【Symfony2】ScopeCrossingInjectionException ・・・

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【Symfony2】ScopeCrossingInjectionException ・・・ | Bamboo lath 日々の記録ScopeCrossingInjectionException ・・・
のエラーが出た時のメモ

use JMS\DiExtraBundle\Annotation as DI;

アノテーションを利用していて以下のようにInjectをした時にエラーが出た。

    /**
     * Constructor.
     *
     * @DI\InjectParams({
     *     "validatorHelper" = @DI\Inject("xxx_util.validator_helper"),
     * })
     * @param ValidatorHelperInterface $validatorHelper
     */
    public function __construct(
        ValidatorHelperInterface $validatorHelper
    ) {
        $this->injectedValidatorHelper = $validatorHelper;
    }

ScopeCrossingInjectionException: Scope Crossing Injection detected: The definition “************” references the service “xxx_util.validator_helper” which belongs to another scope hierarchy.
This service might not be available consistently.
Generally, it is safer to either move the definition “************” to scope “prototype”, or declare “container” as a child scope of “prototype”.
If you can be sure that the other scope is always active,
you can set the reference to strict=false to get rid of this error.

エラー文の最後に書いてあるように「strict=false」を追加すれば通った。

    /**
     * Constructor.
     *
     * @DI\InjectParams({
     *     "validatorHelper" = @DI\Inject("xxx_util.validator_helper", strict = false),
     * })
     * @param ValidatorHelperInterface $validatorHelper
     */
    public function __construct(
        ValidatorHelperInterface $validatorHelper
    ) {
        $this->injectedValidatorHelper = $validatorHelper;
    }

エラーをちゃんと最後まで読もう・・・。
■参考URL
Bundles/JMSDiExtraBundle/Annotations
http://jmsyst.com/bundles/JMSDiExtraBundle/master/annotations#inject