getValue()));
}
dEntity ent=new dEntity(entity.getEntityType(),mechanisms);
ent.spawnAt(location);
entityList.add(ent.toString());
}
break;
}
scriptEntry.addObject("String_Node_Str",entityList);
}