Почеу не срабатывает try catch в yiiшных исключениях?

class Object implements Configurable
{
    public function __get($name)
    {
        $getter = 'get' . $name;
        if (method_exists($this, $getter)) {
            return $this->$getter();
        } elseif (method_exists($this, 'set' . $name)) {
            throw new InvalidCallException('Getting write-only property: ' . get_class($this) . '::' . $name);
        } else {
            throw new UnknownPropertyException('Getting unknown property: ' . get_class($this) . '::' . $name);
        }
    }

public function __get($name)
    {
        if (isset($this->_attributes[$name]) || array_key_exists($name, $this->_attributes)) {
            return $this->_attributes[$name];
        }

        if ($this->hasAttribute($name)) {
            return null;
        }

        if (isset($this->_related[$name]) || array_key_exists($name, $this->_related)) {
            return $this->_related[$name];
        }
        $value = parent::__get($name);
        if ($value instanceof ActiveQueryInterface) {
            $this->setRelationDependencies($name, $value);
            return $this->_related[$name] = $value->findFor($name, $this);
        }

        return $value;
    }