Program: 10242
Project: 10242
Buggy source:
@Override public void adjust(Mechanism mechanism){
  Element value=mechanism.getValue();
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dScript.class)) {
    getAssignmentTrait().setAssignment(value.asType(dScript.class).getName(),null);
  }
  if (mechanism.matches("String_Node_Str")) {
    getAssignmentTrait().removeAssignment(null);
  }
  if (mechanism.matches("String_Node_Str")) {
    getNicknameTrait().setNickname(value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    getNicknameTrait().removeNickname();
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dEntity.class)) {
    getCitizen().setBukkitEntityType(value.asType(dEntity.class).getEntityType());
  }
  if (mechanism.matches("String_Node_Str")) {
    getCitizen().setName(value.asString().length() > 16 ? value.asString().substring(0,16) : value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    if (mechanism.requireObject("String_Node_Str",dLocation.class))     getCitizen().spawn(value.asType(dLocation.class));
 else     getCitizen().spawn(getCitizen().getStoredLocation());
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireFloat()) {
    getCitizen().getNavigator().getDefaultParameters().speedModifier(mechanism.getValue().asFloat());
  }
  if (mechanism.matches("String_Node_Str")) {
    getCitizen().despawn(DespawnReason.PLUGIN);
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
    getCitizen().setProtected(value.asBoolean());
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
    getLookCloseTrait().lookClose(value.asBoolean());
  }
  if (mechanism.matches("String_Node_Str")) {
    if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
      getNavigator().getLocalParameters().clearExaminers();
      getNavigator().getLocalParameters().examiner(new MinecraftBlockExaminer());
    }
 else     if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
      getNavigator().getLocalParameters().clearExaminers();
      getNavigator().getLocalParameters().examiner(new FlyingBlockExaminer());
    }
 else     if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
      getNavigator().getLocalParameters().clearExaminers();
      getNavigator().getLocalParameters().examiner(new PathBlockExaminer(this,null));
    }
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireDouble()) {
    getNavigator().getDefaultParameters().distanceMargin(mechanism.getValue().asDouble());
  }
  for (  Property property : PropertyParser.getProperties(this)) {
    property.adjust(mechanism);
    if (mechanism.fulfilled())     break;
  }
  if (!mechanism.fulfilled()) {
    Adjustable entity=new dEntity(getEntity());
    entity.adjust(mechanism);
  }
}

Fixed version (ground truth):
@Override public void adjust(Mechanism mechanism){
  Element value=mechanism.getValue();
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dScript.class)) {
    getAssignmentTrait().setAssignment(value.asType(dScript.class).getName(),null);
  }
  if (mechanism.matches("String_Node_Str")) {
    getAssignmentTrait().removeAssignment(null);
  }
  if (mechanism.matches("String_Node_Str")) {
    getNicknameTrait().setNickname(value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    getNicknameTrait().removeNickname();
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireObject(dEntity.class)) {
    getCitizen().setBukkitEntityType(value.asType(dEntity.class).getEntityType());
  }
  if (mechanism.matches("String_Node_Str")) {
    getCitizen().setName(value.asString().length() > 16 ? value.asString().substring(0,16) : value.asString());
  }
  if (mechanism.matches("String_Node_Str")) {
    if (mechanism.requireObject("String_Node_Str",dLocation.class))     getCitizen().spawn(value.asType(dLocation.class));
 else     getCitizen().spawn(getCitizen().getStoredLocation());
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireFloat()) {
    getCitizen().getNavigator().getDefaultParameters().speedModifier(mechanism.getValue().asFloat());
  }
  if (mechanism.matches("String_Node_Str")) {
    getCitizen().despawn(DespawnReason.PLUGIN);
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
    getCitizen().setProtected(value.asBoolean());
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireBoolean()) {
    getLookCloseTrait().lookClose(value.asBoolean());
  }
  if (mechanism.matches("String_Node_Str")) {
    if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
      getNavigator().getLocalParameters().clearExaminers();
      getNavigator().getLocalParameters().examiner(new MinecraftBlockExaminer());
    }
 else     if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
      getNavigator().getLocalParameters().clearExaminers();
      getNavigator().getLocalParameters().examiner(new FlyingBlockExaminer());
    }
 else     if (mechanism.getValue().toString().equalsIgnoreCase("String_Node_Str")) {
      getNavigator().getLocalParameters().clearExaminers();
      getNavigator().getLocalParameters().examiner(new PathBlockExaminer(this,null));
    }
  }
  if (mechanism.matches("String_Node_Str") && mechanism.requireDouble()) {
    getNavigator().getDefaultParameters().distanceMargin(mechanism.getValue().asDouble());
  }
  for (  Property property : PropertyParser.getProperties(this)) {
    property.adjust(mechanism);
    if (mechanism.fulfilled())     break;
  }
  if (!mechanism.fulfilled()) {
    if (isSpawned())     new dEntity(getEntity()).adjust(mechanism);
 else     mechanism.reportInvalid();
  }
}